... /medium-pressure boiler tube 10#,20#,A,B60005Transmission fluid tube 10#,20#,Q295,Q345,Q390300006Structural use of seamless steel tubes10#~45#,40Mn2, ... 35Cr,35CrMo500007Hydraulic pillar tube, cylinder sleeve etc.45#,27SiMn20008pipes for ... fertilizer equipment10,20,16Mn,15Mnv,12CrMo,15CrMo9000 carbon seamless steel pipe