热销碳钢管/使用1级天然气和石油管API 5L:API 5L GR.B,A106 GR.B,A53 GR.B,A179,2.大小:1/4“-24inch无缝,24“-48”weled 3.标准:API 5L,ASTM A53,A106 ASTM,ASTM A179,BS1387 4.认证:ISO9001,SGS,API,BV,PED,所述API-5L扁钢管MILL CERTIFICATE 5化学组成标准钢Grade Chemical composition, % Tensile strength, MPa Yield strength, MPa Elongation, % C Mn P S MAX MIN API-5L B 0.27 1.15 0.03 0.03 413 241 21.5-29.5 X42 0.29 1.25 0.03 0.03 413 289 21.5-29.5 X46 0.31 1.35 0.03 0.03 434 317 20.5-28.5 X52 0.31 1.35 0.03 0.03 455 358 19.5-27 X56 0.26 […]