Product Description：
Precision bright tube is a high-precision steel pipe material processed through precision rolling or cold drawing. Due to its advantages such as no oxide layer on the inner and outer walls, no leakage under high pressure, high precision, high smoothness, no deformation in cold bending, no cracks in expanding or flattening, it is mainly used to produce pneumatic or hydraulic components, such as cylinders or oil cylinders, which can be seamless or welded tubes. The chemical composition of precision bright tube includes carbon (C), silicon (Si), manganese (Mn), sulfur (S), phosphorus (P), and chromium (Cr). It is used in precision seamless tubes for automobiles, motorcycles, construction machinery, jacks, power tools, sports equipment, and other fields.
| Product List |
| Product Name: | 10# Precision Bright Tube | Seamless Steel Tube |
| Product Name: | 20# Precision Bright Tube | Seamless Steel Tube |
| Product Name: | 45# Precision Bright Tube | Seamless Steel Tube |
| Product Name: | Q235 Precision Bright Tube | Seamless Steel Tube |
| Product Name: | Q345 Precision Bright Tube | Seamless Steel Tube |
| Product Name: | 16Mn Precision Bright Tube | Seamless Steel Tube |
| Product Name: | 40Cr Precision Bright Tube | Seamless Steel Tube |
| Product Name: | 27SiMn Precision Bright Tube | Seamless Steel Tube |
| Product Name: | 12Cr1MoV Precision Bright Tube | Seamless Steel Tube |
| Product Name: | 15CrMo Precision Bright Tube | Seamless Steel Tube |
| Parameter range |
| Outer diameter | 6mm-219mm |
| Wall thickness | 0.5mm - 20mm (Note: subject to OD) |
| Standard length | 1m - 12m (Random or Fixed) |
| Outer diameter accuracy | ±0.03mm - ±0.1mm (According to DIN 2391/ASTM) |
| Executive Standards | GB/T 3639, DIN 2391, ASTM A519, JIS G3445 |
| Non-standard customization | Non-standard sizes & lengths available |
| Commonly used high-frequency specifications in the market (outer diameter x wall thickness mm) |
| Outer diameter (mm) | 10
| 12 | 14 | 16 | 18 | 20 | 25
| 28 | 30 |
| Common wall thickness (mm) | 1-2.0 | 1-2.5 | 1-3.0 | 1-3.0 | 1.5-3.5 | 1.5-4.0 | 2-4.5 | 2-5 | 2-6 |
| Outer diameter (mm) | 32 | 35 | 38 | 42 | 45 | 50 | 57 | 60 | 63 |
| Common wall thickness (mm) | 2-6 | 2-7 | 2-8 | 2-8 | 2-10 | 2-10 | 3-12 | 3-12 | 3-14 |
| Addendum: Precision tubes for oil cylinders Priority should be given to GB/T 8713 (Precision Seamless Steel Pipe for Hydraulic and Pneumatic Applications) for oil cylinder barrels, with a straightness of ≤ 1mm/m and a higher inner diameter tolerance grade of S3/D3. |
Optional tolerance range |
| Tolerance control | Optional manufacturing process |
| Tolerance ≤ 0.05 mm | Cold rolling |
| Tolerance ≤ 0.10 mm | Cold rolling |
| Tolerance ≤ 0.30 mm | Cold drawing | Cold rolling |
| Tolerance ≤ 0.50 mm | Cold drawing | Hot rolling |
| Tolerance ≤ 1.00 mm | Hot rolling | Hot expanding |
| Outer diameter tolerance (cold working state+C/+LC) |
| Outer diameter (mm) | 5-10 | 10-20 | 20-30 | 30-40 | 40-50 | 50-60 | 60-80 | 80-100 | 100-120 | 120-150 |
| Allowable deviation (mm) | ±0.08 | ±0.10 | ±0.15 | ±0.20 | ±0.25 | ±0.30 | ±0.35 | ±0.45 | ±0.50 | ±0.75 |
Heat treatment state (+SR+A+N): The tolerance of the thin-walled tube is increased by 1.5-2 times, and the S/D ratio is observed Wall thickness tolerance: ± 10% S, minimum ± 0.10mm, whichever is greater |
Optional delivery status
|
| Oil removal from oil pipes | Annealing and straightening | Steel pipe corrosion prevention |
| Steel pipe threading | Length cut-to-length | Steel pipe coating |
| Steel pipe cap | Exquisite bundling | Beveling |
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