Q345分A、B、C、D四级(GB700-88) Q345A级含 C0.14~0.22% Mn0.30~0.65 Si0.30 S0.050 P0.045 Q345B级含 C0.12~0.20% Mn0.30~0.670 Si0.30 S0.045 P0.045 Q345C级含 C0.18% Mn0.35~0.80 Si0.30 S0.040 P0.040 Q345D级含 C0.17% Mn0.35~0.80 Si0.35 S0.040 P0...
http://www.jshkjs.com/jiaogang/q345/6735.html 分类:Q345角钢 点击:1 日期:2012-12-17