... steel tubes10#~45#,40Mn2,35Cr,35CrMo500007Hydraulic pillar tube, cylinder sleeve etc.45#,27SiMn20008pipes for high-pressure fertilizer equipment20G,15MnV10009Shipping use of tube320,4101000Total ... ,20MnG,25MnG,12Cr1MoVG,15CrMoG,P9145006lower/medium-pressure boiler tube10,20200007Hydraulic pillar tube20,30,45,27SiMn225008pipes for high-pressure fertilizer equipment10,20,16Mn,15Mnv,12CrMo ...