... boiler tube20G50004lower/medium-pressure boiler tube10#,20#,A,B60005Transmission fluid tube10#,20#,Q295,Q345,Q390300006Structural use of seamless ... Q125,9Cr,13Cr2100003Line pipeB,X42~X80200004Transmission fluid tube10,20,Q295,Q345350005high-pressure boiler tube20G,20MnG,25MnG, ... 45,27SiMn225008pipes for high-pressure fertilizer equipment10,20,16Mn,15Mnv,12CrMo,15CrMo90009Structural use of seamless ...