DB13(J)∕T 277-2018 建筑用钢型材标准

DB河北省工程建设标准建筑用钢型材标准河北省住房和城乡建设厅发布 12术语和符号 2 2 23材料 5 5 8 4热轧型钢 5冷弯空心型钢 23 23 276焊接空心型钢 30 30 30 35附录A计算截面特性的公式 44本标准用词说明 46引用标准名录 47附：条文说明 481GeneralProvisions 12TermsandSymbols 2 2 23Materials 5 5 83.3AtmosphericCor 4HotRolledSectionSteel 5ColdFormingHollowSectionalSteel 23 23 276WeldedHollowSectionalSteel 30 30 30 35AppendixAFormulaforCalculatingCross-sectionalExplanationofWordinginThisStandard 46ListofQuotedStandards 47Addition：ExplanationofProvisions 481.0.1为了促进河北省钢结构工业化、标准化发展，推进装配式建筑的发展，积极推进我省钢结构建筑的现代化，提升钢结构技术集成配套，节约资源，保护环境，制定本标准。1.0.2本标准规定了建筑用钢型材的材料要求、截面尺寸，以及订货、偏差控制等。本标准适用于建筑结构用的热轧型钢、冷弯空心型钢、焊接空心型钢的工厂生产和设计选用。1.0.3建筑用钢型材的工厂生产和设计选用除应符合本标准外，尚应符合国家和河北省现行有关标准的规定。22.1术语2.1.1建筑用钢型材steelextrudateforbuildings在房屋建筑中使用的，通过轧制、冷弯、焊接等工艺制成的具有一定几何形状的钢构件。2.1.2热轧型钢hotrolledsectionsteel用加热钢坯轧成的各种几何断面形状的钢材，本标准中分为热轧H型钢和热轧无缝钢管。2.1.3冷弯空心型钢coldforminghollowsectionalsteel用钢板或钢带在连续辊式冷弯机组上生产成型，再焊接接缝而成的空心型钢，本标准中分为圆形、矩形和方形等冷弯空心型钢。2.1.4焊接空心型钢theweldedhollowsectionalsteel用钢板或钢管焊接而成的空心型钢，本标准中分为矩形（含方形）、日字形、田字形、L形、T形、十字形等空心型钢。2.1.5耐候钢atmosphericcorrosionresistingsteel通过添加少量的合金元素如Cu、P、Cr、Ni等，使其在金属基体表面上形成保护层，以提高耐大气腐蚀性能的钢。2.2符号2.2.1热轧型钢的几何参数H1——H型钢截面高度；B1——H型钢截面宽度；tw——H型钢腹板厚度；tf——H型钢翼缘厚度；r1——H型钢圆角半径；D1——热轧无缝钢管的外直径；t1——热轧无缝钢管的壁厚。2.2.2冷弯空心型钢的几何参数H——冷弯矩形空心型钢的长边尺寸；B——冷弯矩形空心型钢的短边尺寸或冷弯方形空心型钢的边长；t——冷弯空心型钢的壁厚；R——冷弯矩形、方形空心型钢的外圆弧半径；D——冷弯圆形空心型钢的外直径。2.2.3焊接空心型钢的几何参数H2——焊接矩形空心型钢的长边尺寸；B2——焊接矩形空心型钢的短边尺寸；t2——焊接矩形空心型钢的壁厚；H3——焊接L形空心型钢的单肢长度；B3——焊接L形空心型钢的肢宽；t3——焊接L形空心型钢的壁厚；4H4——焊接T形空心型钢的腹板高；L4——焊接T形空心型钢的翼缘长；B4——焊接T形空心型钢的肢宽；t4——焊接T形空心型钢的壁厚；H5——焊接日字形空心型钢的长边尺寸；B5——焊接日字形空心型钢的短边尺寸；t5——焊接日字形空心型钢的外壁厚；t5n——焊接日字形空心型钢的内壁厚；B6——焊接田字形空心型钢的边长；t6——焊接田字形空心型钢的外壁厚；t6n——焊接田字形空心型钢的内隔板壁厚；H7——焊接十字形空心型钢的单向总长度；B7——焊接十字形空心型钢的肢宽；t7——焊接十字形空心型钢的壁厚。3.1一般规定3.1.1建筑用钢型材的选用应遵循技术可靠、经济合理的原则，综合考虑建筑结构的重要性、荷载特征、结构形式、应力状态、连接方法、工作环境、钢材厚度和价格等因素，选用合适的钢材牌号和材性保证项目。设计文件中应完整地注明对钢材的技术要求。3.1.2承重结构所用的钢材应具有屈服强度、抗拉强度、断后伸长率和硫、磷含量的合格保证，对焊接结构尚应具有碳当量的合格保证。焊接承重结构以及重要的非焊接承重结构采用的钢材应具有冷弯试验的合格保证；对直接承受动力荷载或需验算疲劳的构件所用钢材尚应具有冲击韧性的合格保证。3.1.3采用塑性设计的结构及进行弯矩调幅的构件，所采用的钢材应符合下列规定：1屈强比不应大于0.85；2钢材应有明显的屈服台阶，且伸长率不应小于20%。3.1.4建筑用钢型材宜采用Q235、Q345、Q355、Q390、Q420、Q460和Q345GJ钢，其质量除应符合本标准规定外，尚应符合现行国家标准《碳素结构钢》GB/T700、《低合金高强度结构钢》GB/T1591、《建筑结构用钢板》GB/T19879和《结构用无缝钢管》GB/T8162的规定。63.1.5处于外露环境，且对耐腐蚀有特殊要求或处于侵蚀性介质环境中的承重结构，可采用Q235NH、Q355NH和Q415NH牌号的耐候结构钢，其质量应符合现行国家标准《耐候结构钢》GB/T4171的规定。3.1.6高层建筑的外露承重钢结构可选用Q235NH、Q355NH或Q415NH等牌号的焊接耐候钢，其材质和材料性能要求应符合现行国家标准《耐候结构钢》GB/T4171的规定，并宜附加要求保证晶粒度不小于7级，耐腐蚀指数不小于6.0。3.1.7焊接结构所用钢材尚应具有良好的焊接性能，其碳当量或焊接裂纹敏感性指数应符合设计要求或相关标准的规定。3.1.8建筑用钢型材焊接材料的选用应符合下列规定：1焊条或焊丝的型号和性能应与相应母材的性能相适应，其熔敷金属的力学性能应符合设计规定，且不应低于相应母材标准的下限值。2焊条的材质和性能应符合现行国家标准《非合金钢及细晶粒钢焊条》GB/T5117、《热强钢焊条》GB/T5118的有关规定。对直接承受动力荷载或需要验算疲劳的结构，以及低温环境下工作的厚板结构，宜采用低氢型焊条。3焊丝的材质和性能应符合现行国家标准《熔化焊用钢丝》GB/T14957、《气体保护电弧焊用碳钢、低合金钢焊丝》GB/T8110、《碳钢药芯焊丝》GB/T10045及《低合金钢药芯焊丝》GB/T17493的有关规定。4埋弧焊用焊丝和焊剂的材质和性能应符合现行国家标准《埋弧焊用碳钢焊丝和焊剂》GB/T5293、《埋弧焊用低合金钢焊丝和焊剂》GB/T12470的有关规定。3.1.9高层民用建筑中按抗震设计的框架梁、柱和抗侧力支撑等主要抗侧力构件，其钢材性能要求尚应符合下列规定：1钢材抗拉性能应有明显的屈服台阶，其断后伸长率不应小于20%。2钢材屈服强度波动范围不应大于120N/mm2，钢材实物的实测屈强比不应大于0.85。3抗震等级为三级及以上的高层民用建筑钢结构，其主要抗侧力构件所用钢材应具有与其工作温度相应的冲击韧性合格保证。4偏心支撑框架中的消能梁段所用钢材的屈服强度不应大于345N/mm2，屈强比不应大于0.8；且屈服强度波动范围不应大于100N/mm2。