carbon steel seamless pipe OD:60mm-273mm ... tube10#,20#,Q295,Q345,Q390300006Structural use of seamless steel tubes10#~45#,40Mn2,35Cr,35CrMo500007Hydraulic pillar tube, ... equipment20G,15MnV10009Shipping use of tube320,4101000Total 200000FQM continuous rolling unit(OD60—180mm,wall thickness 3. ... ,16Mn,15Mnv,12CrMo,15CrMo90009Structural use of seamless steel tubes10,20,45,35CrMo,40Cr3500010Shipping use of ...