CK20 Skived Rolling Burnished Hydraulic Cylinder TubeProduct SpecificationCylinder ID: 40mm-400mm Thickness:≥4mmMaterial: 20#(A106B,Website:://.leonhydraulic.com,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 20#≥520≥470≥1217545#(CK45)≥600≥520≥1220716Mn(ST52)≥600≥520≥1519025Mn≥600≥510≥1519527SiMn≥800≥720≥10230Dimension ToleranceSize of ID (mm)
ID ToleranceTolerance of wall thicknessH7H8H9H10H1130 0.021
0 0.033
0 0.052
0 0.084
0 0.130
0±5%>30-50 0.025
0 0.039
0 0.062
0 0.100
0 0.160
0>50-80 0.030
0 0.046
0 0.074
0 0.120
0 0.190
0>80-120 0.035
0 0.054
0 0.087
0 0.140
0 0.220
0>120-180 0.040
0 0.063
0 0.100
0 0.160
0 0.250
0>180-250 0.046
0 0.072
0 0.115
0 0.185
0 0.290
0>250-315 0.052
0 0.081
0 0.130
0 0.210
0 0.320
0>315-400 0.057
0 0.089
0 0.140
0 0.230
0 0.360
0Product ProcessPacking
CK20 Rolled Tube