常用低合金高强度结构钢的牌号及化学成分(摘自GBT

附表4.1 常用低合金高强度结构钢的牌号及化学成分(摘自GB/T 1591-1994)牌号质量等级化学成分w/%C≤MnSi≤P≤S≤VNbTiAl≥Cr≤Ni≤Q295AB0.160.160.80

附表4.1常用低合金高强度结构钢的牌号及化学成分(摘自GB/T1591-1994) 质 w 化学成分/% 量 牌号 等 C≤ Mn Si≤ P≤ S≤ V Nb Ti Al≥ Cr≤ Ni≤ 级 A 0.16 0.801.50 0.55 0.045 0.045 0.020.15 0.0150.060 0.020.20 - Q295 B 0.16 0.801.50 0.55 0.040 0.045 0.020.15 0.0150.060 0.020.20 - A 0.20 1.001.60 0.55 0.045 0.045 0.020.15 0.0150.060 0.020.20 - B 0.20 1.001.60 0.55 0.040 0.040 0.020.15 0.0150.060 0.020.20 - Q345 C 0.20 1.001.60 0.55 0.035 0.035 0.020.15 0.0150.060 0.020.20 0.015 D 0.20 1.001.60 0.55 0.030 0.030 0.020.15 0.0150.060 0.020.20 0.015 E 0.20 1.001.60 0.55 0.025 0.025 0.020.15 0.0150.060 0.020.20 0.015 0.020.20 A 0.20 1.001.60 0.55 0.045 0.045 0.0150.060 0.020.20 - 0.30 0.70 0.020.20 B 0.20 1.001.60 0.55 0.040 0.040 0.0150.060 0.020.20 - 0.30 0.70 0.020.20 Q390 C 0.20 1.001.60 0.55 0.035 0.035 0.0150.060 0.020.20 0.015 0.30 0.70 0.020.20 D 0.20 1.001.60 0.55 0.030 0.030 0.0150.060 0.020.20 0.015 0.30 0.70 0.02-0.2 E 0.20 1.001.60 0.55 0.025 0.025 0.0150.060 0.020.20 0.015 0.30 0.70 0 A 0.20 1.001.70 0.55 0.045 0.045 0.020.20 0.0150.060 0.020.20 - 0.40 0.70 B 0.20 1.001.70 0.55 0.040 0.040 0.020.20 0.0150.060 0.020.20 - 0.40 0.70 Q420 C 0.20 1.001.70 0.55 0.035 0.035 0.020.20 0.0150.060 0.020.20 0.015 0.40 0.70 D 0.20 1.001.70 0.55 0.030 0.030 0.020.20 0.0150.060 0.020.20 0.015 0.40 0.70 E 0.20 1.001.70 0.55 0.025 0.025 0.020.20 0.0150.060 0.020.20 0.015 0.40 0.70 C 0.20 1.001.70 0.55 0.035 0.035 0.020.20 0.0150.060 0.020.20 0.015 0.70 0.70 Q460 D 0.20 1.001.70 0.55 0.030 0.030 0.020.20 0.0150.060 0.020.20 0.015 0.70 0.70 E 0.20 1.001.70 0.55 0.025 0.025 0.020.20 0.0150.060 0.020.20 0.015 0.70 0.70 274