3.1.10钢材质量等级的选用应符合下列规定：1A级钢仅可用于结构工作温度高于0℃的不需要验算疲劳的结构，且Q235A钢不宜用于焊接结构。高层钢结构选用Q235A或Q235B级钢时应选用镇静钢。2需验算疲劳的焊接结构用钢材应符合下列规定：1）当工作温度高于0℃时其质量等级不应低于B级；2）当工作温度不高于0℃但高于-20℃时，Q235、Q345钢不应低于C级，Q390、Q420及Q460钢不应低于D级；3）当工作温度不高于-20℃时，Q235、Q345钢不应低于D级，Q390、Q420及Q460钢应选用E级。83需验算疲劳的非焊接结构，其钢材质量等级要求可较上述焊接结构降低一级但不应低于B级。但对吊车起重量不小于50t的中级工作制吊车梁，其质量等级要求不能降低。4工作温度不高于-20℃的受拉构件及承重构件的受拉板材的厚度或直径小于40mm时，质量等级不低于C级；当其厚度或直径不小于40mm时，质量等级不低于D级；重要承重结构的受拉板材宜满足现行国家标准《建筑结构用钢板》GB/T19879的要求。3.1.11建筑用钢型材的壁厚允许偏差，当壁厚不大于10mm时不得超过公称壁厚的±4%，当壁厚大于10mm时不得超过壁厚的±3%，弯角及焊缝区域壁厚除外。3.2钢材化学成分和设计指标3.2.1Q235钢的化学成分应符合表3.2.1的规定。牌号质量等级化学成分（质量分数）/%，≤CMnPSQ235A0.220.350.0450.050B0.200.350.0450.045C0.350.0400.040D0.350.0350.03593.2.2Q345钢的化学成分应符合表3.2.2的规定。牌号质量等级化学成分（质量分数）/%，CMnPSNbVTiCrNiCuNMoBAls不大于不小于Q345A0.200.500.0350.0350.070.200.300.500.300.012--B0.200.0350.035-C0.200.0300.0300.015D0.0300.0250.015E0.0250.0200.0153.2.3Q355、Q390、Q420、Q460热轧钢的化学成分应符合表3.2.3-1的规定，其碳当量应符合表3.2.3-2的规定。牌号化学成分（质量分数）/%钢级质量等级CMnPSNbVTiCrNiCuNMoB以下公称厚度或直径/mm不大于≤40>40不大于Q355B0.240.500.0350.035---0.300.300.400.012--C0.200.220.0300.0300.012D0.200.220.0250.025-牌号化学成分（质量分数）/%钢级质量等级CMnPSNbVTiCrNiCuNMoB以下公称厚度或直径/mm不大于≤40>40不大于Q390B0.200.500.0350.0350.050.050.300.500.400.015-C0.0300.030D0.0250.025Q420B0.200.500.0350.0350.050.050.300.800.400.0150.20-C0.0300.030Q460C0.200.500.0300.0300.050.050.300.800.400.0150.200.004公称厚度大于100mm的型钢，碳含量可由供需双方协商确定。公称厚度大于30mm的钢材，碳含量不大于0.22%。仅适用于型钢和棒材。Q390、Q420最高可到0.07%，Q460最高可到0.11%。最高可到0.20%。如果钢中酸溶铝Als含量不小于0.015%或全铝Alt含量不小于0.020%，或添加了其他固氮合金元素，氮元素含量不作限制，固氮元素应在质量证明书中注明。牌号碳当量CEV（质量分数）/%不大于钢级质量等级公称厚度或直径/mm≤30>30～63>63～150>150～250>250～400牌号碳当量CEV（质量分数）/%不大于钢级质量等级公称厚度或直径/mm≤30>30～63>63～150>150～250>250～400Q355B0.450.470.470.49-C-D0.49Q390B0.450.470.48--CDQ420B0.450.470.480.49-CQ460C0.470.490.49--当需对硅含量控制时（例如热浸镀锌涂层），为达到抗拉强度要求而增加其他元素如碳和锰的含量，表中最大碳当量值的增加应符合下列规定：对于Si≤0.030%，碳当量可提高0.02%；对于Si≤0.25%，碳当量可提高0.01%。只适用于型钢和棒材。只适用于质量等级为D的钢板。3.2.4钢材的设计用强度指标，应根据钢材牌号、厚度或直径按表3.2.4采用。采用Q355钢时，需满足相应规范标准要求。钢材牌号钢材厚度或直径（mm）强度设计值屈服强度fy抗拉强度fu抗拉、抗压、抗弯f抗剪f端面承压（刨平顶紧）fce碳素结构钢Q235≤16215320235370>16,≤40205225>40,≤100200215低合金高强度结构钢Q345≤16305400345470>16,≤40295335>40,≤63290325>63,≤80280315>80,≤100270305钢材牌号钢材厚度或直径（mm）强度设计值屈服强度fy抗拉强度fu抗拉、抗压、抗弯f抗剪f端面承压（刨平顶紧）fce低合金高强度结构钢Q390≤16345200415390490>16,≤40330370>40,≤63310350>63,≤100295330Q420≤16375215440420520>16,≤40355205400>40,≤63320380>63,≤100305360Q460≤16410235470460550>16,≤40390225440>40,≤63355205420>63,≤100340400建筑结构用钢板Q345GJ>16,≤50325415345490>50,≤100300335注：1表中直径指实芯棒材直径，厚度系指计算点的钢材或钢管壁厚度，对轴心受拉和轴心受压构件系指截面中较厚板件的厚度；2冷弯型材和冷弯钢管，其强度设计值应按国家现行有关标准的规定采用。3.2.5结构用无缝钢管的强度指标应按表3.2.5采用。钢管钢材牌号壁厚（mm）强度设计值屈服强度fy抗拉强度fu抗拉、抗压和抗弯f抗剪f端面承压（刨平顶紧）fQ235≤16215320235375钢管钢材牌号壁厚（mm）强度设计值屈服强度fy抗拉强度fu抗拉、抗压和抗弯f抗剪f端面承压（刨平顶紧）fQ235>16,≤30205320225375>30215Q345≤16305400345470>16,≤30290325>30260295Q390≤16345200415390490>16,≤30330370>30310350Q420≤16375220445420520>16,≤30355205400>30340380Q460≤16410240470460550>16,≤30390225440>303552054203.2.6焊缝的强度指标应按表3.2.6采用并应符合下列规定：1手工焊用焊条、自动焊和半自动焊所采用的焊丝和焊剂，应保证其熔敷金属的力学性能不低于母材的性能。2焊缝质量等级应符合现行国家标准《钢结构焊接规范》GB50661的规定，其检验方法应符合现行国家标准《钢结构工程施工质量验收规范》GB50205的规定。其中厚度小于6mm钢材的对接焊缝，不应采用超声波探伤确定焊缝质量等级。3对接焊缝在受压区的抗弯强度设计值取fcw，在受拉区的抗弯强度设计值取ftw。