高强度耐磨钢板 普碳中板 镀锌方管 异型钢管 工字钢招标公告（欧冶工业品股份有限公司2026）
询价单号
XJ0754396A
采购方式
公开
采购员
联系电话
报名截至时间
2026-02-19T17:00
报价截至时间
2026-02-25T17:00
采购商名称：欧冶工业品采购组织
物料信息
物料代码
物料名称
规格型号
品牌
采购数量
计量单位
要求交货期
备注
C6719959
高强度耐磨钢板
普碳及低合金板/卷;型号规格:18mm;材质:mn13
3400.0
kg
2026-03-15T23:59:59.000+08:00
18mm*2000mm*6000mm，替代导料槽衬板
C1533322
普碳中板
普碳及低合金板/卷;型号规格:12mm;材质:Q235B
10.0
t
2026-02-28T23:59:59.000+08:00
规格需求：6m*1.5m
C6861426
镀锌方管
异型钢管;型号规格:80*80*2;材质: Q235B
998.0
kg
2026-04-30T23:59:59.000+08:00
C5755472
工字钢
工字钢;型号规格:30#C型;材质:Q235
2500.0
kg
2026-03-10T23:59:59.000+08:00
C1657693
槽钢
槽钢;型号规格:14#a;材质:Q355B(Q345B)
2.0
t
2026-03-28T23:59:59.000+08:00
C1533322
普碳中板
普碳及低合金板/卷;型号规格:12mm;材质:Q235B
2.0
t
2026-02-28T23:59:59.000+08:00
询价条款
一、交货地址：太钢各矿山和指定交货地点
二、保证金额度：0.0元
三、商务条款：1、竞价简介：关于“普板、耐磨板、槽钢、工字钢、方管等”的公开采购，采用公开询价方式。2、报价要求：1 、报价截止时间：见表头（北京时间）； 2 、不含13%增值税价到货价； 3、本合同数量为预估数量，具体数量以交货时过磅数量为准，不超合同单项数量的±10%容差； 4、制造商及上游供应商必须填写完整的公司名称，不填写完整名称，视为无效报价。报价品牌一致时，预中标方必须执行最低报价。 5、因计量单位不同，供应商报价错误，经采购员确认修改原因合理，且供应商修正价格后中标，采购员按照该项修正价格再下浮5%核定最终合同价格。 3、合同执行周期：20260301至202603314、交货期要求： 订单发出30天内，供应商需将货物送达买方钢材库5、验收要求：1、送货时必须随车携带原制造厂的质保书。 2、数量验收：收货单位根据卖方提供的交货清单进行验收，除另有约定外，数量验收以买方计量（复磅）结果为准。 3、质量验收：买方在收到货物10天内对货物进行验收；除另有约定外，以买方验收结果为准。6、结算付款：货到验票合格后，可选择以下支付方式： 1、到期日为发票复核日后6个月的通宝，15天内支付。 2、到期日为发票复核日后6个月的商票，15天内支付。 3、到期日为发票复核日后6个月的宝武集团财务公司承兑电子银票，1个月内支付。 4、发票复核日1个月起支付6个月电子银票背书，满5个月未支付转现汇支付。 5、满足中小微企业标准或月度结算总金额小于10万，可选择发票财务复核日后6个月内现汇支付。 6、其他特定结算方式另行协商或执行备案的付款方式。 7、质量保证金：无8、中标及废标原则：（一)中标原则： 1、总价最低中标； （二）废标原则： 1、制造商及上游供应商必须填写完整的公司名称，不填写完整名称，视为无效报价。 9、标的物其他要求：1、适合运输、储存、使用方式及相关安全、环保要求的包装,, 费用由卖方承担。 2、送货车辆符合太钢环保部要求的清洁化车辆（车辆类型是氢能源、电车、甲醇）。10、其他交付要求：1、供货车辆符合太钢环保部要求的清洁化车辆、第三者责任险150万元； 2、满足库房卸货起吊条件；11、其他保证金：无12、支付方式：PJ-票据
四、技术条款：
五、注册资本必须大于等于500万元
六、报名要求：供应商初审公共内容 1 、经营业务必须与营业执照相符。 2 、企业社会征信记录无严重失信或经营异常记录。 3 、宝武集团黑名单记录无不良。 4 、货源清单股东法人授权人不冲突。 5 、贸易商需上传近三年该类产品供应实绩（合同副本）作为证明。 6 、生产商需提供ISO9001、ISO14001、ISO45001管理体系认证证书。
七、资质要求： 1、按买方采购技术要求执行，附质保书； 2、参照GB/T3274-2017、GB/T6728-2017、GB/T706-2016等标准执行
附件下载
GBT3274-2017.pdf
GBT706-2016.pdf
GBT6728-2017.pdf
ICS70.140.50H46中华人民共和国国家标准GB/T3274-2017代替GB912-2008,GB/T3274-2007碳素结构钢和低合金结构钢热轧钢板和钢带Hot-rolledplates,sheetsandstripsofcarbonstructuralsteelsandhighstrengthlowalloystructuralsteels2017-02-28发布2017-11-01实施中华人民共和国国家质量监督检验检疫总局发布中国国家标准化管理委员会GB/T3274-2017前言本标准按照GB/T1.1-2009给出的规则起草。本标准对GB912-2008《碳素结构钢和低合金结构钢热轧薄钢板和钢带》和GB/T3274-2007《碳素结构钢和低合金结构钢热轧厚钢板和钢带》进行合并修订。本标准代替GB912-2008《碳素结构钢和低合金结构钢热轧薄钢板和钢带和GB/T3274-2007《碳素结构钢和低合金结构钢热轧厚钢板和钢带》，与GB912-2008和GB/T3274-2007标准相比，主要技术变化如下：—-钢带允许带缺陷交货长度修改为不得超过每卷钢带总长度的6%（见5.6.4）；—-增加内在质量要求（见5.7）；—扩大检验批重，修改为按炉组批（见7.2）。本标准由中国钢铁工业协会提出。本标准由全国钢标准化技术委员会（SAC/TC183）归口。本标准起草单位：鞍钢股份有限公司、重庆钢铁股份有限公司、首钢总公司、冶金工业信息标准研究院、河北钢铁股份有限公司唐山分公司、马钢（集团）控股有限公司、福建省三钢（集团）有限责任公司、武汉钢铁股份有限公司。本标准主要起草人：刘徐源、杜大松、朴志民、师莉、张维旭、邓翠青、方拓野、刘建丰、刘美红、苏皓璐、唐志刚、李泽瀚、翟利平。本标准所代替标准的历次版本发布情况：--GB/T912—1989、GB912-2008。--GB/T3274-1988、GB/T3274-2007。IGB/T3274-2017碳素结构钢和低合金结构钢热轧钢板和钢带1范围本标准规定了碳素结构钢和低合金结构钢热轧钢板和钢带的订货内容、尺寸、外形、重量、技术要求、试验方法、检验规则、包装、标志及质量证明书。本标准适用于厚度不大于400mm的碳素结构钢和低合金结构钢热轧钢板和钢带（以下简称钢板和钢带）。2规范性引用文件下列文件对于本文件的应用是必不可少的。凡是注日期的引用文件，仅注日期的版本适用于本文件。凡是不注日期的引用文件，其最新版本（包括所有的修改单）适用于本文件。GB/T222钢的成品化学成分允许偏差GB/T228.1金属材料拉伸试验第1部分：室温试验方法GB/T229金属材料夏比摆锤冲击试验方法GB/T232金属材料弯曲试验方法GB/T247钢板和钢带包装、标志及质量证明书的一般规定GB/T700碳素结构钢GB/T709热轧钢板和钢带的尺寸、外形、重量及允许偏差GB/T1591低合金高强度结构钢GB/T2975钢及钢产品力学性能试验取样位置及试样制备GB/T8170数值修约规则与极限数值的表示和判定GB/T14977热轧钢板表面质量的一般要求GB/T17505钢及钢产品交货一般技术要求GB/T20066钢和铁化学成分测定用试样的取样和制样方法3订货内容3.1按本标准订货的合同或订单应包括下列内容：a）标准编号；b）产品名称（钢板或钢带）；c）牌号；d）交货状态；e）尺寸及精度；f）边缘状态（切边EC、不切边EM）；g）重量；h）特殊要求。3.2由钢带剪切的钢板通常切边交货，若订货合同未指明边缘状态，钢带通常不切边交货。1GB/T3274-20174尺寸、外形、重量钢板和钢带的尺寸、外形、重量及允许偏差应符合GB/T709的规定。5技术要求5.1牌号和化学成分钢的牌号和化学成分（熔炼分析）应符合GB/T700和GB/T1591的规定。成品钢板和钢带的化学成分允许偏差应符合GB/T222的规定。5.2冶炼方法钢应采用氧气转炉或电炉冶炼。5.3交货状态钢板和钢带以热轧、控轧或热处理状态交货。5.4力学性能5.4.1厚度小于3mm的钢板和钢带的抗拉强度和断后伸长率应符合GB/T700、GB/T1591的规定，断后伸长率允许比GB/T700或GB/T1591的规定降低5%（绝对值）。根据需方要求，钢板和钢带的屈服强度可按GB/T700、GB/T1591的规定。5.4.2厚度不小于3mm的钢板和钢带的力学和工艺性能应符合GB/T700、GB/T1591的规定。5.5工艺性能钢板和钢带应做180°弯曲试验，试样弯曲压头直径应符合GB/T700、GB/T1591的规定。如供方能保证冷弯试验合格，可不作检验。5.6表面质量5.6.1钢板和钢带断面不应有目视可见分层。钢板和钢带表面不应有结疤、裂纹、折叠、夹杂、气泡和氧化铁皮压入等对使用有害的缺陷。5.6.2钢板和钢带表面允许有不影响使用的薄层氧化铁皮、铁锈和轻微的麻点、划痕等局部缺陷，其凹凸度不得超过钢板和钢带厚度公差之半，并应保证钢板和钢带允许的最小厚度。5.6.3钢板表面缺陷允许清理。清理处应平缓无棱角，并应保证钢板的允许最小厚度。5.6.4在钢带连续生产的过程中，局部的表面缺陷不易发现并去除，因此允许带缺陷交货，但有缺陷部分不得超过每卷钢带总长度的6%。5.6.5经供需双方协商，表面质量可执行GB/T14977的规定。5.7内在质量当需方不允许钢板和钢带内部有分层等缺陷时，应在订货时提出无损检测要求，其检测方法和合格级别由供需双方协商确定。5.8焊接修补钢板表面存在不能按5.6.3规定清理的缺陷，经供需双方协商，可进行焊接修补，并应满足以下2GB/T3274-2017要求：a）采用适当的焊接方法；b）在焊补前采用铲平或磨平等适当的方法完全除去钢板上的有害缺陷，除去部分的深度在钢板公称厚度的20%以内，单面的修磨面积合计应在钢板表面的2%以内；c）钢板焊接部位的边缘上不得有咬边和重叠；堆高应高出轧制面1.5mm以上，然后用铲平或磨平等方法去除堆高：d）热处理钢板焊接修补后应再次进行热处理。6试验方法每批钢板和钢带的检验项目和试验方法应符合表1的规定。表1检验项目、试样数量、取样方法及试验方法序号检验项目取样数量取样方法试验方法1化学成分1个/每炉GB/T20066符合GB/T700、GB/T1591的规定2拉伸试验1个/批GB/T2975GB/T228.13弯曲试验1个/批GB/T2975GB/T2324冲击试验3个/批GB/T2975GB/T2295表面逐张/逐卷-目视6尺寸、外形逐张/逐卷一适宜的量具7检验规则7.1钢板和钢带的检查和验收由供方质量技术监督部门进行。7.2钢板和钢带应成批验收，每批由同一牌号、同一炉号、同一质量等级、同一交货状态的钢板和钢带组成。同一批最小钢板厚度大于10mm时，厚度差应不大于5mm；同一批最小钢板厚度不大于10mm时，厚度差应不大于2mm。应在同一批中最厚钢板上取样。7.3钢板和钢带的取样数量和取样方法应符合表1的规定。7.4钢板和钢带的复验和判定按GB/T17505的规定。7.5力学性能和化学成分检验结果采用修约值比较法，修约规则应符合GB/T8170的规定。8包装、标志及质量证明书钢板和钢带的包装、标志及质量证明书应符合GB/T247的规定。ICS77.140.70H44中华人民共和国国家标准GB/T706—2016代替GB/T706—2008热轧型钢Hotrolledsectionsteel2016-12-30发布，2017-09-01实施中华人民共和国国家质量监督检验检疫总局发布中国国家标准化管理委员会前言本标准按照GB/T1.1—2009给出的规则起草。本标准代替GB/T706—2008《热轧型钢》。本标准与GB/T706—2008相比主要技术变化如下:———删除了热轧L型钢相关内容(见2008年版的表3、表5、表A.5);———增加了订货内容(见第3章);———调整了部分尺寸、外形允许偏差(见表1、表2,2008年版的表1、表2);———调整重量允许偏差要求(见4.4,2008年版的3.4);———增加了规格表示方法(见4.5);———调整了截面面积、理论重量及截面特性参数等数值(见表A.1、表A.2、表A.3、表A.4)。本标准由中国钢铁工业协会提出。本标准由全国钢标准化技术委员会(SCA/TC183)归口。本标准起草单位:马钢(集团)控股有限公司、河北津西钢铁集团股份有限公司、河北钢铁集团唐钢分公司、山东钢铁股份有限公司莱芜分公司、鞍山宝得钢铁有限公司、日照钢铁控股集团有限公司、常熟市龙腾特种钢有限公司、冶金工业信息标准研究院。本标准主要起草人:龚庆华、赵海燕、赵一臣、邓翠青、王中学、王洪新、王福良、赵勋、刘宝石、吴保桥、陈春生、赵新华、魏振洲、王昌华、奚铁、王玉婕、张卫斌、张步海。本标准所代替标准的历次版本发布情况为:———GB/T706—1965、GB/T706—1988、GB/T706—2008;———GB/T707—1965、GB/T707—1988;———GB/T9787—1988;———GB/T9788—1988;———GB/T9946—1988。Ⅰ热轧型钢1范围本标准规定了热轧工字钢、热轧槽钢、热轧等边角钢、热轧不等边角钢的订货内容、尺寸、外形、重量及允许偏差、技术要求、试验方法、检验规则、包装、标志及质量证明书。本标准适用于热轧等边角钢、热轧不等边角钢及腿部内侧有斜度的热轧工字钢和热轧槽钢(以下简称型钢)。