| Payment Type: | L/C,T/T,D/P |
| Incoterm: | FOB,CFR,CIF,EXW |
| Transportation: | Ocean,Land,Express |
| Port: | Qingdao,Tianjin,Shanghai |
Model No.: St52
Standard: Bs, Gb, Astm, Jis, Din, Api
Material: Q195-Q345, 10#-45#, St35-St52, Cr-Mo Alloy
Section Shape: Round
Place Of Origin: China
Application: Fluid Pipe, Boiler Pipe, Hydraulic Pipe, Structure Pipe
Production Process: Cold Drawn
Certification: Bsi, Ce, Api
Special Tube: Thick Wall Pipe
Whether Alloy: Is Alloy
Tolerance: ±1%
Category: Seamless Steel Pipe
Processing Service: Cutting, Punching, Decoiling, Welding, Bending
Steel Grade: E355, St52.3, 1020, Ck45, 4140, 4130
Specification: 40mm*30mm-580mm*500mm
Bore Treatment: Honing, Skiving&Roller Burnishing
Conservation: Anti Rust Oiled Inside, Plastic Caps in Both Ends
| Selling Units | : | Ton |
| Package Type | : | Bundling and Seaworthy Packinge |
| Picture Example | : |
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Tube Products: honed tubes, honing pipe, hydraulic cylinder tubes, pneumatic cylinder tubes, honed pipe, honing tube, seamless honed steel tube, precision tubes, cold drawn honed tubes, skived tubes, skived and roller burnished tubes, skived pipes, SRB tube, SRB pipe, hydraulic SRB tube, hydraulic cylinder skived tubes
1.Description: Honed tube is a kind of smooth bore steel tube used to manufacture hydraulic cylinder barrels that is the core part of a piece of hydraulic cylinder. Honed tubes are widely used in hydraulic cylinders, cylinders, hydraulic machinery, engineering machinery, petroleum machinery, agricultural machinery, filling machinery, mining machinery and other fields.
Honing is a kind of machining technology. Through honing head, the inner hole of cold drawn pipe is processed by reciprocating high-speed grinding technology, so that the inner hole can meet the requirements of tolerance size and surface roughness that we need.
Honed tube is a kind of smooth bore steel tube used to manufacture hydraulic cylinder barrels that is the core part of a piece of hydraulic cylinder.
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.
2.Commodity: Cold drawn seamless honed tube for hydraulic cylinder
3.Size range: 40mm*30mm-580mm*500mm
4.Available steel grade:
| EN 10305-1 | E195, E235, E355, C35E, C45E, E410, E470, S355J2, S355J2G3, 25CrMo4, 34CrMo4, 42CrMo4 |
| DIN 2391-2 | ST37, ST44, ST52 |
| ASTM A519 | 1010, 1020, 1026, 1045, 1518, 1524, 1541, 4130, 4140, 4145, 4340, 8620 |
| JIS | STKM 13A, STKM 13B, STKM 13C |
| GB | Q345B, 25Mn, 16Mn, Q345D, Q345E, 20#, 45#, 20CrMo, 25CrMo, 30CrMo, 35CrMo, 42CrMo |
5. Manufacture method: Cold rolled, hydraulic cold drawn, hot rolled+deep hole boring
6. Delivery condition:
| BK | BKW | BKS | GBK | NBK | Q+T |
| +C | +LC | +SR | +A | +N | |
| Cold rolled | Cold drawn | Stress relieved | Annealed | Normalized | Quenched+Tempered |
7. Bore treatment: Honing, skiving&roller burnishing
8. Bore roughness control: Ra0.25um max or Ra0.35um max for honed tubes, Ra0.25um max for skived&roller burnished tubes.
9. End finish: Plain ends with square cuts, free of burrs for honed tubes. Little bevelled ends for skived&roller burnished tubes.
10. Standard export packing: In bundles tied with steel strips. Int&ext oil coating. End plastic caps. External packing by PVC bags and knit bags.
11. Customized packing and marking can be provided upon request.
12. 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.
