Audited Supplier
One Year
One Year
Seamless
Cold Rolled, Cold Drawn, Finish Rolled
Carbon Steel, Alloy Steel, Stainless Steel
Pickling, Phosphorization, Polishing
Boiler Pipe, Hydraulic/Automobile Pipe, Oil/Gas Drilling, Food/Beverage/Dairy Products, Machinery Industry, Chemical Industry, Mining, Construction & Decoration, Special Purpose
Round
8mm~140mm
0.8mm~20mm
6meters, 9meters, 12meters, Random Length
Annealing Bright, Phosphating
+/- 0.05mm
Iron&steel
Bundled, Wrapped, Wooden Cased.
DIN2391
China
73041990
Product Description
Precise Seamless steel pipe by cold drawn/cold rolling
OD: 8mm~140mm
Wall thickness: 0.8mm~20mm
Tolerance: +/-0.1mm
Technique: Cold drawing/Cold rolling
Standard: ASME SA192/SA179, GB/T8162, GB/T8163, GB/T3639, DIN2391-2
Steel material: 20#(AISI 1020/DIN1.0402 C22), 45#(ASTM 1045,DIN45), 20Cr, 40Cr, ST52, ST45, ST37.4, Q345B, etc
Delivery state: BK, BKW, NBK, GBK, BKS
Usage: widely used for mechanical processing, Automobile industry, hydraulic equipments
Advantages of our high precision seamless steel pipe:
1. Smaller caliber
2. Accept small qty order
3. Good surface treatment
4. The pipe with superior performance, suitable for mechanical making
Introduction of delivery state
| Designation | Symbol | Description |
| Cold finished (hard) | BK | Tubes do not undergo heat treatment following the final cold forming and,thus, have a rather high resistance to deformation |
| Cold finished (soft) | BKW | The final heat treatment is followed by cold drawing involving limited deformation.Appropriate further processing allows a certain degree of cold forming(e.g. bending expanding). |
| Cold finished and stress-relleved | BKS | Heat treatment is applled following the last cold forming process. Subject to appropriate processing conditions, the increase in the residual stresses involved enables both forming and machining to a certain degree |
| Annealed | GBK | The last cold forming process is followed by annealing in a controlled atmosphere |
| Normalized | NBK | The last cold forming process is followed by annealing above the upper transformation point in a controlled atmosphere |
| OD (mm) | Thickness (mm) | OD (mm) | Thickness (mm) | OD (mm) | Thickness (mm) | OD (mm) | Thickness (mm) |
| Φ13.1 | 1.5-3 | Φ35.5 | 1.5-7 | Φ46.1 | 1.5-10 | Φ93 | 1.5-15 |
| Φ19.25 | 1.5-5 | Φ35.9 | 1.5-7 | Φ47.8 | 1.5-10 | Φ19-Φ121 | 1.5-15 |
| Φ22 | 1.5-5 | Φ36.6 | 1.5-7 | Φ49.2 | 1.5-10 | ||
| Φ22.2 | 1.5-5 | Φ38 | 1.5-8 | Φ49.5 | 1.5-10 | ||
| Φ25 | 1.5-6 | Φ38.4 | 1.5-8 | Φ52.3 | 1.5-10 | ||
| Φ26.3 | 1.5-6 | Φ40 | 1.5-10 | Φ53.8 | 1.5-10 | ||
| Φ27 | 1.5-6 | Φ40.2 | 1.5-10 | Φ57 | 1.5-10 | ||
| Φ28 | 1.5-6 | Φ40.9 | 1.5-10 | Φ59 | 1.5-10 | ||
| Φ30 | 1.5-6 | Φ41.3 | 1.5-10 | Φ60 | 1.5-11 | ||
| Φ30.25 | 1.5-6 | Φ41.6 | 1.5-10 | Φ62.5 | 1.5-11 | ||
| Φ30.9 | 1.5-6 | Φ42 | 1.5-10 | Φ74 | 1.5-11 | ||
| Φ31 | 1.5-7 | Φ43 | 1.5-10 | Φ75 | 1.5-11 | ||
| Φ32 | 1.5-7 | Φ44.5 | 1.5-10 | Φ76 | 1.5-11 | ||
| Φ35 | 1.5-7 | Φ45.8 | 1.5-10 | Φ89 | 1.5-15 |
| OD | Standard tolerance | Special tolerance | |||
| Outer Diameter | GB/T3639 | DIN2391 | EN10305 | O D | thickness |
| 4mm-20mm | ±0.10 mm | ±0.08 mm | ±0.08 mm | ±0.05mm | ±0.05mm |
| 20mm-30mm | ±0.10 mm | ±0.08 mm | ±0.08 mm | ±0.08 mm | ±0.08 mm |
| 31mm-40mm | ±0.15 mm | ±0.15 mm | ±0.15 mm | ±0.10 mm | ±0.08 mm |
| 41mm-60mm | ±0.20 mm | ±0.20 mm | ±0.20 mm | ±0.15 mm | ±0.15 mm |
| 61mm-80mm | ±0.30 mm | ±0.30 mm | ±0.30 mm | ±0.20 mm | ±0.20 mm |
| 81mm-120mm | ±0.45 mm | ±0.40 mm | ±0.40 mm | ±0.30 mm | ±0.30 mm |
| Material | Chemical composition (%) | ||||||
| C | Mn | P | S | Si | Ni | Cu | |
| 20# AISI 1020 | 0.17~0.23 | 0.35~0.65 | ≤0.035 | ≤0.035 | 0.17~0.37 | ≤0.3 | ≤0.25 |
| 45# ASTM1045, DIN45 | 0.42~0.5 | 0.5~0.8 | ≤0.04 | ≤0.045 | 0.17~0.37 | ≤0.25 | ≤0.25 |
| Steel material | Tensile Strength Mpa | Yield strength Mpa | Elongation % | Hardness | Straightness |
| 20# | ≥510 | ≥245 | ≥25 | ≤156HB | 0.3~1.0 |
| 45# | ≥647 | ≥355 | ≥16 | ≤HRC62 | 0.3~1.0 |