2规范性引用文件下列文件对于本文件的应用是必不可少的。凡是注日期的引用文件,仅注日期的版本适用于本文件。凡是不注日期的引用文件,其最新版本(包括所有的修改单)适用于本文件。GB/T228.1金属材料拉伸试验第1部分:室温试验方法GB/T229金属材料夏比摆锤冲击试验方法GB/T232金属材料弯曲试验方法GB/T700碳素结构钢GB/T1591低合金高强度结构钢GB/T2101型钢验收、包装、标志及质量证明书的一般规定GB/T2975钢及钢产品力学性能试验取样位置及试样制备YB/T4427热轧型钢表面质量一般要求3订货内容按本标准订货的合同应包含下列技术内容:a)产品名称;b)标准编号;c)牌号;d)型号、规格;e)交货长度;f)重量和数量;g)需方提出的其他特殊要求。4尺寸、外形、重量及允许偏差4.1尺寸及表示方法4.1.1型钢的截面图示及标注符号见图1~图4。4.1.2型钢的截面尺寸、截面面积、理论重量及截面特性参数应分别符合附录A中表A.1~表A.4的规定。1GB/T706-20164.2尺寸、外形及允许偏差4.2.1型钢的尺寸、外形及允许偏差应符合表1~表2的规定。根据需方要求，型钢的尺寸、外形及允许偏差也可按照供需双方协议规定。Y一斜度1:6Y.ZFX-d-fy-bYlrb说明：说明：h--高度；h—高度；6—-腿宽度；6—-腿宽度；d--腰厚度；d--腰厚度；—-腿中间厚度；—-腿中间厚度；t—-内圆弧半径；——内圆弧半径；r--腿端圆弧半径。r--腿端圆弧半径；Z。--重心距离。图1工字钢截面图图2槽钢截面图Y0的XMNPXXuX古1。YY说明：说明：6—边宽度；B--长边宽度；6--短边宽度；d—-边厚度；r—内圆弧半径；d-边厚度；r--边端圆弧半径；—-内圆弧半径；rZ.——重心距离。r--边端圆弧半径；X。—重心距离；Y。—重心距离。图3等边角钢截面图图4不等边角钢截面图24.2.2工字钢的腿端外缘钝化、槽钢的腿端外缘和肩钝化不应使直径等于0.18t的圆棒通过,角钢的边端外角和顶角钝化不应使直径等于0.18d的圆棒通过。4.2.3工字钢、槽钢的外缘斜度和弯腰挠度、角钢的顶端直角在距端头不小于750mm处检查。4.2.4工字钢、槽钢的腿中间厚度(t)的允许偏差为±0.06t。4.2.5型钢不应有明显的扭转。表1工字钢和槽钢尺寸、外形及允许偏差，单位为毫米项目允许偏差图示高度(h)h<100±1.5100≤h<200±2.0200≤h<400±3.0h≥400±4.0腿宽度(b)h<100±1.5100≤h<150±2.0150≤h<200±2.5200≤h<300±3.0300≤h<400±3.5h≥400±4.0腰厚度(d)h<100±0.4100≤h<200±0.5200≤h<300±0.7300≤h<400±0.8h≥400外缘斜度(T1、T2)±0.9T1、T2≤1.5%bT1+T2≤2.5%b弯腰挠度(W)W≤0.15d3表1(续)，单位为毫米项目允许偏差图示弯曲度工字钢每米弯曲度≤2mm总弯曲度≤总长度的0.20%适用于上下、左右大弯曲槽钢每米弯曲度≤3mm总弯曲度≤总长度的0.30%中心偏差(S)工字钢h<100±1.5S=(b1-b2)/2100≤h<150±2.0150≤h<200±2.5200≤h<300±3.0300≤h<400±3.5h≥400±4.0注:尺寸和形状的测量部位见图示。表2角钢尺寸、外形及允许偏差，单位为毫米项目允许偏差图示等边角钢不等边角钢边宽度(B,b)ba≤56±0.8±0.856±1.2±1.590±1.8±2.0140ba>200±2.5±3.5±2.5±3.5边厚度(d)ba≤56±0.456±0.690±0.7140±1.0ba>200±1.4顶端直角α≤50\'弯曲度每米弯曲度≤3mm总弯曲度≤总长度的0.30%适用于上下、左右大弯曲注:尺寸和形状的测量部位见图示。a不等边角钢按长边宽度B。4GB/T706-20164.3长度及允许偏差型钢的交货长度应在合同中注明，其长度允许偏差应符合表3规定。表3型钢的长度允许偏差单位为毫米长度允许偏差≤8000十500>8000十8004.4重量及允许偏差4.4.1型钢应按理论重量交货，理论重量按密度为7.85g/cm计算。经供需双方协商并在合同中注明，亦可按实际重量交货。4.4.2型钢重量允许偏差应不超过±5%。重量偏差（%按式（1）计算。重量允许偏差适用于同一尺寸且质量超过1吨的一批，当一批同一尺寸的质量不大于1t但根数大于10根时也适用。实际重量一理论重量重量偏差=×100%….（1）理论重量4.4.3型钢的截面面积计算公式按表4所示。表4截面面积的计算方法型钢种类计算公式工字钢hd+2t（b-d）+0.577（r²-r²）槽钢hd十2t（b-d十0.339（r²-r)等边角钢d（26-d）十0.215(r²-2r²）不等边角钢d（B十6-d十0.215(-2r）4.5规格表示方法工字钢：“I”与高度值×腿宽度值×腰厚度值；如：I450×150×11.5（简记为I45a）。槽钢：“[”与高度值×腿宽度值×腰厚度值；如：[200×75×9（简记为[20b）。等边角钢：“”与边宽度值×边宽度值×边厚度值；如：200×200×24（简记为200×24）。不等边角钢：“”与长边宽度值×短边宽度值×边厚度值；如：160×100×16。5技术要求5.1牌号和化学成分钢的牌号和化学成分（熔炼分析）应符合GB/T700或GB/T1591的有关规定。根据需方要求，经供需双方协议，也可按其他牌号和化学成分供货。55.2力学性能型钢的力学性能应符合GB/T700或GB/T1591的有关规定。根据需方要求,经供需双方协议,也可按其他力学性能指标供货。5.3交货状态型钢以热轧状态交货。5.4表面质量5.4.1型钢表面不应有裂缝、折叠、结疤、分层和夹杂。5.4.2型钢表面允许有局部发纹、凹坑、麻点、划痕和氧化铁皮压入等缺陷存在,但不应超出型钢尺寸的允许偏差。5.4.3型钢表面缺陷允许清除,清除处应圆滑无棱角,但不应进行横向清除。清除宽度不应小于清除深度的五倍,清除后的型钢尺寸不应超出尺寸的允许偏差。5.4.4型钢端部不应有大于5mm的毛刺。5.4.5根据供需双方协议,表面质量也可按YB/T4427的规定执行。6试验方法每批钢材的检验项目、取样数量、取样方法和试验方法应符合表5的规定。表5检验项目、取样数量、取样方法和试验方法序号检验项目取样数量取样方法试验方法1化学成分(熔炼分析)按相应牌号标准的规定2拉伸试验1个/批GB/T2975aGB/T228.13弯曲试验1个/批GB/T2324冲击试验3个/批GB/T2295表面质量逐根—目视、量具6尺寸、外形逐根—量具7重量偏差4.4.24.4.2称重a工字钢、槽钢在腰部取样。7检验规则7.1型钢的检查和验收由供方技术质量监督部门进行。需方有权对本标准或合同所规定的任一检验项目进行检查和验收。7.2型钢的组批按GB/T700、GB/T1591及相应标准规定。7.3型钢的复验和验收规则应符合GB/T2101的规定。8包装、标志及质量证明书型钢的包装、标志及质量证明书应符合GB/T2101的规定。6附录A(规范性附录)型钢截面尺寸、截面面积、理论重量及截面特性表A.1工字钢截面尺寸、截面面积、理论重量及截面特性型号截面尺寸/mm截面面积/cm2理论重量/(kg/m)外表面积/(m2/m)惯性矩/cm4惯性半径/cm截面模数/cm3hbdtrr1IxIyixiyWxWy10100684.57.66.53.314.3311.30.43224533.04.141.5249.09.721212.612012674745.05.08.48.47.07.03.53.517.8018.1014.014.20.4930.50543648846.946.94.955.201.621.6172.777.512.712.714140805.59.17.53.821.5016.90.55371264.45.761.7310216.116160886.09.98.04.026.1120.50.621113093.16.581.8914121.218180946.510.78.54.330.7424.10.68116601227.362.0018526.020a2001007.011.49.04.535.5527.90.74223701588.152.1223731.520b1029.039.5531.10.74625001697.962.0625033.122a2201107.512.39.54.842.1033.10.81734002258.992.3130940.922b1129.546.5036.50.82135702398.782.2732542.724a2401168.013.010.05.047.7137.50.87845702809.772.4238148.424b11810.052.5141.20.88248002979.572.3840050.425a2501168.048.5138.10.898502028010.22.4040248.325b11810.053.5142.00.90252803099.942.4042352.427a2701228.513.710.55.354.5242.80.958655034510.92.5148556.627b12410.559.9247.00.962687036610.72.4750958.928a2801228.555.3743.50.978711034511.32.5050856.628b12410.560.9747.90.982748037911.12.4953461.230a3001269.014.411.05.561.2248.11.031895040012.12.5559763.530b12811.067.2252.81.035940042211.82.5062765.930c13013.073.2257.51.039985044511.62.4665768.532a3201309.515.011.55.867.1252.71.0841110046012.82.6269270.832b32c13213411.513.573.5279.9257.762.71.0881.092116001220050254412.612.32.612.6172676076.081.236a36013610.015.812.06.076.4460.01.1851580055214.42.6987581.236b13812.083.6465.71.1891650058214.12.6491984.336c14014.090.8471.31.1931730061213.82.6096287.47表A.1(续)型号截面尺寸/mm截面面积/cm2理论重量/(kg/m)外表面积/(m2/m)惯性矩/cm4惯性半径/cm截面模数/cm3hbdtrr1IxIyixiyWxWy40a40014210.516.512.56.386.0767.61.2852170066015.92.77109093.240b14412.594.0773.81.2892280069215.62.71114096.240c14614.5102.180.11.2932390072715.22.65119099.645a45015011.518.013.56.8102.480.41.4113220085517.72.89143011445b15213.5111.487.41.4153380089417.42.84150011845c15415.5120.494.51.4193530093817.12.79157012250a50015812.020.014.07.0119.293.61.53946500112019.73.07186014250b16014.0129.21011.54348600117019.43.01194014650c55a55016216616.012.521.014.57.3139.2134.11091051.5471.66750600629001220137019.021.62.963.192080229015116455b16814.5145.11141.67165600142021.23.14239017055c17016.5156.11231.67568400148020.93.08249017556a56016612.5135.41061.68765600137022.03.18234016556b16814.5146.61151.69168500149021.63.16245017456c17016.5157.81241.69571400156021.33.16255018363a63017613.022.015.07.5154.61211.86293900170024.53.31298019363b17815.0167.21311.86698100181024.23.29316020463c18017.0179.81411.870102000192023.83.273300214注:表中r、r1的数据用于孔型设计,不做交货条件。