... rolling etc. table1 production cross cection of the round billet output(10,000 tones/year)round billet length cross-section size ø150mm ... table2 steel pipe No. Steel type Steel grade 1Billet of stucture seamless pipe20,45,Q345,20Cr,40Cr,20CrMo,30-35CrMo ... seamless pipe 20,Q3453Billet of the boiler pipe20G,12Cr1MoVG,15CrMoG4Billet of petroleum cracking pipe 20,12CrMo,1Cr5Mo5Billet of the hydraulic prop ...