SPHC热轧钢SPHC属于优质碳素结构钢化学成分：碳C：≤0.12硅Si：≤0.05锰Mn：≤0.50磷P：≤0.035硫S：≤0.035铝Al：≥0.010机械性能:抗拉强度不小于270Mpa伸长率根据厚度不小于27-31%相当于国标的08钢。Q235A化学成分(%)0.14-0.22C,0.30-0.65Mn(F钢Mn上限0.60),0.30Si,0.050S,0.045P,残余铬、镍、铜各0.30形态锭、坯、型、条、板、管、带线状态热（冷）轧、正火抗拉强度Mpa375-460屈服强度Mpa185-235伸长率%21-26（按不同尺寸）无冲击性能要求。)