... ASTMA53GRB DIN ANSI GB SH HG APIMaterialGRB20#STEEL,A3,A234,ASTM,Q235,Q345,10#,45#,12CrMo, ,ST37 ,16Mn,Cr5Mo,15CrMoOD1 ... ToleranceD<48.3mm,+-0.4mm/-0.79mm,D48.3-114.3mm,+-0.79%,D>114.3mm +-1.59/-0.79mmWT ToleranceWT+-12. ... 0.30%,SI:>0.10%,MN:0.29-1.06%,P:<0.035%,S:<0.035%,Cu:<0.40%,Ni<0.40%,Cr:<0.40%,Mo:0.15%,V:0 ... long, high security, highly pressurized, widely usedMin order3 tons ASTM carbon steel pipe