q235化学成分 含硅量的下线

问题描述:

q235化学成分 含硅量的下线

牌号 等级 化学成分(质量分数)(%)
C Mn Si S P


Q235 A 0.14~0.22 0.30~0.65
0.30 0.050 0.045
B 0.12~0.20 0.30~0.70 0.045
C ≤0.18 0.35~0.80 0.040 0.040
D ≤0.17 0.035 0.035

Q235分A、B、C、D四级(GB700-88)
Q235A级含C0.14~0.22% Mn0.30~0.65Si≤0.30S≤0.050P≤0.045
Q235B级含C0.12~0.20% Mn0.30~0.670Si≤0.30S≤0.045P≤0.045
Q235C级含C≤0.18% Mn0.35~0.80Si≤0.30S≤0.040P≤0.040
Q235D级含C≤0.17% Mn0.35~0.80Si≤0.35S≤0.040P≤0.035