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Providing high quality, low priced Cold Rolled/Cold Drawn Seamless steel pipes. With 15 advanced production lines, we manufacture a full range of sizes in carbon and alloy steel materials.
High precision cold drawn seamless steel tube identifies the precision steel pipe with high dimension precision (inside diameter and outside diameter). It features a superior surface finish, excellent roundness, straightness, and uniform wall thickness. Widely utilized in mechanical structures and hydraulic gym equipment, these tubes significantly reduce machining time and enhance product quality.
| Designation | Symbol | Description |
|---|---|---|
| Cold finished (hard) | BK | Tubes do not undergo heat treatment following the final cold forming; high resistance to deformation. |
| Cold finished (soft) | BKW | Final heat treatment followed by limited cold drawing. Allows certain degree of cold forming (bending/expanding). |
| Cold finished and stress-relieved | BKS | Heat treatment applied after the last cold forming process. Enables both forming and machining. |
| Annealed | GBK | Last cold forming process is followed by annealing in a controlled atmosphere. |
| Normalized | NBK | Last cold forming process followed by annealing above the upper transformation point in controlled atmosphere. |
| OD (mm) | Thickness (mm) | OD (mm) | Thickness (mm) | OD (mm) | Thickness (mm) |
|---|---|---|---|---|---|
| Φ13.1 | 1.5-3 | Φ35.5 | 1.5-7 | Φ93 | 1.5-15 |
| Φ22 | 1.5-5 | Φ40 | 1.5-10 | Φ19-Φ121 | 1.5-15 |
| Φ25 | 1.5-6 | Φ44.5 | 1.5-10 | Φ121-Φ200 | 8.0-25 |
| Φ30 | 1.5-6 | Φ57 | 1.5-10 | Φ200-Φ315 | 10-30 |
| Material | C | Mn | P | S | Si |
|---|---|---|---|---|---|
| 20# / AISI 1020 | 0.17~0.23 | 0.35~0.65 | ≤0.035 | ≤0.035 | 0.17~0.37 |
| 45# / ASTM 1045 | 0.42~0.5 | 0.5~0.8 | ≤0.04 | ≤0.045 | 0.17~0.37 |
| Steel Grade | Tensile Strength (Mpa) | Yield Strength (Mpa) | Elongation (%) | Hardness |
|---|---|---|---|---|
| 20# | ≥510 | ≥245 | ≥25 | ≤156HB |
| 45# | ≥647 | ≥355 | ≥16 | ≤HRC62 |
Our professional exporting team guarantees top-quality packing and shipment services. Pipes can be bundled, wrapped, or wooden cased to ensure safe transport.
