Audited Supplier
One Year
One Year
Seamless
Cold Drawn and Honing
Alloy, Carbon Steel
Bare Pipe
Boiler Pipe, Hydraulic/Automobile Pipe, Machinery Industry, Chemical Industry, Special Purpose
Round
30mm~416mm
Fixed Length, by Random
Plain Ends
Bare Pipe, Anti-Rust Painting
St52, Q345b, 27simn, 15CrMo,40cr, 20cr,etc
Iron&steel
Standard Seaworthy Packing
ASTM, DIN, GB/T
China
73045910
Product Description
Honing/Roller burnishing Steel Pipe is a kind of smooth bore steel tube which is used to manufacture hydraulic cylinder barrels that is the core part of cylinder unit
Size range: 40mm*30mm-580mm*500mm
Available steel grade:
| SAE/AISI: | SAE1020, SAE1026, SAE1045, SAE4130, SAE4140 |
| DIN: | ST52, ST52.3, ST52.4 |
| EN: | E355, C45E, 25CrMo4, 42CrMo4, CK45, S45C, E410, E470 |
| GB: | 20#, 45#, 16Mn, Q345B, Q345C, Q345D, Q345E, 25Mn, 27SiMn, |
Manufacture method: Cold rolled, hydraulic cold drawn, hot rolled+deep hole boringDelivery condition:
| BK | BKW | BKS | GBK | NBK | Q+T |
| +C | +LC | +SR | +A | +N | |
| Cold rolled | Cold drawn | Stress relieved | Annealed | Normalized | Quenched+Tempered |
Bore treatment: Honing, skiving&roller burnishing
Bore roughness control: Ra0.25um max or Ra0, 35um max for honed tubes, Ra0.25um max for skived&roller burnished tubes.
End finish: Plain ends with square cuts, free of burrs for honed tubes. Little bevelled ends for skived&roller burnished tubes.
Standard export packing: In bundles tied with steel strips. Int&ext oil coating. End plastic caps. External packing by PVC bags and knit bags.
Customized packing and marking can be provided upon request.
H8 tolerance:
| ID range | Tolerance | ID range | Tolerance |
| 18< d ≤30 | +0/+0.033 | 180< d ≤250 | +0/+0.072 |
| 30< d ≤50 | +0/+0.039 | 250< d ≤300 | +0/+0.081 |
| 50< d ≤80 | +0/+0.046 | 300< d ≤315 | +0/+0.081 |
| 80< d ≤120 | +0/+0.054 | 315< d ≤400 | +0/+0.089 |
| 120< d ≤180 | +0/+0.063 | 400< d ≤500 | +0/+0.097 |
Difference between honed tube and skived&roller burnished tube: In hydraulic cylinder industry, there are 2 solutions for bore treatment: Honing, and skiving&roller burnishing. Honing or skiving&roller burnishing leads to different internal surface image, but both ensure good roughness.
Processing form | I.D.mm | Length | Straightness | I.D.tolerance | I.D.Roughness(RA) |
Cold-rolled | 30-100 | ≤12M | 0.3-1.0/1000 | H8-H10 | 0.4-1.6um |
Cold-drawn | 30-250 | ≤12M | H8-H10 | 0.8-1.6um | |
Hone | 40-500 | ≤12M | H8-H9 | 0.4-0.8um | |
SRB | 50-250 | ≤9M | H8 | 0.1-0.4um |
Cutting length upto buyer's request, Advanced numerical control cutter guarantee the pipe ends free from burrs and curling edges.