表A.2槽钢截面尺寸、截面面积、理论重量及截面特性型号截面尺寸/mm截面面积/cm2理论重量/(kg/m)外表面积/(m2/m)惯性矩/cm4惯性半径/cm截面模数/cm3重心距离/hbdtrr1IxIyIy1ixiyWxWycmZ0550374.57.07.03.56.9255.440.22626.08.3020.91.941.1010.43.551.356.363404.87.57.53.88.4466.630.26250.811.928.42.451.1916.14.501.366.565404.37.57.53.88.2926.510.26755.212.028.32.541.1917.04.591.38880435.08.08.04.010.248.040.30710116.637.43.151.2725.35.791.4310100485.38.58.54.212.7410.00.36519825.654.93.951.4139.77.801.5212120535.59.09.04.515.3612.10.42334637.477.74.751.5657.710.21.6212.6126535.59.09.04.515.6912.30.43539138.077.14.951.5762.110.21.598表A.2(续)型号截面尺寸/mm截面面积/cm2理论重量/(kg/m)外表面积/(m2/m)惯性矩/cm4惯性半径/cm截面模数/cm3重心距离/cmhbdtrr1IxIyIy1ixiyWxWyZ014a140586.09.59.54.818.5114.50.48056453.21075.521.7080.513.01.7114b608.021.3116.70.48460961.11215.351.6987.114.11.6716a160636.510.010.05.021.9517.20.53886673.31446.281.8310816.31.8016b658.525.1519.80.54293583.41616.101.8211717.61.7518a180687.010.510.55.225.6920.20.596127098.61907.041.9614120.01.8818b709.029.2923.00.60013701112106.841.9515221.51.8420a200737.011.011.05.528.8322.60.65417801282447.862.1117824.22.0120b759.032.8325.80.65819101442687.642.0919125.91.9522a220777.011.511.55.831.8325.00.70923901582988.672.2321828.22.1022b799.036.2328.50.71325701763268.422.2123430.12.0324a240787.012.012.06.034.2126.90.75230501743259.452.2525430.52.1024b809.039.0130.60.75632801943559.172.2327432.52.0324c8211.043.8134.40.76035102133888.962.2129334.42.0025a250787.034.9127.40.72233701763229.822.2427030.62.0725b809.039.9131.30.77635301963539.412.2228232.71.9825c8211.044.9135.30.78036902183849.072.2129535.91.9227012.512.56.227a27b82847.59.539.2744.6730.835.10.8260.8304360469021623939342810.510.32.342.3132334735.537.72.132.0627c8611.550.0739.30.834502026146710.12.2837239.82.0328a280827.540.0231.40.846476021838810.92.3334035.72.1028b849.545.6235.80.850513024242810.62.3036637.92.0228c8611.551.2240.20.854550026846310.42.2939340.31.9530a300857.513.513.56.843.8934.50.897605026046711.72.4340341.12.1730b879.549.8939.20.901650028951511.42.4143344.02.1330c8911.555.8943.90.905695031656011.22.3846346.42.0932a320888.014.014.07.048.5038.10.947760030555212.52.5047546.52.2432b9010.054.9043.10.951814033659312.22.4750949.22.1632c9212.061.3048.10.955869037464311.92.4754352.62.0936a360969.016.016.08.060.8947.81.0531190045581814.02.7366063.52.4436b9811.068.0953.51.0571270049788013.62.7070366.92.3736c10013.075.2959.11.0611340053694813.42.6774670.02.349表A.2(续)型号截面尺寸/mm截面面积/cm2理论重量/(kg/m)外表面积/(m2/m)惯性矩/cm4惯性半径/cm截面模数/cm3重心距离/cmhbdtrr1IxIyIy1ixiyWxWyZ040a40010010.518.018.09.075.0458.91.14417600592107015.32.8187978.82.4940b10212.583.0465.21.14818600640114015.02.7893282.52.4440c10414.591.0471.51.152197004.72.7598686.22.4268812201注:表中r、r1的数据用于孔型设计,不做交货条件。表A.3等边角钢截面尺寸、截面面积、理论重量及截面特性型号截面尺寸/mm截面面积/cm2理论重量/(kg/m)外表面积/(m2/m)惯性矩/cm4惯性半径/cm截面模数/cm3重心距离/bdrIxIx1Ix0Iy0ixix0iy0WxWx0Wy0cmZ02203.51.1320.890.0780.400.810.630.170.590.750.390.290.450.200.601.4591.150.0770.501.090.780.220.580.730.380.360.550.240.642.5251.4321.120.0980.821.571.290.340.760.950.490.460.730.330.731.8591.460.0971.032.111.620.430.740.930.480.590.920.400.763.0304.51.7491.370.1171.462.712.310.610.911.150.590.681.090.510.852.2761.790.1171.843.632.920.770.901.130.580.871.370.620.893.6362.1091.660.1412.584.684.091.071.111.390.710.991.610.761.002.7562.160.1413.296.255.221.371.091.380.701.282.050.931.043.3822.650.1413.957.846.241.651.081.360.71.562.451.001.0744052.3591.850.1573.596.415.691.491.231.550.791.232.010.961.093.0862.420.1574.608.567.291.911.221.540.791.602.581.191.133.7922.980.1565.5310.78.762.301.211.520.781.963.101.391.174.5452.6592.090.1775.179.128.202.141.401.760.891.582.581.241.223.4862.740.1776.6512.210.62.751.381.740.892.053.321.541.2664.2925.0773.373.990.1760.1768.049.3315.218.412.714.83.333.891.371.361.721.700.880.802.512.954.004.641.812.061.301.335505.52.9712.330.1977.1812.511.42.981.551.961.001.963.221.571.343.8973.060.1979.2616.714.73.821.541.940.992.564.161.961.384.8033.770.19611.220.917.84.641.531.920.983.135.032.311.4265.6884.460.19613.125.120.75.421.521.910.983.685.852.631.4601表A.3(续)型号截面尺寸/mm截面面积/cm2理论重量/(kg/m)外表面积/(m2/m)惯性矩/cm4惯性半径/cm截面模数/cm3重心距离/cmbdrIxIx1Ix0Iy0ixix0iy0WxWx0Wy0Z05.656363.3432.620.22110.217.616.14.241.752.201.132.484.082.021.484.393.450.22013.223.420.95.461.732.181.113.245.282.521.535.4154.250.22016.029.325.46.611.722.171.103.976.422.981.576.425.040.22018.735.329.77.731.712.151.104.687.493.401.617.4045.810.21921.241.233.68.821.692.131.095.368.493.801.648.3676.570.21923.647.237.49.891.682.111.096.039.444.161.686606.55.8294.580.23619.936.131.68.211.852.331.194.597.443.481.676.9145.430.23523.443.336.99.601.832.311.185.418.703.981.707.9776.260.23526.450.741.911.01.822.291.176.219.884.451.749.027.080.23529.558.046.712.31.812.271.176.9811.04.881.786.36374.9783.910.24819.033.430.27.891.962.461.264.136.783.291.706.1434.820.24823.241.736.89.571.942.451.255.088.253.901.747.2885.720.24727.150.143.011.21.932.431.246.009.664.461.788.4126.600.24730.958.649.012.81.922.411.236.8811.04.981.829.5157.470.24734.567.154.614.31.902.401.237.7512.35.471.851011.669.150.24641.184.364.917.31.882.361.229.3914.66.361.9377085.5704.370.27526.445.741.811.02.182.741.405.148.444.171.866.8765.400.27532.257.251.113.32.162.731.396.3210.34.951.918.1606.410.27537.868.759.915.62.152.711.387.4812.15.671.959.4247.400.27543.180.368.417.82.142.691.388.5913.86.341.9910.678.370.27448.291.976.420.02.122.681.379.6815.46.982.037.57597.4125.820.29540.070.663.316.62.332.921.507.3211.95.772.048.7976.910.29447.084.674.419.52.312.901.498.6414.06.672.0710.167.980.29453.698.785.022.22.302.891.489.9316.07.442.1111.509.030.29460.011395.124.92.282.881.4711.217.98.192.15912.8310.10.29466.112710527.52.272.861.4612.419.88.892.181014.1311.10.29372.014211430.12.262.841.4613.621.59.562.228807.9126.210.31548.885.477.320.32.483.131.608.3413.76.662.159.3977.380.31457.410391.023.72.473.111.599.8716.17.652.1910.868.530.31465.612010427.12.463.101.5811.418.48.582.2312.309.660.31473.513711730.42.443.081.5712.820.69.462.27913.7310.80.31481.115412933.62.433.061.5614.322.710.32.311015.1311.90.31388.417214036.82.423.041.5615.624.811.12.3511表A.3(续)型号截面尺寸/mm截面面积/cm2理论重量/(kg/m)外表面积/(m2/m)惯性矩/cm4惯性半径/cm截面模数/cm3重心距离/cmbdrIxIx1Ix0Iy0ixix0iy0WxWx0Wy0Z099061010.648.350.35482.814613134.32.793.511.8012.620.69.952.4412.309.660.35494.