q235d钢板 Q235是碳素结构钢,根据国标(GB/T 221-2000)规定,235为其屈服强度,即235MPa 化学成分: Q235分A、B、C、D四级(GB700-2006) Q235***含C≤0.22 Mn≤1.40 Si≤0.35 S≤0.050 P≤0.045 Q235B级含C≤0.20 Mn≤1.40 Si≤0.35S≤0.045 P≤0.045 Q235C级含C≤0.17Mn≤1.40 Si≤0.35S≤0.040 P≤0.040 Q235D级含C≤0.17Mn≤1.40 Si≤0.35S≤0.035 P≤0.035