| Material | Carbon Steel / Stainless Steel / Alloy Steel / Copper / Aluminum (options available) |
| Common Grades | Carbon: ST37.4, ST52, 1020, 1045 Stainless: 304, 304L, 316, 316L, 321 Alloy: 4130, 4140, 25CrMo4 Aluminum: 6061, 6063 |
| Tube Type | Seamless (cold-drawn / cold-rolled) or Welded (TIG / laser) |
| Outer Diameter (OD) | 3 mm – 200 mm (±0.03 – ±0.10 mm depending on size) |
| Wall Thickness | 0.5 mm – 20 mm (±0.02 – ±0.08 mm) |
| Length | 3 m – 12 m (custom cut-to-length available) |
| Surface Finish | Bright annealed / Pickled & passivated / Polished / Oiled / Black (as-drawn) |
| Tolerance Class | ISO 2960 / EN 10305 / ASTM A519 (high-precision) |
| Straightness | ≤ 0.5 mm per meter |
| Surface Roughness (Ra) | ≤ 0.8 μm (bright annealed) / ≤ 1.6 μm (as-drawn) |
| End Finish | Plain ends / Beveled / Threaded / Grooved (per customer request) |
| Country of Origin | China |
| Export Port | Shanghai Port / Ningbo Port / Shenzhen Port (flexible) |
| Packaging | Hexagonal bundles with plastic end caps + woven fabric or steel strapping; OD > 50 mm individually wrapped |
| Delivery Time | 20 – 40 days after order confirmation (depends on quantity and specification) |
| Quality & Testing | 100% eddy current / ultrasonic testing; hydrostatic test; dimensional inspection; chemical & mechanical certification (EN 10204 3.1 / 3.2 available) |