817015039.22.783.501.7814.523.611.22.4813.9410.90.35310619516944.02.763.481.7816.426.612.42.52915.5712.20.35311821918748.72.753.461.7718.329.413.52.561017.1713.50.35312924420453.32.743.451.7620.132.014.52.591220.3115.90.35214929423662.22.713.411.7523.637.116.52.671010061211.939.370.39311520018247.93.103.902.0015.725.712.72.6713.8010.80.39313223420954.73.093.891.9918.129.614.32.7115.6412.30.39314826723561.43.083.881.9820.533.215.82.76917.4613.70.39216430026068.03.073.861.9722.836.817.22.801019.2615.10.39218033428574.43.053.841.9625.140.318.52.841222.8017.90.39120940233186.83.033.811.9529.546.821.12.911426.2620.60.39123747137499.03.003.771.9433.752.923.42.991629.6323.30.3902635404141112.983.741.9437.858.625.63.06111101215.2011.90.43317731128173.43.414.302.2022.136.117.52.9617.2413.50.43319935531682.43.404.282.1925.040.719.43.01101221.2625.2016.719.80.4320.4312422834455353844481001173.383.354.254.222.172.1530.636.149.457.622.926.23.093.161429.0622.80.4313216255081333.324.182.1441.365.329.13.2412.51251419.7515.50.4922975214711233.884.882.5032.553.325.93.371024.3719.10.4913626525741493.854.852.4840.064.930.63.451228.9122.70.4914237836711753.834.822.4641.276.035.03.531433.3726.20.4904829167642003.804.782.4554.286.439.13.61141401637.7429.60.48953710508512243.774.752.4360.996.343.03.681027.3721.50.5515159158172124.345.462.7850.682.639.23.821232.5125.50.55160411009592494.315.432.7659.896.945.03.901437.5729.50.550689128010902844.285.402.7568.811050.53.98151501642.5433.40.549770147012203194.265.362.7477.512355.64.0623.7518.60.5925219008272154.695.903.0147.478.038.13.991029.3723.10.591638113010102624.665.872.9958.495.545.54.081234.9127.40.591749135011903084.635.842.9769.011252.44.151440.3731.70.590856158013603524.605.802.9579.512858.84.23151643.0645.7433.835.90.5900.58990795816901810144015203743954.594.585.785.772.952.9484.689.613614361.964.94.274.3121表A.3(续)型号截面尺寸/mm截面面积/cm2理论重量/(kg/m)外表面积/(m2/m)惯性矩/cm4惯性半径/cm截面模数/cm3重心距离/cmbdrIxIx1Ix0Iy0ixix0iy0WxWx0Wy0Z016160101631.5024.70.630780137012403224.986.273.2066.710952.84.311237.4429.40.630917164014603774.956.243.1879.012960.74.391443.3034.00.6291050191016704324.926.203.1691.014768.24.471649.0738.50.6291180219018704854.896.173.1410316575.34.55181801242.2433.20.7101320233021005435.597.053.5810116578.44.891448.9038.40.7091510272024106225.567.023.5611618988.44.971655.4743.50.7091700312027006995.546.983.5513121297.85.051861.9648.60.7081880350029907625.506.943.511462351055.1320200141854.6442.90.7882100373033408646.207.823.981452361125.461662.0148.70.7882370427037609716.187.793.961642661245.541869.3054.40.78726204810416010806.157.753.941822941365.622076.5160.10.78728705350455011806.127.723.932003221475.692490.6671.20.78533406460529013806.077.643.902363741675.8722220162168.6753.90.86631905680506013106.818.594.372003261546.031876.7560.30.86635406400562014506.798.554.352233611686.112084.7666.50.86538707110615015906.768.524.342453951826.18222492.68100.572.878.90.8650.864420045207830685507670171701830706.736.718.488.454.324.312672894294611952086.266.3326108.385.00.86448309280769020006.688.414.303104922216.4125250182487.8469.00.98552709380837021707.759.764.972904732246.842097.0576.20.984578010400918023807.729.734.953205192436.9222106.283.30.983628011500997025807.699.694.933495642617.0024115.290.40.9836770125001070027907.679.664.923786082787.0726124.297.50.9827240136001150029807.649.624.904066502957.1528133.01040.9827700146001220031807.619.584.894336913117.2230141.81110.9818160157001290033807.589.554.884617313277.3032150.51180.9818600168001360035707.569.514.874887703427.3735163.41280.9809240184001460038507.529.464.865278273647.48注:截面图中的r1=1/3d及表中r的数据用于孔型设计,不做交货条件。31书#765*+.2!1!.!)!$(!(!3’!/!0!/0!3!2!2!.!2.!)!)!$!$!(!(!.*’!0’!1’!/!/!0!0!0!3!3!2!2!2!1!/1!1!(.!.!0.!.!)!-!,+(!(!(!(!(!(!2(!(!’!’!’!’!’!1(!(!(!1(!’!3’!’!’!(\"\"#43$#///301’10/3030((//3132#21/.(!(!’!’!/!/!0!0!3!0!13!3!3!2!2!2!2!21!1!1!1!’!(’!//!/!3!0!3!3!1!1!.!.!.!)!)!)!)!1$!$!$!$!23!3!.!.!$!(!’!’!0!/!2!3!3!.!.!1!1!$!($!$!$!’\"\"#0/.)!)!$!/(!0/!3!2!.!$!/!3!$!0!$)!3!(!1!’!’!(!)!)(’!/!2!)!/!)!$!.!((!/’!3!’(!1!0!1!)!/!(!’!0!2!$!$!0’!/!1!)!(!3!.!/!1!3!1’!$!/(!$!3$!/!()!0!.!)//)!/!3!/!3’!(!1$(!0!.!)!1!)!3’!.!3!2!/!1!.!1!/’!10!/$!.!2!/!1!/!0.!’!/!$!.!/!($!\"$’\"$\"-\"$,#2.!.!)!)!3$)!)!)!(’)!)!)!)!)!)!$!$!$!$!$!$!$!$!\"$+\"*\")%&(#/01/1(’’\"’$$\"$##)!’!1’!1!2!’!)!2!’!)!’3!/!’!/.!1!21!2!/!0!0!0!&%$#$/!(/!3/!#(’’/\"0)./$2$$(.’/’!/$(.’.(0.\"!0!\")/!$\"$!(/!\"$2!\"$!’$!\"(0!\"\"’(!0/!\"’41书#876++.’!’!0!2!2!2!2!/!3!3!.!.!($!$!(!’!3!.!.!)!.*)!$!$!(!)!)!$!$!$!3$!(!(!’!’!0!0!3!.!.!)!-!,+0’!’!’!’!(!/(!(!(!(!(!.(!(!(!’(!(!(!2!2!2!2!(\"##54%$3(’(2!!1!1!)!(!((’302!$!/!$!)!210!1!2!3!/!0!(!2!3!2)!(!$!0!1!3$!#320/)!.!.!.!)!.!.!.!($!$!$!$!(!(!(!(!/!/!/!2!’!’!’!1(!’!’!(!(!0!0!0!0!/!/!/!/!’!(!(!0(!3(!(!0(!(!0!0!0!0!3!1!1!1!$!$!)!)!)!)!)!)!’\"##10/’!0!3!)!2!1!$!’!.!3!/!(!’!.!0!(!/!$!2!)!).!’!$!’!)!’!1!(!0!2!/!3!0!)!03!/!2!/!0!1.!1!.!.!3!(!’!’!$!3!(!0’!)!$!2)!2!/!).!(!$!23!)!’!0/!.!0!’$!21!0!.!.!.!)!2#\"(\"%#.\"$-!0$!$!$!$!$!$!$!$!/$!$!.$!$!(!(!(!(!’(!’0(!(!0(!#\",\"+#*%&)!1/2/)!!1!3!0!#(%$\"%#$)!2$!/2’!0!(!0!//!1!3$!/0!1!3)!2!)!0!’!’2!(!3!)!’&%$$1#02122\"..020(21!/.1.#\"#0!/#012!#0(!#2#151书#876++.2!2!0!/!.!0.!)!$!2!12!0!/!3!.!.!)!$!$!’$!2$.(!’221!’!2.*2!0!0!/!1!1!3!.!.!)!3)!/$!3!.!)!$!$!$!1$!$0((!’$$)!2!$-!,+’!’!’!3(!1’!/’!’!’!’!3’!’!’!0(!.(!(!(!(!(!.3(!.1211(!(..$1!(!.(\"##54%$!(!3!3$!0!.!(!2!2!2!2!/!1!1!(!1!3!)$1!023$$!’!((3(!2!.!0!0!’!3(!$!.!2!12!’!)!1!12!(!0!0$(!1)2((!$!.’3!0!(!2!3!0’!(!/.!2!(!3!$!03!.!1!0(!.!10!)!$02!0(’/1!(!23#320/2!2!2!2!0/!/!/!/!3!3!3!3!3!3!3!3!3!3!3)!$/0)!)$$0!)!$.!.!3!03!(!$!$!$!32!2!2!2!22!2!2!1’!’!’!21!$$.1!1$$/!/!$2!2!2!’!.!.!13!23!2!’!’!’!1!1!/!’/!/!/!’)!2)1)!.222!.!2’\"##10/’!.!2!$!31!($!32!3’!31!1!21)!3!1$$)$$’0))(1)))!31!1/!3/3/303/((00./’’1’23!.!’3!3!20’!/2!//32.$3)(/$$$.()’’221/(3131.0()..’)03)).1)$/1/203002013/1...)#\"(\"%#.\"$-!(!’(!(!2(!(’!’!’!’!2’!2’!’!2’!’!.’!’!’!’!’!$)2!.).))2!2...)!2!.#\",\"+#*%&)!1003!2!)!0!2!(!1$!2!/!3!1!(!1/!.!/!