Precision Cold Drawn Stainless Steel Seamless Tube Bright Annealed Stainless Steel Tubing
The Cold-Drawn Stainless Steel Seamless Tube is manufactured through a precision cold-drawing process that enhances dimensional accuracy, surface finish, and mechanical properties. This method involves pulling a hollow billet through a die at room temperature, resulting in a uniform wall thickness, tight tolerances, and a smooth, weld-free surface. The cold-working process also increases tensile and yield strength compared to hot-rolled tubes. Ideal for high-pressure, high-precision, and critical environment applications.
| Parameter | Details |
|---|---|
| Standards | ASTM A269, A312, A213; EN 10216-5; GB/T 14976; JIS G3459 |
| Available Grades | 304, 304L, 316, 316L, 321, 310S, 347, Duplex 2205 |
| Outer Diameter | 3 mm – 350 mm |
| Wall Thickness | 0.5 mm – 25 mm |
| Length | Fixed lengths 3m / 6m, or custom lengths upon request |
| Manufacturing Process | Cold drawn (multiple passes with intermediate annealing) |
| Surface Finish | Bright annealed, pickled, polished, or as required |
| Tolerances | High precision – ±0.05 mm to ±0.1 mm depending on size |
| Grade | C ≤ | Si ≤ | Mn ≤ | P ≤ | S ≤ | Cr | Ni | Mo |
|---|---|---|---|---|---|---|---|---|
| 304 | 0.08 | 0.75 | 2.00 | 0.045 | 0.030 | 18.0-20.0 | 8.0-10.5 | – |
| 316 | 0.08 | 0.75 | 2.00 | 0.045 | 0.030 | 16.0-18.0 | 10.0-14.0 | 2.0-3.0 |
| 316L | 0.03 | 0.75 | 2.00 | 0.045 | 0.030 | 16.0-18.0 | 10.0-14.0 | 2.0-3.0 |
Composition for other grades available upon request or per applicable standards.
Note: Cold-drawn tubes typically exhibit higher strength than annealed tubes due to work hardening.
| Grade | Condition | Tensile Strength (MPa) min | Yield Strength (MPa) min | Elongation (%) min | Hardness (HB) max |
|---|---|---|---|---|---|
| 304 | Cold drawn (as-drawn) | 620 | 515 | 15 | 201 |
| 304 | Annealed | 515 | 205 | 40 | 201 |
| 316 | Cold drawn (as-drawn) | 620 | 515 | 15 | 217 |
| 316 | Annealed | 515 | 205 | 40 | 217 |
| 316L | Cold drawn (as-drawn) | 585 | 480 | 15 | 217 |
| 316L | Annealed | 485 | 170 | 40 | 217 |
Tested in accordance with ASTM E8 / E8M. Annealed condition available upon request.
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High-pressure hydraulic and pneumatic systems
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Precision instrument tubing
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Automotive fuel injection lines
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Medical device components
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Chemical and petrochemical processing
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Heat exchangers and condensers
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Aerospace and defense components
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Food and beverage processing equipment
For inquiries, technical datasheets, or custom sizes, please contact our sales team.
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