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常用尺寸 Q8*1500-2550*9200-12500 Q9*1850-2600*9200-12450 Q10*2650-3000*8000-10000 Q12*1800-2550*9000-11000 Q14*1850-2500*7600-10000 Q15*2000-3000*6800-14000 Q16*2050-3000*8000-12100 Q17*2200-2900*7600-11350[2] 一般材質(zhì) 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,N≤0.012,Mo≤0.10。
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