... ,ASTM,Q235,Q345,10#,45#,12CrMo, ,ST37 ,16Mn,Cr5Mo,15CrMoOD1/4''-24'',13mm-610mmWTSCH20,SCH40,SCH60,SCH80,SCH100,SCH120,SCH160,XXSUsagePetroleum ... -114.3mm,+-0.79%,D>114.3mm +-1.59/-0.79mmWT ToleranceWT+-12.5%ChemicalC:<0.30%,SI:>0.10%,MN:0 ... .29-1.06%,P:<0.035%,S:<0.035 ...