high wear-resisting ,aging resistant , service life is long, high security, highly pressurized, widely used Typecarbon steel ... ,Q345,10#,45#,12CrMo, ,ST37 ,16Mn,Cr5Mo,15CrMoOD1/4''-24'',13mm-610mmWTSCH20,SCH40,SCH60,SCH80,SCH100,SCH120,SCH160,XXSUsagePetroleum ... s requestAdvantagehigh wear-resisting ,aging resistant , service life is long, high security, highly pressurized, widely usedMin order3 tons