... .D:16mm-630mm 2.thickness:2mm-25mm 20# 45# carbon seamless steel pipe Description20# 45# carbon seamless steel pipeTechniquehot rolled, cold rolled ... -1999,GB/T8163-1999,GB3087-1999,GB5310-1995,GB6479-2000Material20#, 45#, A106B, A53BThickness2mm-25mmO.D16mm-630mmPayment30% TT in advance, balance against ... .370.50-0.800.0350.0350.250.250.25//450.42-0.500.17-0.370.50-0.800.0350.0350 ...