(!3!3)0!$(/$$!1!.(#(%$\"%#$0!(!3!)!)!33!/!32(!.!$!’!0’!1!$!0!1!3!.!$(!2$2).!/.’((1!$!3(’&%$$$)(#/1.)$’))0)\"/.1.3.3!2$.’).2)0#\"#/#12!$#3’)#32)#061书#876++./!3!.!)!0!1!12!2!&HGFED%CBA\"@?>=5;$:..*’!0!0!21!/!3!3!.!-!,+(!’2(!(!(!(!3(!(!(!(\"##54%$3!2!(!3!$!(!(!$!0!(!.!’!.!0’!3!2!.!0!#320/’!’!(!/(!2!2!2!2!)!)!.!.!0!0!0!’!/!2!02!02!0’!’!1(!(!’\"##10/)23/)0/#\"(\"%#.\"$-!0!20!0!0!1!1!1!1!#\",\"+#*%&)!(!0!11!1!/!’!.!1!#(%$\"%#$(!/2!3!)!3!/!2!0!’&%$$’)#.)\".0)!./#\"#/0!#)71ICS77.140.70H44中华人民共和国国家标准GB/T6728-2017代替GB/T6728-2002结构用冷弯空心型钢Coldforminghollowsectionalsteelforgeneralstructure2017-07-12发布2018-04-01实施中华人民共和国国家质量监督检验检疫总局发布中国国家标准化管理委员会GB/T6728-2017前言本标准按照GB/T1.1-2009给出的规则起草。本标准代替GB/T6728-2002《结构用冷弯空心型钢尺寸、外形、重量及允许偏差》，与GB/T6728-2002相比主要变化如下：——修改了标准名称；---删除了异型管的有关规定；—增加了薄壁型钢规格；---增加了边部垂直度的有关规定；--修改了弯曲度的有关规定；--增加了技术要求的有关规定。本标准由中国钢铁工业协会提出。本标准由全国钢标准化技术委员会（SAC/TC183）归口。本标准起草单位：冶金工业信息标准研究院、天津友发钢管集团股份有限公司、邯郸市正大制管有限公司、武汉钢铁江北集团冷弯型钢有限公司、泰安同泰兴金属结构制造有限公司、山西鼎荣冷弯型钢有限公司、唐山京华制管有限公司。本标准主要起草人：王玉婕、张松明、姜海东、朱少文、赵勇、牛赟、温朝江、刘宝石、丁秀臣、李毅、盛珍剑、李俊才、宋宇光、刘春雷、王亚林、张盛。本标准所代替标准的历次版本发布情况为：—-GB/T6728-1986、GB/T6728-2002。IGB/T6728-2017结构用冷弯空心型钢1范围本标准规定了结构用冷弯空心型钢的订货内容、分类、代号、截面、尺寸及允许偏差、长度及允许偏差、外形、重量及允许偏差、技术要求和标记示例。本标准适用于冷轧或热轧钢板和钢带在连续辊式冷弯机组上生产的圆、矩形和方形冷弯空心型钢（以下简称型钢），也适用于连续热浸镀型钢。但不适用于拉拔、冲压、折弯等方式生产的型钢和采用镀锌钢板及钢带冷弯并焊接成型的型钢。本标准所规定的型钢主要采用高频电阻焊接方式，也可采用氩弧焊或其他焊接方法。2规范性引用文件下列文件对于本文件的应用是必不可少的。凡是注日期的引用文件，仅注日期的版本适用于本文件。凡是不注日期的引用文件，其最新版本（包括所有的修改单）适用于本文件。GB/T6725冷弯型钢通用技术要求3订货内容按本标准订货的合同或订单应包括下列内容：a）标准编号；b）产品名称；c）牌号；d）交货重量；e）尺寸与外形；f）特殊要求。4分类、代号型钢按外形形状分为方形、矩形、圆形。其代号为：1）方形型钢，也可简称为方管，代号：F；2）矩形型钢，也可简称为矩管，代号：J；3）圆形型钢，也可简称为圆管，代号：Y（或）。5截面、尺寸及允许偏差5.1方形型钢的截面图见图1，截面尺寸、允许偏差、截面面积、理论重量及截面特性应符合表1的规定。5.2矩形型钢的截面图见图2，截面尺寸、允许偏差、截面面积、理论重量及截面特性应符合表2的规定。1GB/T6728-20175.3圆形型钢的截面图见图3，截面尺寸、允许偏差、截面面积、理论重量及截面特性应符合表3的规定。5.4薄壁型钢的截面尺寸、截面面积、允许偏差、理论重量及截面特性可按GB50018的有关规定。5.5根据需方要求可提供表1、表2、表3所列尺寸以外的型钢，其尺寸允许偏差按表中相邻小尺寸的偏差规定执行。截面特性可按附录A计算。5.6型钢壁厚的允许偏差，当壁厚不大于10mm时不得超过公称壁厚的±10%。当壁厚大于10mm时为壁厚的±8%，弯角及焊缝区域壁厚除外。5.7型钢弯曲角度θ的偏差不得大于±1.5°，测量方法见图6。BYR0X-XtY说明：B——边长；t—壁厚；R——外圆弧半径。图1方形型钢表1方形型钢截面尺寸、允许偏差、截面面积、理论重量及截面特性边长mm尺寸允许偏差mm壁厚mm理论重量kg/m截面面积cm²惯性矩cm惯性半径cm截面模数cm²扭转常数B±4tMAI.=1rrw.wy1cmCcm20±0.501.21.51.752.00.6790.8260.9411.0500.8651.0521.1991.3400.4980.5830.6420.6920.7590.7440.7320.7200.4980.5830.6420.6920.8230.9851.1061.2150.750.880.981.0625±0.501.21.51.752.00.8671.0611.2151.3631.1051.3521.5481.7361.0251.2161.3571.4820.9630.9480.9360.9230.8200.9731.0861.1861.6551.9982.2612.5021.241.471.651.802GB/T6728-2017表1（续）边长mm尺寸允许偏差mm壁厚mm理论重量kg/m截面面积cm²惯性矩cm惯性半径cm截面模数cm扭转常数B±41MA1.=1rrywwy1cmCcm30±0.501.51.752.02.53.01.2961.4901.6772.0322.3611.6521.8982.1362.5893.0082.1952.4702.7213.1543.5001.1521.1401.1281.1031.0781.4631.6461.8142.1022.3333.5554.0484.5115.3476.0602.212.492.753.203.5840±0.501.51.752.02.53.04.01.7672.0392.3052.8173.3034.1982.5252.5982.9363.5894.2085.3475.4896.2376.9398.2139.32011.0641.5611.5491.5371.5121.4881.4382.7443.1183.4694.1064.6605.5328.72810.00911.23813.53915.62819.1524.134.695.236.217.078.4850±0.501.51.752.02.53.04.02.2382.5892.9333.6024.2455.4542.8523.2983.7364.5895.4086.94711.06512.64114.14616.94119.46323.7251.9691.9571.9451.9211.8971.8474.4265.0565.6586.7767.7859.49017.39520.02522.57827.43631.97240.0476.657.608.5110.2211.7714.4360±0.602.02.53.04.05.03.5604.3875.1876.7108.1294.5405.5896.6088.54710.35625.12030.34035.13043.53950.4682.3502.3292.3052.2562.2078.38010.11311.71014.51316.82239.81048.53956.89272.18885.56012.6015.2217.6521.9725.6170±0.652.53.04.05.05.1706.1297.9669.6996.5907.80810.14712.35649.40057.52272.10884.6022.7402.7142.6652.61614.10016.43420.60224.17278.50092.188117.975141.18321.2024.7431.1136.6580±0.702.53.04.05.05.9577.0719.22211.2697.5899.00811.74714.35675.14787.838111.031131.4143.1473.1223.0743.02518.78721.95927.75732.853118.52139.660179.808216.62828.2233.0241.8449.6890±0.753.04.05.06.08.01310.47812.83915.09710.20813.34716.35619.232127.277161.907192.903220.4203.5313.4823.4343.38528.28335.97942.86748.982201.108260.088314.896365.45242.5154.1764.7174.163GB/T6728-2017表1（续）边长mm尺寸允许偏差mm壁厚mm理论重量kg/m截面面积cm²惯性矩cm惯性半径cm截面模数cm扭转常数B±4tMAI.=1,rryw-wyIcmCcm100±0.804.05.06.011.73414.40916.98111.94718.35621.632226.337271.071311.4153.8913.8423.79445.26754.21462.283361.213438.986511.55868.1081.7294.12110±0.904.05.06.012.9915.9818.86616.54820.35624.033305.94367.95424.574.3004.2524.20355.62566.90077.194486.47593.60694.8583.63100.74116.47120±0.904.05.06.08.014.24617.54920.74926.84018.14722.35626.43234.191402.260485.441562.094696.6394.7084.6594.6114.51367.04380.90693.683116.106635.603776.632910.2811155.010100.75121.75141.22174.58130±1.004.05.06.08.015.50219.12022.63428.92119.74824.35628.83336.842516.97625.68726.64882.865.1175.0685.0204.89579.53496.258111.79135.82814.72998.221173.61502.1119.48144.77168.36209.54140±1.104.05.06.08.016.75820.68924.51731.86421.34726.35631.23240.591651.598790.523920.3591153.7355.5245.4765.4285.33153.085112.931131.479164.8191022.1761253.5651475.0201887.605139.8169.78197.9247.69150±1.204.05.06.08.018.01422.2626.40233.94522.94828.35633.63343.242807.82982.121145.91411.85.9335.8855.8375.714107.71130.95152.79188.251264.81554.11832.72364.1161.73196.79229.84289.03160±1.204.05.06.08.019.27023.82928.28536.88824.54730.35636.03246.991987.1521202.3171405.4081776.4966.3416.2936.2456.148123.394150.289175.676222.0621540.1341893.7872234.5732876.940185.25225.79264.18333.56170±1.304.05.06.08.020.52625.40030.17038.96926.14832.35638.43349.6421191.31453.31701.62118.26.7506.7026.6546.532140.15170.97200.18249.21855.82285.32701.03503.1210.37256.80300.91381.28180±1.404.05.06.08.021.80027.00032.10041.50027.7034.4040.8052.8014221737203725467.167.117.066.9415819322628322102724322341892372903404324GB/T6728-2017表1（续）边长mm尺寸允许偏差mm壁厚mm理论重量kg/m截面面积cm²惯性矩cm惯性半径cm截面模数cm扭转常数B±4tMA1.