API5L美国石油钢管标准尺寸公差标准外径公差壁厚公差A25.A.BX42-X70D<60.3+0.41/-0.40mmD<73+20/-12.5%D273+15/-12.5%API SPEC5LDM60.3+0.75/-0.40mmD273+15/-12.5%D>73+15/-12.5%机械性能标准纲级屈服强度(MPa)抗拉强度(MPa)延伸率API SPEC 5LPSL1A25172310A207331B241414X42290414X46317434X52359455X56386490X60414517X65448531X70483565PSL2MinMaxMinMaxB241448414758X42290496414758X46317524434758X52359531455758X56386544490758X60414565517758 化学成份标准cMnPSMaxMaXMinMaXMaxAPISPEC5LPSL1A25II0.210.600.0300.030A25III0.210.600.450.800.030A0.220.900.0300.030B0.281.200.0300.030X420.281.300.0300.030X46■0.281.400.0300.030X65X7QX80448483552600531758621565758690621827 LD CM • X LO 9X 90 X CO LO ・X 卜 O0.281.400.0300.030PSL2B0.241.200.0250.015X420.241.300.0250.015X46■X52■X0.241.400.0250.015 0.241.400.0250.015www.jbfgt.coinwww.3O。