... B60005Transmission fluid tube10#,20#,Q295,Q345,Q390300006Structural use of seamless steel tubes10#~45#,40Mn2,35Cr,35CrMo500007Hydraulic pillar tube, cylinder ... T95,P110,Q125,9Cr,13Cr2100003Line pipeB,X42~X80200004Transmission fluid tube10,20,Q295,Q345350005high-pressure boiler tube20G, ... steel tubes10,20,45,35CrMo,40Cr3500010Shipping use of tube320,360,410,4609000 Total 450000 API carbon steel tube