管线球阀过渡段材料的选择与管线球阀过渡段材料的选择与焊接端应力的数值分析焊接端应力的数值分析牌牌 号号C CMnMnSiSiP PS SNiNiCrCrCuCuMoMoNbVNTiLF6LF60.221.151.500.150.300.0250.0250.40.30.40.120.020.040.110.010.03/L360L3600.21.60.450.0250.020.30.30.250.10.050.100.0120.04L415L4150.211.60.450.0250.020.30.30.250.10.050.150.0120.04L450L4500.161.60.450.0250.020.30.30.250.10.050.090.0120.06牌牌 号号b(MPab(MPa)s(MPas(MPa)()HBHBAKvAKv(J)(J)LF6 Class1455-630 3602240 19716LF6 Class2515-690 4152040 19720L360 460R0.5：360-51020/L415 520R0.5：415-56518/L450 535R0.5：450-57018/严重应变不协调严重应变不协调严重应力集中严重应力集中应力集中减轻应力集中减轻