4计算下列情况的连接时，表3.2.6规定的强度设计值应乘以相应的折减系数；几种情况同时存在时，其折减系数应连乘：1）施工条件较差的高空安装焊缝应乘以系数0.9；2）进行无垫板的单面施焊对接焊缝的连接计算应乘折减系数0.85。焊接方法和焊条型号构件钢材对接焊缝强度设计值角焊缝强度设计值对接焊缝抗拉强度f角焊缝抗拉、抗压和抗剪强度f牌号厚度或直径（mm）抗压f焊缝质量为下列等级时，抗拉f抗剪f抗拉、抗压和抗剪f二级三级自动焊、半自动焊和E43型焊条手工焊Q235≤16215215415240>16,≤40205205>40,≤100200200自动焊、半自动焊和E50、E55型焊条手工焊Q345≤16305305260200480(E50)540(E55)280(E50)(E55)>16,≤40295295250>40,≤63290290245>63,≤80280280240>80,≤100270270230Q345GJ>16,≤35310310265>35,≤50290290245>50,≤100285285240Q390≤16345345295200200(E50)220(E55)>16,≤40330330280>40,≤63310310265>63,≤100295295250自动焊、半自动焊和E55、E60型焊条手工焊Q420≤16375375320215220(E55)240(E60)540(E55)590(E60)315(E55)340(E60)>16,≤40355355300205>40,≤63320320270>63,≤100305305260Q460≤16410410350235>16,≤40390390330225>40,≤63355355300205>63,≤100340340290注：表中厚度系指计算点的钢材厚度，对轴心受拉和轴心受压构件系指截面中较厚板件的厚度。3.2.7钢材的物理性能指标应按表3.2.7采用。弹性模量E（N/mm）剪变模量G（N/mm）线膨胀系数α（以每℃计）质量密度P（kg/m）206×1078503.3耐候钢3.3.1耐候钢各牌号的分类见表3.3.1。类别牌号生产方式高耐候钢Q295GNH、Q355GNH热轧Q265GNH、Q310GNH冷轧焊接耐候钢Q235NH、Q295NH、Q355NHQ415NH、Q460NH、Q500NHQ550NH热轧3.3.2耐候钢的化学成分应符合表3.3.2的规定。牌号化学成分（质量分数）/%CMnPSCuCrNi其他元素Q265GNH0.10~0.400.20~0.500.07~0.12≤0.0200.20~0.450.30~0.650.25~0.50Q295GNH0.10~0.400.20~0.500.07~0.12≤0.0200.25~0.450.30~0.650.25~0.50Q310GNH0.25~0.750.20~0.500.07~0.12≤0.0200.20~0.500.30~1.25≤0.65Q355GNH0.20~0.75≤1.000.07~0.15≤0.0200.25~0.550.30~1.25≤0.65Q235NH≤0.130.10~0.400.20~0.60≤0.030≤0.0300.25~0.550.40~0.80≤0.65Q295NH0.10~0.500.30~1.00≤0.030≤0.0300.25~0.550.40~0.80≤0.65Q355NH≤0.500.50~1.50≤0.030≤0.0300.25~0.550.40~0.80≤0.65Q415NH≤0.65≤0.025≤0.0300.20~0.550.30~1.250.12~0.65牌号化学成分（质量分数）/%CMnPSCuCrNi其他元素Q460NH≤0.65≤1.50≤0.025≤0.0300.20~0.550.30~1.250.12~0.65Q500NH≤0.65≤2.0≤0.025≤0.0300.20~0.550.30~1.250.12~0.65Q550NH≤0.65≤2.0≤0.025≤0.0300.20~0.550.30~1.250.12~0.65为了改善钢的性能，可以添加一种或一种以上的微量合金元素：Nb0.015%~0.060%，V0.02%~0.12%，Ti0.02%~0.10%，Alt≥0.020%。若上述元素组合使用时，应至少保证其中一种元素含量达到上述化学成分的下限规定。可以添加下列合金元素：Mo≤0.03%，Zr≤0.15%。Nb、V、Ti等三种合金元素的添加总量不应超过0.22%。供需双方协商，S的含量可以不大于0.008%。供需双方协商，Ni含量的下限可不做要求。供需双方协商，C的含量可以不大于0.15%。3.3.3耐候钢材的力学性能和工艺性能应符合表3.3.3的规定。牌号拉伸试验180º弯曲试验弯心直径下屈服强度R/(N/mm)不小于抗拉强度R(N/mm)断后伸长率A/%不小于≤16≤40>40,≤60>60≤16≤40>40,≤60>60>6,≤16>16Q235NH235225215215360~51025252423tt2tQ295NH295285275255430~56024242322t2t3tQ295GNH295285430~5602424t2t3tQ355NH355345335325490~63022222120t2t3tQ355GNH355345——490~6302222——t2t3tQ415NH415405395—520~680222220—t2t3tQ460NH460450440570~7302020t2t3tQ500NH500490480600~760t2t3tQ550NH550540530620~780t2t3tQ265GNH265———≥41027———t——Q310GNH310———≥45026———a——注：本表中t为钢材厚度；拉伸试验时，当屈服现象不明显时，可以采用R。3.3.4耐候钢材的冲击性能应符合表3.3.4的规定。质量等级V型缺口冲击试验试样方向温度/℃冲击吸收能量KV/JA纵向B+20C0D—20E—40≥27冲击试样尺寸为10mm×10mm×55mm。经供需双方协商，平均冲击功值可以≥60焦。注：1经供需双方协商，高耐候钢可以不作冲击试验。2冲击试验结果按三个试样的平均值计算，允许其中一个试样的冲击吸收能量小于规定值，但不得低于规定值的70%。3厚度不小于6mm或直径不小于12mm的钢材应做冲击试验。对于厚度不小于6mm但小于12mm或直径不小于12mm但小于16mm的钢材做冲击试验时，应采用10mm×5mm×55mm或10mm×7.5mm×55mm小尺寸试样，其试验结果应不小于表3.3.4规定值的50%或75%。应尽可能取较大尺寸的冲击试样。4.1热轧H型钢4.1.1热轧H型钢的截面图见图4.1.1，部分常用的热轧H型钢截面尺寸、截面面积、理论重量及截面特性应符合表4.1.1的规定。