合肥Q345B方管化学成份100*100*8
,Q345B方管化学成份 牌号 C Si Mn P S V Nb Al Ti Cr Ni Cu Q345A ≤0.20 ≤0.50 ≤1.70 ≤0.035 ≤0.035 ≤0.15 ≤0.07 - ≤0.20 ≤0.30 ≤0.50 ≤0.30 Q345B ≤0.20 ≤0.50 ≤1.70 ≤0.035 0.035 ≤0.15 ≤0.07 - ≤0.20 ≤0.30 ≤0.50 ≤0.30 Q345C ≤0.20 ≤0.50 ≤1.70 ≤0.030 ≤0.030 ≤0.15 ≤0.07 ≥0.015 ≤0.20 ≤0.30 ≤0.50 ≤0.30 Q345D 0.18 ≤0.50 ≤1.70 ≤0.030 ≤0.025 ≤0.15 ≤0.07 ≥0.015 ≤0.20 ≤0.30 ≤0.50 ≤0.30 Q345E ≤0.18 ≤0.50 ≤1.70 ≤0.025 ≤0.020 ≤0.15 ≤0.07 ≥0.015 ≤0.20 ≤0.30 ≤0.50 ≤0.30