... products, please make contact with us Detailed Product Descriptionseamless steel pipe (1) mill test certificate (2)iso9001 certificate (3)API ... ,40Cr,35CrMo,42CrMo,12CrMoV,10CrMo910, 12Cr1MoV, 15CrMo etc.seamless steel pipe Main materialStandard accordingspecification Alloy pipeCr5Mo.(P5.STFA25.T5)GB5310-9525 ... -377*9-40 Marine pipe410GB/T5312-199925-426*4-45 Fluid pipe20Q345GB/T8163-199925-560*4-40