xxH—截面高度B—截面宽度t—腹板厚度t—翼缘厚度r—圆角半径yyrxtrxtyB类别型号（高×宽）(mm×mm)截面尺寸(mm)截面面积(cm)理论重量(kg/m)惯性矩(cm)惯性半径(cm)截面模数(cm)HBttrIIWWHW6.59830.0023.68392935.2846.97839.6431.116205636.393.7621675.17.551.4240.429009847.504.37331200×200200200863.5349.9472016008.615.02472250×250250250991.4371.81070036506.31860292300×300300300118.593.02020067507.551350450350×350350350171.939800136008.882280776400×4004004002122218.7666002240033301120HM200×15069829.926305078.303.6427167.6250×175244755.4943.660409844.21495300×200294200871.0555.81110016004.74756350×250340250999.5378.12120036506.051250292400×300390300133.33790072007.351940480类别型号（高×宽）(mm×mm)截面尺寸(mm)截面面积(cm)理论重量(kg/m)惯性矩(cm)惯性半径(cm)截面模数(cm)HBttrIIWWHM450×300440300153.95470081107.252490540500×300488300159.268900811020.82820540550×300550300166.089800811023.36.983270540600×30058830020187.2114000901024.76.933890601HN200×1002005.58826.6620.918108.222.2326.7250×12525069836.9629.039602942.8131747.03006.5946.7836.772105083.2948167.7350762.9149.4135009843.95771400×150400870.3755.2186007343.2292997.8400×200400200883.3765.42350017404.56450×150450877.4960.8257008063.22450×200450200995.4374.93290018704.421460500×150504103.381.141900108020.13.231660500×200500200112.388.146800214020.44.361870214550×200550200117.392.058200214022.34.272120214600×200600200131.775600227024.02520227625×20063020020170.0101000269024.43.973220268700×30070030024231.51970001080029.26.835640721800×30080030026263.52072860001170033.06.667160781900×30090030028305.82404040001260036.46.4289908424.1.2订货内容、分类代号、允许偏差、技术要求、试验方法、检验规则、以及包装、标志及质量证明书等，均应按现行国家标准《热轧H型钢和剖分T型钢》GB/T11263执行。厚度允许偏差应按本标准第3.1.11条执行。4.2热轧无缝钢管4.2.1热轧无缝钢管的截面图见图4.2.1，部分常用热轧无缝钢管的截面尺寸、允许偏差、截面面积、理论重量及截面特性应符合表4.2.1的规定。Dt—外直径—壁厚xytyDx外径(mm)外径允许偏差(mm)壁厚(mm)理论重量(kg/m)截面面积(cm)惯性矩(cm)惯性半径(cm)弹性模数(cm)塑性模数(cm)扭转惯量(cm)扭转模数(cm)单位长度表面积(m)DIiZSJC5.016.6521.21483.764.776967.52138.220.4406.019.8325.26568.034.742107.81162.308.026.04725.214.676103.60139.561450.42207.20219.1±2.20631.5340.1722827.5420827345644170.688841.653.129607.47270357591954051.665.735987.40328438719765761.378.142007.33383515840076670.890.247657.274355909531870273±2.75852.366.658529.37729562117008570.85864.982.671549.3152469214310104877.298.483969.2461581816792123089.4113.99580702940191601404325±3.25862.579.71001411.2161680420028123277.7991228775699324573151292.61447211.078911176289431781外径(mm)外径允许偏差(mm)壁厚(mm)理论重量(kg/m)截面面积(cm)惯性矩(cm)惯性半径(cm)弹性模数(cm)塑性模数(cm)扭转惯量(cm)扭转模数(cm)单位长度表面积(m)DIiZSJC325±3.25107.41657111.0010201355331422040121.91858710.951529371752288355.6±3.5585.2162209121195324501825101.71914010761417382792153117.92195212351634439042470134.02466313871847493262774406.497.82448012051572489502409116.72893714241867578742848135.53326016362157665203272154.0374491843244074898368620190.62434543222362989908644472457±4.63509015361998701803071131.74155618192377831133637152.94784520942748956894188174.02225395923613113107918472220215.5275656812874382213136257485084852019102480970403621146.857536226529531150724530170.621766331261134171326625222194.12477490929493874149818589820240.7307914283600476618285671996108484721.2278136001696945564234.429913178221.04321564726356386412029137116149020.9529569653229791059024346.844218997320.7622982463799461245830429.154723047620.5755710101460952151134.2.2订货内容、允许偏差、技术要求、制造方法、交货状态、力学性能、工艺性能、试验方法、检验规则、以及包装、标志及质量证明书等，均应按现行国家标准《结构用无缝钢管》GB/T8162、《无缝钢管尺寸、外形、重量及允许偏差》GB/T17395执行。