牌号C≤Si≤Mn≤P≤S≤Alt≥Cr≤Ni≤B≤CEV典型值
BP3000.220.52.00.0200.0150.0150.50.50.0050.60
BP3700.320.51.50.0200.0150.0151.00.50.0050.52
BP4400.351.01.850.0200.0150.0151.00.50.0050.55
BP5000.500.51.700.0200.0150.0151.20.80.0050.62
BP6000.501.01.850.0200.0150.0151.20.80.0050.67