DIN 2391 St52 Honed Steel Tube for Hydraulic Cylinder

Product Description
Outer diameter:25mm -500mm
Wall thickness: 2-50mm
Material:ST52, Q345B,CK20, CK45, SAE1026
Standard: GB/T8713-88, GB/T3639-2009, DIN2391, EN10305
Honed tubes can be produced according to the demands of costumers that the degree of precision can reach H8/H9. Burnishing and honing service can be provided depending on the roughness requirement of inner diameter.Material & Chemical Composition
DIN2391 standard ST52, EN10305 standard E355, 16Mn, ASTM A106B, C20/20#, CK45
MaterialCSiMnS(≤)P(≤)CrNiMoother
A106B / C20#
0.17-0.23
0.17-0.37
0.35-0.65
0.035
0.035
≤0.25
≤0.30
Cu≤0.25CK45#0.42-0.500.17-0.370.50-0.800.0350.035≤0.25≤0.30
Cu≤0.25Q345B≤0.20≤0.551.00-1.600.0400.040V:0.02-0.15Nb:0.015-0.06Ti:0.02-0.20Alt≥0.015ST52
E355
16Mn≤0.20≤0.551.00-1.600.0450.045V:0.02-0.15Nb:0.015-0.06Ti:0.02-0.2016Mn25Mn0.22-0.300.17-0.370.70-1.000.0350.035≤0.25≤0.25
27SiMn0.24-0.321.10-1.401.10-1.400.0300.030
42CrMo0.38-0.450.17-0.370.50-0.800.0250.0250.90-1.20
0.15-0.25
Dimension toleranceInnerDia(mm)IDTolerance(mm)WTTolerance(mm)H7H8H9H10H1130+0.021/0+0.038/0+0.052/0+0.084/0+0.130/0±5-10%>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+0.360/0
Product descriptionProcessing FormI. DLengthStraightnessI. D ToleranceI. D RounghnessCold-rolled30-100≤ 12M0.3-1.0H8-H100.4-1.6Cold-drawn30-250≤ 12M0.3-1.00.8-1.6Hone40-500≤ 12M1000H8-H90.4-0.8SRB40-400≤ 7M1000H8-H90.1-0.4