厚度允许偏差应按本标准第3.1.11条执行。5.1冷弯矩形、方形空心型钢5.1.1冷弯矩形空心型钢的截面见图5.1.1，部分常用的冷弯矩形空心型钢截面尺寸、允许偏差、截面面积、理论重量及截面特性H—长边尺寸B—短边尺寸t—壁厚（各边均同）R—外圆弧半径yRxxxtyB边长(mm)边长允许偏差(mm)壁厚(mm)理论重量(kg/m)截面面积(cm)惯性矩(cm)惯性半径(cm)截面模数(cm)扭转惯量(cm)扭转模数(cm)HBtIIWWIC2004.024.513536187.435.0213455.023.830.416497507.374.9716522106.028.336.019298747.324.9319472458.036.546.4238610794.8223925073082004.021.226.9158410217.6719422195.026.233.4193512457.6223912676.031.139.6226814577.566.0622728263128.040.251.2289218157.435.9528324236643962204.021.827.718929488.265.8419872245.027.034.4231311558.215.8021024472746.032.140.8271413525.7524728913218.041.552.8338916858.015.653082413746407边长(mm)边长允许偏差(mm)壁厚(mm)理论重量(kg/m)截面面积(cm)惯性矩(cm)惯性半径(cm)截面模数(cm)扭转惯量(cm)扭转模数(cm)HBtIIWWIC2504.024.330.9269712349.346.3221626652755.030.138.4330415089.286.2726420132853376.035.845.6388617689.236.2331123638863968.046.559.2488622199.0839129650505042605.033.242.4412123509.867.4531726146954266.039.650.4485627639.817.4037430755665018.051.565.6614534939.687.29473388726764263.280.6736341749.567.205666468850772300200±2.005.038.048.4624133618.3441633668365526.045.257.6737039628.2949139681156518.059.175.2938950426265041062783872.792.61131360588.09754606129871012350250±2.205.045.858.4105206306601504122348176.054.769.6124577458712594145549678.071.691.216001957391476619136125388.419407115881109927235001522400200±2.405.045.858.41249043118.60624431105197426.054.769.61478950928.55739509120698778.071.691.21897465178.4594965215820113388.42300378648.3611507861936813732624889778.241312898227821591400250±2.605.049.763.4144407056722565147739376.059.475.6171188352856668175808.077.999.22204810744110286023127144096.226806130291340104228423175330766149261538335972042450250±2.806.064.181.622724924510107402068712538.084.22933611916130495327222162835737144701588334731983411371666318281333395912314500300±3.206.073.593.63301215151132110103242016888.096.7428051962417121308427672202523282393320931596527362693606042772624241848625813156550350±3.608.0597833004020.721741717635012856732763675220.626652100779013503204852494276920.431002444926464118236972694873120.3353727841067604710600400±4.008.0806704356422.826892178886723591990815342922.73303267210972044132281156706239122.53856312013068052012072641323107128222.44410356415085059622352991482107976022.34940398817051066945.1.2冷弯方形空心型钢的截面见图5.1.2，部分常用冷弯方形空心型钢的截面尺寸、允许偏差、截面面积、理论重量及截面特性应符合表5.1.2的规定。xB—边长t—壁厚（各边均同）R—外圆弧半径xtyxtRy B边长(mm)边长允许偏差(mm)壁厚(mm)理论重量(kg/m)截面面积(cm)惯性矩(cm)惯性半径(cm)截面模数(cm)扭转惯量(cm)扭转模数(cm)BtI=IWIC250±2.005.038.048.448059.9738474435776.045.257.656729.9245488436818.059.175.272299.805781159887872.792.687079.7069714197106284.898599.55789166911226280±2.205.042.754.46810486105137306.050.964.88054575125048638.066.684.8103177371643682.1104.61247989120173135696.1122.5142321017238041574300±2.406.054.769.69964664154349978.071.691.21280185320312129388.4155191035249661572177671184295141829350±2.806.064.181.6160089152468313728.084.2206181182325571787251891439401272182290541660475982552边长(mm)边长允许偏差(mm)壁厚(mm)理论重量(kg/m)截面面积(cm)惯性矩(cm)惯性半径(cm)截面模数(cm)扭转惯量(cm)扭转模数(cm)BtI=IWIC400±3.208.096.7312691564489342362382161911604312892443192216718433395208504142521827353877450±3.608.044966199970043301655100244986629370220464164285110351043572367321032541190004989500±4.008.06217220.024879648337507634130541194704612228891873568142420544020726410201040801645306241235299114260457018614070135.1.3冷弯矩形、方形空心型钢的弯角外圆弧半径R(或C1、C2)值应符合表5.1.3的规定。