=1,rrw.wy1cmCcm²190±1.504.05.06.08.023.0028.5033.9044.0029.3036.4043.2056.0016802055241332087.577.527.477.351762162543192607321638074.958265325381486200±1.604.05.06.08.01024.3030.1035.8046.5057.0030.9038.4045.6059.2072.60196824102833356642517.977.937.887.767.6519724128335742530493763445958157072295362426544651220±1.805.06.08.0101233.239.651.563.273.542.450.465.680.693.7323838134828578264878.748.708.588.478.32294347439526590503859767815953311149442521668804922250±2.005.06.08.0101238.045.259.172.784.848.457.675.292.6108480556727229870798599.979.929.809.709.553844545786977897443884311598141971669157768187810621226280±2.205.06.08.0101242.750.966.682.196.154.464.884.8104.6122.56810805410317124791423211.211.111.010.910.848657573789110171051312504164362017323804730863111713561574300±2.406.08.0101254.771.688.410469.691.2113132996412801155191776712.011.811.711.66648531035118415434203122496629514997129315721829350±2.806.08.0101264.184.210412381.61071331561600820618251892905414.013.913.813.6915118214391660246833255740127475981372178721822552400±3.208.010121496.71201411631231531802083126938216443195041415.915.815.715.615641911221625214893460431718438273523622892339538775GB/T6728-2017表1（续）边长mm尺寸允许偏差mm壁厚mm理论重量kg/m截面面积cm²惯性矩cm惯性半径cm截面模数cm扭转常数B±4tMAI.=1,rryw.wy1.cmCcm450±3.608.01012141091351601851391732042364496655100641647321018.017.917.717.6199924492851325470043866291031501190003016370243574.989500±4.008.010121416122151179207235155193228264299621727634189187102010114.26020.019.919.819.719.6248730543568408045709648311947014242016453018614037504612544062417013注：表中理论重量按密度7.85g/cm计算。BYRXXY说明：H--长边；B—短边；1—-壁厚；R—-外圆弧半径。图2矩形型钢6GB/T6728-2017表2矩形型钢截面尺寸、允许偏差、截面面积、理论重量及截面特性边长mm尺寸允许偏差mm壁厚mm理论重量kg/m截面面积cm²惯性矩cm惯性半径cm截面模数cm扭转常数HB±4tMA11rr,W.W,1cmCcm3020±0.501.51.061.351.590.841.080.7881.060.841.831.401.751.221.551.770.931.070.7771.180.932.071.562.01.361.741.941.021.060.7651.291.022.291.712.51.642.092.211.151.030.7421.471.152.681.954020±0.501.51.301.653.271.101.410.8151.631.102.741.911.751.491.903.681.231.390.8041.841.233.112.142.01.682.144.051.341.380.7932.021.343.452.362.52.032.594.691.541.350.7702.351.544.062.723.02.363.015.211.681.320.7482.601.684.573.004025±0.501.51.411.803.821.841.461.0101.911.474.062.461.751.632.074.322.071.440.9992.161.664.632.782.01.832.344.772.281.430.9882.391.825.173.072.52.232.845.572.641.400.9652.792.116.153.593.02.603.316.242.941.370.9423.122.357.004.014030±0.501.51.531.954.382.811.501.1992.191.875.523.021.751.772.254.963.171.481.1872.482.116.313.422.01.992.545.493.511.471.1762.752.347.073.792.52.423.096.454.101.451.1533.232.748.474.463.02.833.617.274.601.421.1293.633.079.725.035025±0.501.51.652.106.652.251.781.042.661.805.523.411.751.902.427.552.541.761.0243.022.036.323.542.02.152.748.382.811.751.0133.352.257.063.922.52.622.349.893.281.720.9913.952.628.434.603.03.073.9111.173.671.690.9694.472.939.645.185030±0.501.51.7672.2527.5353.4151.8291.2313.0142.2767.5873.831.752.0392.5988.5663.8681.8151.2203.4262.5798.6824.352.02.3052.9369.5354.2911.8011.2083.8142.8619.7274.842.52.8173.58911.2965.0501.7741.1864.5183.36611.6665.723.03.3034.20612.8275.6961.7451.1635.1303.79713.4016.494.04.1985.34715.2396.6821.6881.1176.0954.45516.2447.777GB/T6728-2017表2（续）边长mm尺寸允许偏差mm壁厚mm理论重量kg/m截面面积cm²惯性矩cm惯性半径cm截面模数cm扭转常数HB±4tMA1.1,rryw.W,IcmCcm5040±0.501.52.0032.5529.3006.6021.9081.6083.7203.30112.2385.241.752.3142.94810.6037.5181.8961.5964.2413.75914.0595.972.02.6193.33611.8408.3481.8831.5854.7364.19215.8176.6732.53.2104.08914.1219.9761.8581.5625.6484.98819.2227.9653.03.7754.80816.14911.3821.8331.5396.4605.69122.3369.1234.04.8266.14819.49313.6771.7811.4927.7976.83927.8211.065525±0.501.51.7672.2528.4532.4601.9371.0453.0741.9686.2733.4581.752.0392.5989.6062.7791.9221.0343.49322237.1563.9162.02.3052.93610.6893.0731.9071.0233.8862.4597.9924.3425540±0.501.52.1212.70211.6747.1582.0781.6274.2453.57914.0175.7941.752.4523.12313.3298.1582.0651.6164.8474.07916.1756.6142.02.7763.53614.9049.1072.0521.6045.4194.55318.2087.3945550±0.601.752.7263.47315.81113.6602.1331.9835.7495.46423.1738.4152.03.0903.93617.71415.2982.1211.9716.4416.11926.1429.4336030±0.602.02.6203.33715.0465.0782.1231.2345.0153.38512.575.8812.53.2094.08917.9335.9982.0941.2115.9773.99815.0546.9813.03.7744.80820.4966.7942.0641.1886.8324.52917.3357.9504.04.8266.14724.6918.0452.0041.1438.2305.36321.1419.5236040±0.602.02.9343.73718.4129.8312.2201.6226.1374.91520.7028.1162.53.6024.58922.06911.7342.1921.5957.3565.86725.0459.7223.04.2455.40825.37413.4362.1661.5768.4586.71829.12111.1754.05.4516.94730.97416.2692.1111.53010.3248.13436.29813.6537050±0.602.03.5624.53731.47518.7582.6342.0338.9937.50337.45412.1963.05.1876.60844.04626.0992.5811.98712.58410.43953.42617.064.06.7108.54754.66332.2102.5281.94115.61812.88467.61321.1895.08.12910.35663.43537.1792.1711.89418.12114.87179.90824.6428040±0.702.03.5614.53637.35512.7202.8691.6749.3396.36130.88111.0042.54.3875.58945.10315.2552.8401.65211.2757.62737.46713.2833.05.1876.60852.24617.5522.8111.62913.0618.77643.68015.2834.06.7108.54764.78021.4742.7521.58516.19510.73754.78718.8445.08.12910.35675.08024.5672.6921.54018.77012.28364.11021.7448GB/T6728-2017表2（续）边长mm尺寸允许偏差mm壁厚mm理论重量kg/m截面面积cm²惯性矩cm惯性半径cm截面模数cm扭转常数HB±4tMA1.1rr,w.W,1.cmCcm8060±0.703.06.1297.80870.04244.8862.9952.39717.51014.96288.11124.1434.07.96610.14787.94556.1052.9432.35121.97618.701112.58330.3325.09.69912.356103.24765.6342.8902.30425.81121.878134.50335.6739040±0.753.05.6587.20870.48719.6103.1271.64915.6639.80551.19317.3394.07.3389.34787.89424.0773.0661.60419.53212.03864.32021.4415.08.91411.356102.48727.6513.0041.56022.77413.82575.42624.8199050±0.752.04.1905.33757.87823.3683.2932.09312.8629.34753.36615.8822.55.1726.58970.26328.2363.2662.07015.61411.29465.29919.2353.06.1297.80881.84532.7353.2372.04718.18713.09476.43322.3164.07.96610.147102.69640.6953.1812.00222.82116.27897.16227.9615.09.69912.356120.57047.3453.1231.95726.79318.938115.43636.7749055±0.752.04.3465.53661.7528.9573.3402.28713.73310.5362.72417.6012.55.3686.83975.04933.0653.3132.26416.67812.75176.87721.3579060±0.753.06.6008.40893.20349.7643.3292.43220.71116.588104.55227.391408.59410.947117.49962.3873.2762.38726.11120.795133.85234.5015.010.48413.356138.65373.2183.2222.31130.81124.406160.27340.7129550±0.752