钢种标准CSiMnPSQ195GBT700-2006≤0.12≤0.30≤0.50≤0.035≤0.040内控0.080.100.130.180.400.50≤0.035≤0.040Q215AGBT700-2006≤0.15≤0.35≤1.20≤0.045≤0.050内控0.100.130.130.180.400.55≤0.045≤0.050Q215BGBT700-2006≤0.15≤0.3

各钢种化学成分及力学性能对照表引用标准牌号等级化学成分力学性能　CMn SiSPNbV TiCrNiCu屈服强度RelMpa抗拉强度RmMpa伸长率A 冲击功J碳素结构钢GB700-88Q195—0.060.120.250.50≤0.30≤0.050≤0.045——————195315430≥33—Q215A0.090.150.250.55≤0.30≤0.050≤0.045≥21533545