CK20 Rolled Tube

CK20 Skived Rolling Burnished Hydraulic Cylinder TubeProduct SpecificationCylinder ID: 40mm-400mm Thickness:≥4mmMaterial: 20#(A106B,C20),45#(CK45),16Mn(ST52,E355),25Mn,27SiMnStandard: GB/T8713-88 ISO4394/1-1980(EN0305,DIN2391)Rolling Tube for Hydraulic CylinderMaterial:ST52, CK45, 4140, 16Mn, 42CrMo, E355, Q345B, Q345D, Stainless Steel 304/316, Duplex 2205,etc.Delivery Condition:BK, BK+S, GBK, NBKID:20mm - 1500mmLength:max 13mType:Seamless, Cold DrawnStraightness:≤ 0.5/1000Roughness:0.2-0.4 uTolerance EXT:DIN2391, EN10305, GB/T 1619Tolerance INT:H7, H8, H9Protection:anti-rust oil on inside and outside surface, plastic caps in both ends.Packing:bundle with steel strip and knitting strip, or wooden case.Mechanical PropertiesSteel GradeTensile strength(σb N/mm2)Yield strength(σs N/mm2)Elongation(δ %)Hardness HB