R(或C1、C2)值的测量方法按图5.1.3进行。厚度t（mm）碳素钢（R≤320MPa）低合金钢（R＞320MPa）t≤3(1.0～2.5)t(1.5～2.5)t3＜t≤6(1.5～2.5)t(2.0～3.0)t6＜t≤10(2.0～3.0)t(2.0～3.5)tt＞10(2.0～3.5)t(2.5～4.0)t注：R值指标准中规定的最低值，即下屈服强度。RtC5.1.4订货内容、允许偏差、长度、外形、技术要求等，均应按现行国家标准《结构用冷弯空心型钢》GB/T6728执行。厚度允许偏差应按本标准第3.1.11条执行。5.2冷弯圆形空心型钢5.2.1冷弯圆形空心型钢的截面见图5.2.1，部分常用冷弯圆形空心型钢的截面尺寸、允许偏差、截面面积、理论重量及截面特性应符合表5.2.1的规定。xD—外径t—壁厚ytyDx外径(mm)外径允许偏差(mm)壁厚(mm)理论重量(kg/m)截面面积(cm)惯性矩(cm)惯性半径(cm)弹性模数(cm)塑性模数(cm)扭转惯量(cm)扭转模数(cm)单位长度表面积(m/m)DtIiZSJC4.013.4217.09395.474.81056.5074.01790.94112.990.4405.016.6521.21483.764.776967.52138.220.4406.019.8325.26568.034.742107.81162.300.440415.8820.23655.945.6979.51103.711311.89159.020.518519.7325.13805.045.6697.58128.041610.070.518623.5329.97948.475.63114.97151.761896.93229.930.518830.9739.461218.925.56147.75197.362437.84295.500.518外径(mm)外径允许偏差(mm)壁厚(mm)理论重量(kg/m)截面面积(cm)惯性矩(cm)惯性半径(cm)弹性模数(cm)塑性模数(cm)扭转惯量(cm)扭转模数(cm)单位长度表面积(m/m)DtIiZSJC219.1±2.20526.433.619287.5722938563520.688631.5340.1722827.5420827345644170.688841.653.129607.4727035759195400.68851.665.735987.4032843871976570.688273±2.75533.042.137819.4827735975625540.858639.550.344879.4432942889746570.858852.366.658529.37429562117008570.85864.982.671549.315246921431010480.858325±3.25539.550.3643611.3239651212871792647.260.1765111.2847161115303942862.579.71001411.2161680420028123277.7991228711.1475699324573151292.61447211.078911176289431781355.6±3.55651.765.91007156673320141868.687.41320074296726400148585.2162209121195324501825101.71914010761417382792153406.4878.619870978127039750195697.82448012051572489502409116.72893714241867578742848457±4.60888.628450124516135689024903509015361998701803071131.74155618192377831133637508898.639280154620007856030934852019102480970403621146.857536226529531150724530外径(mm)外径允许偏差(mm)壁厚(mm)理论重量(kg/m)截面面积(cm)惯性矩(cm)惯性半径(cm)弹性模数(cm)塑性模数(cm)扭转惯量(cm)扭转模数(cm)单位长度表面积(m/m)DtIiZSJC6108118.86855221.32248289913710344958484721.2278136001696945564184.223510475521.1343544632095106869234.429913178221.04321564726356386415.2.2订货内容、允许偏差、长度、外形、技术要求等，均应按现行国家标准《结构用冷弯空心型钢》GB/T6728执行。厚度允许偏差应按本标准第3.1.11条执行。6.1分类代号6.1.1焊接空心型钢按外形形状分为矩形、异形空心型钢。6.1.2焊接空心型钢的代号：1焊接矩形空心型钢（含方形焊接空心型钢），代号：口；2焊接异形空心型钢，代号：T、L、日、田、十；其中：“T”表示T形，“L”表示L形，“日”表示日字形，“田”表示田字形，“十”表示十字形。6.2焊接矩形空心型钢6.2.1焊接矩形空心型钢的截面见图6.2.1，部分常用焊接矩形空心型钢的截面尺寸、允许偏差、截面面积、理论重量及截面特性应符合表6.2.1的规定。H—长边尺寸B—短边尺寸t—壁厚（各边均同）yxxxyB尺寸(mm)壁厚(mm)理论重量(kg/m)截面面积(cm)惯性矩(cm)惯性半径(cm)截面模数(cm)尺寸允许偏差(mm)HBIIWW200631.8440.56235915087.63236201841.9553.44304419367.556.0230425851.8166.00368223297.475.94368311633.7242.96258520097.766.84258236844.4656.64333925887.686.7633430454.9570.00404331267.606.68404368200636.5546.56292329237.927.92292292848.2361.44378137817.857.8537837859.6676.00458545857.777.77459459250636.5546.56402818199.306.25322243848.2361.44522423399.2241831259.6676.00635028206.0950837670.8490.24741132649.066.01593435638.4348.96438524139.467.02351284850.7464