main purpose:seamless pipe for structure,seamless steel pipe for fluid,petroleum casing pipe and oil pipe,steel rolling etc. table1 production ... -35CrMo,42CrMo 2Billet of the fluid seamless pipe 20,Q3453Billet of the boiler pipe20G,12Cr1MoVG,15CrMoG4Billet of petroleum cracking pipe 20,12CrMo ...