<img><br>Q235分A、B、C、D四级(GB/T 700-2006):1、Q235A级含 C 0.14-0.22% Mn 0.30-0.65% Si ≤0.30% S ≤0.050 P ≤0.045.2、Q235B级含 C 0.12-0.20% Mn 0.30-0.70%<br>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<br>Q195,【化学成分】(质量分数)(%) C:≤0.12 Mn:≤0.50 Si:≤0.30 S:≤0.040 P:≤0.035 Q235