ISO Standard Honed Cylinder BKS Finished Cold Drawn Seamless Steel Tube
Commodity name: ISO standard honed cylinder BKS finished cold drawn seamless steel tube
1.Grade: 20#(aisi1020,ck20),45#(ck45,aisi1045),st52(16Mn,Q345D),25Mn,27SiMn,42CrMO
2.ID:30-250mm
3.ID tolerance:H8,H9
4.Surface roughness:Ra 0.02— 0.4μm
5. Final supply condition:cold drawn and stress-relieved(BK+S
6. Machining allowance:0.5-1.5mm
7.Wall thickness:10%×ID
Variety
Processing |
Cylinder Diameter |
Straightness |
Size Accuracy |
W.T/mm |
Inner Bore Roughess |
|
Cold drawn/ cold rolled |
ID30-250 |
0.3 |
H9-H11 |
±10% |
0.4~1.6um |
Honed tube |
ID50-250 |
0.3 |
H7-H9 |
±10% |
<0.4um |
Mechanics performance
Material |
Tensile strength |
Yield strength |
Elongation |
Hardness |
Ck20/20#/AISI1020 |
>520 N/ mm2 |
>375 N/mm2 |
>15% |
>85HB |
Ck45/45#/AISI1045 |
>600 N/ mm2 |
>520 N/ mm2 |
>15% |
>85HB |
ST52/16Mn/Q345D |
>600 N/ mm2 |
>520 N/ mm2 |
>15% |
>85HB |
25Mn/STKM 13C-T |
>600 N/ mm2 |
>530 N/ mm2 |
>15% |
>85HB |
Dimension tolerance
ID size |
ID deviation (mm) |
|||
H7 |
H8 |
H9 |
H10 |
|
30 |
+0.021 0 |
+0.033 0 |
+0.052 0 |
+0.084 0 |
>30~50 |
+0.025 0 |
+0.039 0 |
+0.062 0 |
+0.100 0 |
>50~80 |
+0.030 0 |
+0.046 0 |
+0.074 0 |
+0.120 0 |
>80~120 |
+0.035 0 |
+0.054 0 |
+0.087 0 |
+0.140 0 |
>120~180 |
+0.040 0
|
+0.063 0 |
+0.100 0 |
+0.160 0 |
>180~250 |
+0.046 0 |
+0.072 0 |
+0.115 0 |
+0.185 0 |
>250~315 |
+0.052 0 |
+0.081 0 |
+0.130 0 |
+0.210 0 |
>315~400 |
+0.0527 0 |
+0.089 0 |
+0.140 0 |
+0.230 |
Delivey conditions
- Standard packing with plastic caps and strapped bundles.
- Commercial length 2000~10500mm,custom lengths upon request
- Surface protection
We can supply cold drawn steel pipe,honed tube,hydraulic pipe,hydraulic cylinder tube.
- Pretreatment : Acid cleaning- Parkerizing
- Cold drawn/cold rolled
- Annealing furnace—— stress-relieving (+SR)
- Straightener—— Straightening/ Leveling
- Straightness inspecting
- Dimension inspecting
- Sawing off not good parts

- Lathe
- Surface Polishing
- Finished Products
Any need or intrest, please feel free to contact us!
Send Inquiry to This Supplier
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