.64569231149.386.9445536662.8080.00692737679.316.8655444374.6195.04809143749.236.78647515200641.2652.56492134889.68394349854.5169.44639545199.608.0751245267.5186.00779154899.527.9962354980.26102.24911263999.447.91729640250645.9758.56581458149.969.96465465860.7977.44756775679.899.8960560575.3696.00923292329.819.8173973989.68114.249.739.73865865103.7512311123119.659.65985985117.56149.7613731137319.589.58300854.569.4274310.856.2954536667.586.09969331110.776.2166544180.3102.211674383710.6977851292.8118.213291432210.616.05886576105.0133.8476810.535.97988636857.072.68854363911.047.0859042870.790.0440810.967.0072151984.0107.01267010.886.9284560397.2123.814437579210.806.84962681110.0140.2641310.726.76754200860.877.49877525711.298.2465852675.496.012072639211.2180563989.7114.2746111.138.08944746103.7132.2846611.068.00847117.6149.818052941010.987.93941尺寸(mm)壁厚(mm)理论重量(kg/m)截面面积(cm)惯性矩(cm)惯性半径(cm)截面模数(cm)尺寸允许偏差(mm)HBIIWW300250867.185.411583873911.6477269983.2106.0141751067311.5610.0394585499.1126.2166541251311.499.961001114.7146.2190211426311.419.8812681141130.1165.8212811592511.339.8014191274300873.493.4132881328811.9311.9388688691.1116.0162791627911.8511.8510851085108.5138.2191431914311.7711.7712761276125.7160.2218862188611.6911.6914591459142.7181.8245112451111.6111.611634163435075.496.014662380212.366.2983850789.7114.217215440912.286.21984588103.7132.21965149711123663117.6149.82197254906.05125673278.5100.015818504812.5890459493.4119.018587587512.507.031062691108.1137.821233664612.416.951213782122.6156.223759736512.336.87135886620083.2106.017553729512.878.30100373099.1126.220644852312.798.221180852114.7146.223605967912.711349968130.1165.8264381076812.638.061511107725091.1116.0204441211413.2810.221168969108.5138.2240731421413.2013761137125.7160.2275581621410.0615751297142.7181.8309041811813.049.981766144930098.9126.0233351838213.6112.0813331225117.9150.2275022163313.5312.0015721442136.7174.2315122475213.4511.9218011650155.2197.8353692774113.3711.8420211849350106.8136.0262252622513.8913.8914991499127.4162.2309313093113.8113.8117671767147.7188.2354663546613.7313.7320272027167.8213.8398353983513.6513.6522762276187.6239.0440424404213.5713.572517251720207.2264.0480924809213.5013.502748274840083.2106.020555429313.936.36102857299.1126.224185498213.846.281209664114.7146.227663562113.766.201383749130.1165.830995621113.671550828尺寸(mm)壁厚(mm)理论重量(kg/m)截面面积(cm)惯性矩(cm)惯性半径(cm)截面模数(cm)尺寸允许偏差(mm)HBIIWW40086.4110.02207756891104669102.9131.025992662514.081300779119.1151.829750750014.007.031488882135.1172.233355831713.926.95166897820091.1116.024359819914.498.411218820108.5138.228703958414.418.331435958125.7160.2328801089214.338.2516441089142.7181.8368961212614.2518451213300106.8136.0319652048515.3312.2715981366127.4162.2377382412315.2518871608147.7188.2433152761721661841167.8213.8487003097015.0912.0424352065400122.5156.0395723957215.9315.9319791979146.2186.2467744677415.8515.8523392339169.7216.2537495374915.7715.7726872687192.9245.8605036050315.6915.6930253025215.9275.0670406704015.6115.613352335220238.6304.0733657336515.5315.5336683668450108.5138.232732555515.396.341455741125.7160.237502627115.306