Hydraulic steel tube is designed to convey liquid fluids to among hydraulics components, fittings, valves, flanges, and other tools. It is made of material E355 (ST 52.4) or E235 (ST 37.4). These two grades have different chemical composition. This helps to control the working pressure.
| Chemical Composition (%) | Carbon (C) | Silicon (Si) | Manganese (Mn) | Phosphorus (P) | Sulfur (S) |
| E355 (ST52.4) | ⩽ 0.22 | ⩽ 0.55 | ⩽ 1.6 | ⩽ 0.045 | ⩽ 0.045 |
| E235 (ST37.4) | ⩽ 0.17 | ⩽ 0.35 | ⩽ 1.2 | ⩽ 0.045 | ⩽ 0.045 |
Hydraulic honed tube is made according to DIN 2391/C (DIN EN 10305-1) or DIN 2445/2 (DIN EN 10305-4) standards and it is available in millimeters, inches outer diameter, and inches nominal bore size.
13. Hydraulic cylinder tube ------ Used in the hydraulic cylinder of the heavy machinery, Cranes, excavator also forklifts. Material is various, mainly STKM-13CT ST52 CK45 and 1020. We can work and get the mechanical property of the clients need and extended the life of the hydraulic cylinder.
14. Honed tube ----- used in Elevator buffer and Hydraulic Cylinder. This kind tube have a better roughness inner the tube,ra0.2-0.4um and can use directly in the hydraulic cylinder tube. Range: ID 50-250mm and Length can work at most 6M.
15. Cold finished tube ---- Widely Used. Processing range 30-300mm, biggest length is 11M.
| Hydraulic Cylinder Honing Tube | |||||
| Inside Dia (mm) | ID Tolerance (mm) | WT Tolerance (mm) | |||
| H7 | H8 | H9 | H10 | ||
| ≤30 | +0.021/0 | +0.033/0 | +0.052/0 | +0.084/0 | ±7.5% >210mm ±10% |
| 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 - ≤700 | +0.057/0 | +0.089/0 | +0.140/0 | +0.230/0 | |
| Steel Grade | Chemical Composition % | |||||
| C | Si | Mn | P | S | Al | |
| ≤ | ≥ | |||||
| 20# | 0.17-0.24 | 0.17-0.37 | 0.35-0.65 | 0.035 | 0.035 | / |
| 45# | 0.42-0.50 | 0.17-0.37 | 0.50-0.80 | 0.035 | 0.035 | / |
| Q345B | ≤0.2 | ≤0.5 | 1.00-1.60 | 0.03 | 0.03 | / |
| Q345D | ≤0.2 | ≤0.5 | 1.00-1.60 | 0.03 | 0.03 | 0.015 |
| 25Mn | 0.22-0.29 | 0.17-0.37 | 0.70-1.00 | 0.035 | 0.035 | / |
| 27SiMn | 0.24-0.32 | 1.10-1.40 | 1.10-1.40 | 0.035 | 0.035 | / |
| ST52 | ≤0.22 | ≤0.55 | ≤1.6 | 0.025 | 0.025 | / |
| SAE1026 | 0.22-0.28 | 0.15-0.35 | 0.60-0.90 | 0.04 | 0.05 | / |
| Delivery Condition | Cold Finished (hard) (BK) | Cold Drawn and Stress-relieved (BK+S) | |||
| Steel Grade | Tensile Strength | Elongation | Tensile Strength | Yield Strength | Elongation |
| 20# | ≥550 | ≥8 | ≥520 | ≥375 | ≥15 |
| 45# | ≥640 | ≥5 | ≥600 | ≥520 | ≥10 |
| 16Mn | ≥640 | ≥5 | ≥600 | ≥520 | ≥14 |
| 25Mn | ≥640 | ≥5 | ≥600 | ≥510 | ≥15 |
| 27SiMn | ≥800 | ≥5 | ≥760 | ≥610 | ≥10 |
| ST52 | ≥640 | ≥5 | ≥600 | ≥520 | ≥14 |
| SAE1026 | ≥640 | ≥5 | ≥600 | ≥510 | ≥15 |
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