Cold-Drawn Precision Tube
Precision tubes with tight tolerances for mechanical applications
Technical Specifications
Executive Standards
- GB/T 3639-2021 - Cold-drawn or cold-rolled precision seamless steel pipes (current standard, replacing GB/T 3639-2009)
Dimensions & Tolerances
Outer Diameter
4mm - 40mm+
Wall Thickness
High-precision control (±10%, minimum ±0.12mm))
Tolerance
Outer diameter 4-30mm: ±0.10mm; Outer diameter 31-40mm: ±0.15mm
Applications
- Automotive & Mechanical: Automotive, Motorcycle Hydraulic Systems, Pneumatic Components
- High-tech sectors: aircraft critical components, precision machinery, optical instruments, electronic devices
- Specialty Industries: Semiconductor Cleanroom Piping, Nuclear Facility Pressure Barriers, Refrigeration Equipment, Bearings
- condenser, evaporator, fuel line, oil line, etc.
- Typical length: 3000～12000mm. Tolerance for fixed/length multiples: ≤5000mm → +5mm; ＞5000mm → +10mm. Cutting allowance: 5～15mm
Key Features
- Ultra-high dimensional accuracy (tolerance ±0.10mm)
- Superior surface finish
- Cold drawing/cold rolling process
- Ideal for high-precision applications
- Material: Premium carbon steel, alloy steel
