优质碳素结构钢热轧厚钢板和宽钢带.doc

《优质碳素结构钢热轧厚钢板和宽钢带.doc》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。

1、优质碳素结构钢热轧厚钢板和宽钢带（GB/T711-1988）(1)尺寸规格钢板和钢带的适用厚度范围为>4～60mm。其尺寸规格和允许偏差应符合GB/T709《热轧钢板和钢带》的规定。(2)牌号和化学成分见表5-20。表5-20优质碳素结构钢热轧厚钢板和宽钢带的牌号和化学成分牌号化学成分(质量分数)(%)CsiMnPSCrNiCu≤05F≤0.06≤0.03≤0.40.0.0350.0400.100.250.2508F0.05～0.11≤0.030.25～0.500.0350.0400.100.250.25080.05～0.120.17～0.370.35～0.650.03

2、50.0400.100，250.2510F0.07～0.14≤0.070.25～0.500.0350.0400.150.250.25100.07～0.140.17～0.370.35～0.650.0350.0400.150.250.2515F0.12～0.19≤0.070.25～0.500.0350.0400.250.250.25150.12～0.190.17～0.370.35～0.650.0350.0400.250.250.2520F0.17～0.24≤0.070.25～0.500.0350.0400.250.250.25200.17～0.240.17～0.370.35

3、～0.650.0350.0400.250.250.25250.22～0.300.17～0.370.50～0.800.0350.0400.250.250.25300.27～0.350.17～0.370.50～0.800.0350.0400.250.250.25350.32～0.400.17～0.370.50～0.800.0350.0400.250.250.25400.37～0，450.17～0.370.50～0.800.0350.0400.250.250.25450.42～0.500.17～0.370.50～0.800.0350.0400.250.250.25500.47

4、～0.550.17～0.370.50～0.800.0350.0400.250.250.25550.52～0.600.17～0.370.50～0.800.0350.0400.250.250.25600.57～0.650.17～0.370.50～0.800.0350.0400.250.250.25650.62～0.700.17～0.370.50～0.800.0350.0400.250.250.25700.67～0.750.17～0.370.50～0.800.0350.0400.250.250.2520Mn0.17～0.240.17～0.370.70～1.000.0350.0

5、400.250.250.2525Mn0.22～0.300.17～0.370.70～1.000.0350.0400.250.250.2530Mn0.27～0.350.17～0.370.70～1.000.0350.0400.250.250.2540Mn0.37～0.450.17～0.370.70～1.000.0350.0400.250.250.2550Mn0.48～0.560.17～0.370.70～1.000.0350.0400.250.250.2560Mn0.57～0.650.17～0.370.70～1.000.0350.0400.250.250.2565Mn0.62～

6、0.700.17～0.370.90～1.200.0350.0400.250.250.25注：1.08钢允许用铝代替硅脱氧。此时，钢中含锰量下限为0.25%，含硅量不大于0.03%，钢中酸溶铝AL含量为0.015%～0.065%或全铝ALt.含量为0.02%～0.07%，牌号为08Al。　　2.上述含量皆指质量分数。(3)交货状态钢板和钢带以热处理(正火、退火或高温回火)状态交货。(4)力学性能见表5-21。表5-21优质碳素结构钢热轧厚钢板和宽钢带的力学性能牌号抗拉强度ób/MPa伸长率δ5(%)牌号抗拉强度ób/MPa伸长率δ5(%)≥≥08F315345062516

7、0832533556451310F3253260675121033532656951015F35530707159153703020Mn4502420F3802725Mn49022204102830Mn54020254502440Mn59017304902250Mn65013355302060Mn695ll405701965Mn73594560017注：1.热处理或热轧状态交货的钢板和钢带，抗拉强度、伸长率应符合上表的规定。但退火或高温回火状态交货的钢板，当其伸长率较表中规定提高2%以上(绝对值)时，允许抗拉强度比表中规定降低40MPa。