Q235A.

是中国表示钢号的牌号,用得非常广泛的!
ABC主要是里面的化学元素有稍许差别,从而性能上也有所区别
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
而F指的是沸腾钢.