Weifang Leon Machinery Co.,Ltd.

27SiMn Hydraulic Cylinder Rolling TubeHoning tube and rolling tube inside and outside wall oxide layer,Website:://.leonhydraulic.com, to withstand high pressure without leakage, high-precision, high-quality finish, cold deformation, flaring, flattening without cracks a bit, so mainly used to produce pneumatic or hydraulic components products, such as cylinder or cylinders, which can be seamless. Product ParametersCylinder ID: 40-400mmWall thickness: 3-50mmMaterial: 20#  45#(CK45)  16Mn(ST52)  25Mn  27SiMn  Standard: GB/T8713-88 GB/T3639-2000 DIN2391 EN10305Processing formCylinder ID (mm)Length  (m)Straightness (mm/m)Tolerance    on IDRoughness (μm)Cold drawn30-250≤ 13m0.2-0.5H9-H110.8-1.6Cold rolling30-100≤ 12m0.2-0.5H9-H100.8-1.6Honed40-800≤ 7m0.2-0.3H7-H90.4-0.8Mechanical PropertiesSteel GradeTensile strength(σb N/mm2)Yield strength(σs N/mm2)Elongation(δ %)HardnessHB   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 thicknessH7 H8 H9 H10 H11 30 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