.261667836142.7181.842089693315.221871924159.4203.04649675452066100620175.8224.050729810915.056.0222551081112.3143.035035737615.651557868130.1165.840165835515.571785983147.7188.245104926915.487.0220051091165.0210.2498571012315.406.942216119120182.1232.0544291091715.326.8624191284200117.9150.2384891064616.018.4217111065136.7174.2441581210615.928.3419631211155.2197.8496271348315.848.2622061348173.5221.0548991478215.762440147820191.5244.0599801600515.6826661601300136.8174.2500022661316.9412.3622221774158.7202.2574693048216.8612.2825542032180.4229.8647023420016.7812.2028762280201.8257.0717053777116.703187251820222.9284.0784844119916.6212.0434882747450165.0210.2672736727317.8917.8929902990191.7244.2774367743617.8117.8134423442218.0277.8873158731517.7317.7338813881244.2311.0969149691417.6517.654307430720270.0344.010623910623917.5717.5747224722尺寸(mm)壁厚(mm)理论重量(kg/m)截面面积(cm)惯性矩(cm)惯性半径(cm)截面模数(cm)尺寸允许偏差(mm)HBIIWW500200127.4162.2501531170817.588.502006147.7188.2576131331917.508.4123051332167.8213.8648291484117.418.3325931484187.6239.0718071627817.338.252872162820207.2264.0785521763217.2531421763250136.8174.2572991931610.5322921545158.7202.2658822206918.0510.4526351766180.4229.8742022469917.9710.3729681976201.8257.0822662721017.8910.293291217720222.9284.0900792960417.8110.2136032368300146.2186.2644452910318.6012.5025781940169.7216.2741513334718.5212.4229662223192.9245.8835763743018.4412.3433432495215.9275.0927264135418.3612.263709275720238.6304.01016054512518.2840643008400165.0210.2787365580919.3516.2931492790191.7244.2906896418319.2716.2136283209218.0277.81023237230640933615244.2311.01136458018316.064546400920270.0344.01246598781919.0315.9849864391500183.9234.2930289302819.9319.9337213721213.6272.210722710722719.8519.8542894289243.2309.812107112107119.7719.7748434843272.4347.013456413456419.6919.695383538320301.4384.014771214771219.6119.615908590824358.7457.017299917299919.4619.4669206920600400243.2309.81580328410922.5916.4852684205272.4347.01758019332622.5116.405861466620301.4384.019315210227222.4316.326438511424358.7457.022662311937522.2775545969500268.3341.818532313981823.2920.2361775593300.7383.020629615548223.2120.156877621920332.8424.022680517076523.1320.077560683124396.4505.026645920021122.9719.9188828008600293.4373.821261521261523.8523.8570877087328.9419.023679123679123.7723.777893789320364.2464.026045926045923.6923.698682868224434.1553.030629630629623.5423.5410210102106.2.2焊接矩形空心型钢的订货内容、允许偏差、长度、外形、技术要求等，可参照《结构用冷弯空心型钢》GB/T6728的规定。厚度允许偏差应按本标准第3.1.11条执行。6.3焊接异形空心型钢6.3.1焊接异形空心型钢分为L形、T形、日字形、田字形、十字形，截面图见图6.3.1-1~6.3.1-5。部分常用的焊接异型空心型钢的截面尺寸、允许偏差、截面面积、理论重量及截面特性等应符合表6.3.1-1~6.3.1-5的规定。H—单肢长度B—肢宽t—壁厚y—质心距离H—腹板高L—翼缘长B—肢宽t—壁厚y—质心距离HvuytyvuytyxxtxxttvuyvuByL/2L/2txxtB4/2B4B4/2yH—长边尺寸B—短边尺寸t—外壁厚t—内壁厚B—边长t—外壁厚t—内隔板壁厚xxxyByxxxyBH—单向总长B—肢宽B—B=(H-B)/2t—壁厚y'1'1yHy…6t6nt6y…6t6nt6尺寸(mm)壁厚(mm)质心距离y(mm)理论重量(kg/m)截面面积(cm)截面特性（I为惯性矩；i为惯性半径；W为截面模数）尺寸允许偏差(mm)x-x轴u-u轴v-v轴BHI(cm)(cm)W(cm)I(cm)(cm)W(cm)I(cm)(cm)W(cm)300668.487.183669.804841073011.1050660028.30333890.2114.9108889.746291399011.0466077878.23433142.0132859.677681710010.978079470529132.3168.5155619.618992006510.91946110576184008247115.314