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Hydraulic Alloy Seamless Steel Tube, ASTM A519 Specifications 1, Hydraulic Alloy Seamless Steel tube 2,13CrMo44, 12Cr1MoVG, 15CrMoG, 15Mo3 3,epoxy, FBE, black paint 4,ASTM A519 Description: 1.1.1 ...