耐候结构钢化学成分

牌号化学成分（%）CSiMnPSCuCrNi其他元素Q265GNH≤0.120.10-0.400.20-0.500.07-0.12≤0.0200.20-0.450.30-0.650.25-0.50⑤①，②Q295GNH≤0.120.10-0.400.20-0.500.07-0.12≤0.0200.20-0.450.30-0.650.25-0.50⑤①，②Q310GNH≤0.120.25-0.750.20-0.500.07-0.12≤0.0200.20-0.500.30-1.25≤0.65①，②Q355GNH≤0.120.20-0.75≤1.000.07-0.15≤0.0200.25-0.550.30-1.25≤0.65①，②Q235NH≤0.13⑥0.10-0.400.20-0.60≤0.030≤0.0300.25-0.550.40-0.80≤0.65①，②Q295NH≤0.150.10-0.500.30-1.00≤0.030≤0.0300.25-0.550.40-0.80≤0.65①，②Q355NH≤0.16≤0.500.50-1.50≤0.030≤0.0300.25-0.550.40-0.80≤0.65①，②Q415NH≤0.12≤0.65≤1.10≤0.025④≤0.0300.20-0.550.30-1.250.12-0.65⑤①，②，③Q460NH≤0.12≤0.65≤1.50≤0.025④≤0.0300.20-0.550.30-1.250.12-0.65⑤①，②，③Q500NH≤0.12≤0.65≤2.0≤0.025④≤0.0300.20-0.550.30-1.250.12-0.65⑤①，②，③Q550NH≤0.16≤0.65≤2.0≤0.025④≤0.0300.20-0.550.30-1.250.12-0.65⑤①，②，③耐候结构钢力学性能①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：Nb 0.015%-0.060%，V 0.02%-0.12%,Ti 0.02%-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。②可以添加下列合金元素：Mo≤0.30%，Zr≤0.15%③Nb、V、Ti等三种合金元素的添加总量不应超过0.22%④供需双方协商，S的含量可以不大于0.008%⑤供需双方协商，Ni的含量下限可不做要求。⑥供需双方协商，C的含量可以不大于0.15%注：成品钢材化学成分的允许偏差应符合GB\T 222的规定。耐候结构钢力学性能