... 45#,12CrMo, ,ST37 ,16Mn,Cr5Mo,15CrMoOD1/4''-24'',13mm-610mmWTSCH20,SCH40,SCH60,SCH80,SCH100, ... SCH120,SCH160,XXSUsagePetroleum, Smelting, Boiler Use, Water transport, Building, Machinery, Traffic, Aviation, Oil ... .3mm,+-0.79%,D>114.3mm +-1.59/-0.79mmWT ToleranceWT+-12.5%ChemicalC ... or as customer's requestAdvantagehigh wear-resisting ,aging resistant , service life is long, high security, highly ...