.04.3475.53766.08424.5213.4552.10413.9129.80857.45816.8042.55.3696.83980.30629.6473.2472.08216.90611.89570.32420.36410050±0.803.06.6908.408106.45136.0533.5582.07021.29014.42188.31125.0124.08.59410.947134.12444.9383.5002.02626.82417.975112.40931.355.010.48413.356158.15552.4293.4411.98131.63120.971133.75836.80412050±0.902.56.3508.089143.9736.7044.2192.13023.99514.68296.02626.0063.07.5439.608168.5842.6934.1892.10828.09717.077112.8730.31712060±0.903.08.01310.208189.11364.3984.3042.51131.58121.466156.02937.1384.010.47813.347240.72481.2354.2462.46640.12027.078200.40747.0485.012.83916.356286.94195.9684.1882.42247.82331.989240.86955.8466.015.09719.232327.950108.7164.1292.37754.65836.238277.36163.59712080±0.903.08.95511.408230.189123.4304.4913.28938.36430.857255.12850.7994.011.73411.947294.569157.2814.4393.24349.09439.320330.43864.9275.014.40918.356353.108187.7474.3853.19858.85046.936400.73577.7726.016.98121.632105.998214.9774.3323.15267.66653.744165.94083.3999GB/T6728-2017表2（续）边长mm尺寸允许偏差mm壁厚mm理论重量kg/m截面面积cm²惯性矩cm惯性半径cm截面模数cm扭转常数HB±4tMA11,rryw.W,IcmCcm²14080±1.004.012.99016.547429.582180.4075.0953.30161.36845.101410.71376.4785.015.97920.356517.023215.9145.0393.25673.86053.978498.81591.8346.018.86524.032569.935247.9054.9833.21185.27661.976580.919105.83150100±1.204.014.87418.947594.585318.5515.6014.11079.27863.710660.613104.945.018.33423.356719.164383.9885.5494.05495.88879.797806.733126.816.021.69127.632834.615444.1355.4954.009111.28288.827915.022147.078.028.09635.7911039.101519.3085.3883.917138.546109.8611147.710181.8516060±1.2039.89812.608389.8683.9155.5612.58048.73227.972228.1550.144.514.49818.469552.08116.665.4682.51369.0138.886324.9670.08516080±1.204.014.21618.117597.691203.5325.7383.34871.71150.883493.12988.0315.017.51922.356721.650214.0895.6813.30490.20661.020599.175105.96.020.74926.433835.936286.8325.6233.259104.19276.208698.881122.278.026.81033.6441036.485343.5995.5053.170129.56085.899876.599149.5418065±1.203.011.07514.108550.35111.786.2462.81561.1534.393306.7561.8494.516.26420.719784.13156.476.1522.74887.12548.144438.9186.993180100±1.304.016.75821.317926.020373.8796.5864.184102.89174.755852.708127.065.020.68926.3561124.156451.7386.5304.140124.90690.3471012.589153.886.024.51731.2321309.527523.7676.4754.095145.503104.7531222.933178.888.031.86140.3911643.149651.1326.3624.002182.572130.2261554.606222.492004.018.01422.9411199.680410.2617.2304.230119.96882.152984.151141.815.022.25928.3561459.270496.9057.1734.186145.92099.3811203.878171.946.026.10133.6321703.224576.8557.1164.141170.322115.3711412.986200.18.034.37643.7912145.993719.0147.0004.052214.599143.8021798.551249.6200120±1.404.019.324.513536187.435.0213510313451725.023.830.416497507.374.9716512516522106.028.336.019298747.324.9319314619472458.036.546.4238610797.174.822391802507308200150±1.504.021.226.9158410217.676.1615813619422195.026.233.4193512457.626.1119316623912676.031.139.6226814577.566.0622719428263128.040.251.2289218157.435.95283242366439610GB/T6728-2017表2（续）边长mm尺寸允许偏差mm壁厚mm理论重量kg/m截面面积cm²惯性矩cm惯性半径cm截面模数cm扭转常数HB±4tMA1.1rr,w.w,1.cmCcm²220140±1.504.021.827.718929488.265.8417213519872245.027.034.4231311558.215.8021016524472746.032.140.8271413528.155.7524719328913218.041.552.8338916858.015.653082413746407250150±1.604.024.330.9269712349.346.3221616526652755.030.138.4330415089.286.2726420132853376.035.845.6388617689.236.2331123638863968.046.559.2488622199.086.123912965050504260180±1.805.033.242.4412123509.867.4531726146954266.039.650.4485627639.817.4037430755665018.051.565.6614534939.687.2947338872676421063.280.6736341749.567.205666468850772300200±2.005.038.048.46241336111.48.3441633668365526.045.257.67370396211.38.2949139681156518.059.175.29389504211.28.19626504106278381072.792.611313605811.18.09754606129871012350250±2.205.045.858.410520630613.410.4601504122348176.054.769.612457745813.410.3712594145549678.071.691.216001957313.210.29147661913612531088.4113194071158813.110.11109927235001522400200±2.405.045.858.412490431114.68.60624431105197426.054.769.614789509214.58.55739509120698778.071.691.218974651714.48.459496521582011331088.411323003786414.38.3611507861936813731210413226248897714.18.241312898227821591400250±2.605.049.763.414440705615.110.6722565147739376.059.475.617118835215.010.58566681758011108.077.999.2220481074414.910.411028602312714401096.2122268061302914.810.31340104228423175312113144307661492614.610.21538119733597204211GB/T6728-2017表2（续）边长mm尺寸允许偏差mm壁厚mm理论重量kg/m截面面积cm²惯性矩cm惯性半径cm截面模数cm扭转常数HB±4LMA1.1,rryw.W,1.cmC.cm450250±2.806.064.181.622724924516.710.610107402068712538.084.2107293361191616.510.5130495327222162810104133357371447016.410.41588115833473198312123156411371666316.210.318281333395912314500300±3.206.073.593.6330121515118.812.7132110103242016888.096.7123428051962418.612.61712130842767220210120153523282393318.512.52093159652736269312141180606042772618.312.424241848625813156550350±3.608.0109139597833004020.714.72174171763051285610135173732763675220.614.62665210077901350312160204852494276920.414.53100244492646411814185236972694873120.314.4353727841067604710600400±4.008.0122155806704356422.816.82689217888672359110151193990815342922.716.7330326721097204.413121792281156706239122.516.5385631201306805201142072641323107128222.416.4441035641508505962162352991482107976022.316.3494039881705106694注：表中理论重量按密度7.85g/cm计算。DYXXV说明：D--外径；1—-壁厚。