|
发表于 2013-5-6 13:03:32
|
显示全部楼层
和Q345完全不一样:
EN355, 合金渗碳钢,成分:C 0.15-0.2%, Mn 0.4-0.7%, Cr 1.4-1.7%, Ni 1.8-2.2%, Mo 0.15-0.25%, Si 0.15-0.35%;
与国产的20Cr2Ni4有点像。
20Cr2Ni4, C 0.17-0.24%, Mn 0.30-0.60%, Si 0.20-0.40%, Cr 1.25-1.75%,Ni含量稍微多些3.25-3.75%。
Q345是低合金钢,基本上不含Cr、Ni和Mo。
Q345A:C≤0.20,Mn ≤1.70,Si≤0.50,P≤0.035,S≤0.035;
Q345B:C≤0.20,Mn ≤1.70,Si≤0.50,P≤0.035,S≤0.035;
Q345C:C≤0.20,Mn ≤1.70,Si≤0.50,P≤0.030,S≤0.030,Al≥0.015;
Q345D:C≤0.18,Mn ≤1.70,Si≤0.50,P≤0.030,S≤0.025,Al≥0.015;
Q345E:C≤0.18,Mn ≤1.70,Si≤0.50,P≤0.025,S≤0.020,Al≥0.015;
Q345A、B、C、D、E均含Nb≤0.07,V≤0.15,Ti≤0.20,Cr≤0.30,Ni≤0.012,Mo≤0.10。
|
|