图3圆形型钢12GB/T6728-2017表3圆形型钢截面尺寸、允许偏差、截面面积、理论重量及截面特性外径D允许偏差±4壁厚t理论重量M截面面积A惯性矩I惯性半径R弹性模数z塑性模数s扭转常数单位长度表面积AJCmmmmmmkg/mcm²cmcmcmcmcmcmm²21.3（21.3）±0.51.21.51.752.02.53.00.590.730.840.951.161.350.760.931.071.211.481.720.380.460.520.570.660.740.7120.7020.6940.6860.6710.6550.360.430.490.540.620.700.490.590.670.750.891.010.770.921.041.141.331.480.720.860.971.071.251.390.0670.0670.0670.0670.0670.06726.8（26.9）±0.51.21.51.752.02.53.00.760.941.081.221.501.760.971.191.381.561.912.240.790.961.091.211.421.610.9060.8960.8880.8790.8640.8480.590.710.810.901.061.200.790.961.11.231.481.711.581.912.172.412.853.231.181.431.621.82.122.410.0840.0840.0840.0840.0840.08433.5（33.7）±0.51.52.02.53.03.54.01.181.551.912.262.592.911.511.982.432.873.293.711.932.462.943.373.764.111.1321.1161.0991.0841.0681.0531.151.471.762.012.242.451.541.992.412.803.163.503.874.935.896.757.528.212.312.943.514.034.494.900.1050.1050.1050.1050.1050.10542.3（42.4）±0.51.52.02.53.04.01.511.992.452.913.781.922.533.133.74.814.015.156.217.198.921.4431.4271.4101.3941.3611.892.442.943.404.222.503.253.974.645.898.0110.3112.4314.3917.843.794.875.886.808.440.1330.1330.1330.1330.13348（48.3）±0.51.52.02.53.04.05.01.722.272.813.334.345.302.192.893.574.245.536.755.937.669.2810.7813.4915.821.6451.6281.6111.5941.5621.5302.473.193.864.495.626.593.244.235.186.087.779.2911.8615.3218.5521.5726.9831.654.946.387.738.9811.2413.180.1510.1510.1510.1510.1510.15160（60.3）±0.62.02.53.04.05.02.863.554.225.526.783.644.525.377.048.6415.3418.7021.8827.7332.942.0522.0352.0181.9851.9535.116.237.299.2410.986.738.279.7612.5615.1730.6837.443.7655.4565.8810.2312.4714.5818.4821.960.1880.1880.1880.1880.18875.5（76.1）±0.762.53.04.05.04.505.367.058.695.736.838.9811.0738.2444.9757.5969.152.5822.5652.5312.49910.1311.9115.2618.3213.3315.7820.4724.8976.4789.94115.19138.2920.2623.8230.5136.630.2370.2370.2370.23713GB/T6728-2017表3（续）外径D允许偏差±4壁厚t理论重量M截面面积A惯性矩I惯性半径R弹性模数Z塑性模数S扭转常数单位长度表面积AJCmmmmmmkg/mcm²cmcmcmcmcmcmm²88.5（88.9）±0.903.04.05.06.06.338.3410.3012.218.0610.6213.1215.5573.7394.99114.72133.003.0252.9912.9572.92516.6621.4625.9330.0621.9428.5834.940.91147.45189.97229.44266.0133.3242.9351.8560.110.2780.2780.2780.278114（114.3）±1.154.05.06.010.8513.4415.9813.8217.1220.36209.35254.81297.733.8923.8583.82436.7344.752.2348.4259.4570.06418.7509.61595.4673.4689.41104.470.3580.3580.358140（139.7）±1.404.05.06.013.4216.6519.8317.0921.2125.26395.47483.76568.034.8104.7764.74256.5069.1185.1574.0191.17107.81790.94967.521136.13112.99138.22162.300.4400.4400.440165（168.3）±1.65456815.8819.7323.5330.9720.2325.1329.9739.46655.94805.04948.471218.925.695.665.635.5679.5197.58114.97147.75103.71128.04151.76197.361311.891610.071896.932437.84159.02195.16229.93295.500.5180.5180.5180.518219.1（219.1）±2.205681026.431.5341.651.633.640.1753.165.719282282296035987.577.547.477.4017620827032822927335743838564564591971973524175406570.6880.6880.6880.688273（273）±2.755681033.039.552.364.942.150.366.682.637814487585271549.489.449.379.3127732942952435942856269275628974117001431055465785710480.8580.8580.8580.858325（323.9）±3.25568101239.547.262.577.792.650.360.179.7991186436765110014122871447211.3211.2811.2111.1411.07396471616756891512611804993117612871153032002824573289437929421232151217811.201.201.201.201.20355.6（355.6）±3.5568101251.768.685.2101.765.987.41091301007113200162201914012.412.312.212.25667429121076733967119514172014126400324503827911331485182521531.121.121.121.12406.4（406.4）±4.108101278.697.8116.710012514919870244802893714.114.014.0978120514241270157218673975048950578741956240928481.281.281.2814GB/T6728-2017表3（续）外径D允许偏差±4壁厚t理论重量M截面面积A惯性矩I惯性半径R弹性模数Z塑性模数s扭转常数单位长度表面积AJCmmmmmmkg/mcm²cmcmcmcmcmcmm²457（457）±4.68101288.6110131.7113140168284503509041.55615.915.815.71245153618191613199823775689070180831132490307136371.441.441.44508（508）±5.108101298.6123146.812615618739280485205753617.717.617.515461910226520002480295378560970401150723093362145301.601.601.60610±6.1081012.516118.8148184.2234.4151189235299685528484710475513178221.321.221.121.02248278134354321289936004463564713710316969420951026356344955564686986411.921.921.921.92注：括号内为ISO4019所列规格。5.8型钢的弯角外圆弧半径R（或CC值应符合表4的规定。R（或CC值的测量方法按图4规定或用圆角规进行测量。表4外圆弧半径R（或CC）值厚度1/mm碳素钢（R≤320MPa）低合金钢（R>320MPa）≤3（1.0~2.5）t（1.5~2.5）t3（1.5~2.5）（2.0~3.0)6（2.0~3.0）t（2.0~3.5）t>10（2.0~3.5）t（2.5~4.0)t注：R值指标准中规定的最低值。15GB/T6728-2017RC说明：R——弯角外圆弧半径；CC-弯角区域长度。图4方形或矩形冷弯空心型钢的外角剖面5.9型钢截面的平面部分凸凹度X、X，应不超过该边长的0.6%，但最小值为0.4mm。测量方法如图5所示。XH6X2ABXXX2A放大B放大说明：CC弯角区域长度；XX-平面部分凸凹度；B--方形型钢边长，或矩形型钢短边长；H--矩形型钢长边长。图5方形或矩形型钢平面凸/凹度的测量16R尚CX2XA放大咨OA放大A/X2BA放大B放大SACGB/T6728-2017图6弯曲角度5.10型钢尺寸应在距离端部不小于100mm处测量。6长度及允许偏差6.1型钢通常交货长度为4000mm~12000mm。经供需双方协商，可供应其他长度的型钢。6.2型钢按定尺或倍尺长度交货时，应在合同中注明。其长度允许偏差应符合表5的规定，合同中未注明定尺精度时按普通定尺交货。表5定尺长度及允许偏差单位为毫米定尺精度长度允许偏差普通定尺4000~12000+500精确定尺4000~6000+50>6000~12000+1006.3型钢允许交付不小于2000mm的短尺和非定尺，也可以接口管形式交货，但需方在使用时将接口管切除。短尺和非定尺管重量应不超过总交货量的5%，对于理论重量大于20kg/m的型钢应不超过总交货量的10%。7外形7.1型钢弯曲度每米不得大于2mm，总弯曲度不得大于总长度的0.15%。测量方法见图7。17GB/T6728-2017L说明：L——长度；e—弯曲度。图7弯曲度偏差的测定7.2经供需双方协商并在合同中注明，可测量冷弯型钢的扭转度，测量时应在平台上进行。测量方法按照图8所示，所测值应小于V值并按式（1）计算：V=2+L×0.5/1000（1）式中：L—-长度，单位为毫米（mm）；V—扭转度，单位为毫米（mm）。说明：V—-扭转度。图8方型或矩形型钢的扭曲7.3型钢的端部应切得正直，其锯切斜度不得大于表6的规定。由切断方法造成的较小变形和毛刺允许存在。表6锯切斜度的规定单位为毫米边长（外径）锯切斜度应小于边长（外径）≤10021004300618GB/T6728-20178重量及允许偏差型钢通常以实际重量交货。当以理论重量交货时，型钢的实际重量与理论重量的允许偏差为。9技术要求9.1型钢的牌号和化学成分（熔炼分析）、力学性能、表面质量、焊缝质量等应符合GB/T6725的规定。9.2对于镀锌型钢，镀锌层内外表面镀锌层单位面积总重量宜不小于200g/m。锌层重量、均匀性的检验方法可按GB/T3091。10标记示例用GB/T700中规定的碳素结构钢Q235制造的尺寸为150mm×100mmX6mm冷弯矩形空心型钢的标记为：J150×100X6-GB/T6728-2017冷弯空心型钢（矩形管Q235-GB/T70019GB/T6728-2017附录A（资料性附录）计算截面特性的公式第5章中的表1、表2、表3给出了冷弯方、矩、圆空心型钢标准尺寸范围内的公称截面特性，其他尺寸和厚度的结构用冷弯圆、方、矩空心型钢的公称截面特性可按表A.1和表A.2中公式计算。表A.1圆形空心型钢项目符号单位计算公式公称外圆直径Dmm一公称厚度tmm公称内圆直径dmmd=D-2t每米长度的表面积Am²/mAs=πD/10截面面积Acm²A=（D2-d）/（4×10）单位长度的重量Mkg/mM=0.785×A惯性矩IcmI=π（D-d/（64×10)回转半径RcmR=（I/A）1/2弹性模数ZcmZ=（2I×10)/D塑性模数ScmS=（D-d)/（6X10）扭转惯量JcmJ=2I扭转模数ccmC=2Z表A.2方、矩形空心型钢项目符号单位计算公式短侧面公称长度Bmm一长侧面公称长度Hmm一公称厚度tmm一公称外角半径Rmm当≤6mmR=2.0t当610mmR=3.0t公称内角半径rmmr=R-t单位长度的重量Mkg/mM=0.785A截面面积Acm²A=[2t（B+H-2t）-（4一）（R-）]/10²每米长度的表面积A,m/mA.=2（H+B-4R十πR）20GB/T6728-2017表A.2（续）项目符号单位计算公式面积的二次惯性矩长轴（主轴）Lcm1.=1/10[BH/12-（B-2t）（H-2t）/12-4（I.十Ah）十4（I.+Ah)]式中：1.=[1/3一π/16-1/3（12-3π）]RA.=（1一π/4）R²h。=H/2-[（10-3π）/（12-3π）]R（求1，时用“B”代替“H”）I.=[1/3一π/16-1/3（12-3）]A=（1—π/4）r²h.=（H-2t）/2-[（10-3π）/（12-3）]（求1，时用“B”代替“H”）短轴（次轴）1cm1,=1/10[HB/12-（H-2t）（B-2t）/12-4（I.+A.h）+4（I.+Ah]回转半径rcmr=（L/A）1/2r,cmr=（I/A）1/2弹性截面模数w.cmW.=10（2I./H）W,cmW=10（21,/B）扭转惯量IcmI.=1/10（txh/3+2KA）扭转模数ccm²C.=10[1./（t十K/]式中：h=2[（B-t）十（H-1）]-2R（4-元）其中R=（R十r）/2A=（B-t）H-t）-R（4一π）K=2At/h21GB/T6728-2017参考文献[1]GB/T3091低压流体输送用焊接钢管[2]GB50018冷弯薄壁型钢结构技术规范22
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