Stainless Steel Seamless Round Tube Polished Annealed High Corrosion Resistance
Our stainless steel seamless round tubes are manufactured through precision cold drawing or hot rolling processes, resulting in a uniform wall thickness, smooth surface finish, and complete absence of weld seams. These tubes offer excellent corrosion resistance, high-temperature performance, and reliable mechanical strength. They are widely used in fluid transport, structural support, and machinery manufacturing. Various surface finishes (annealed, pickled, polished, bright annealed) are available upon request.
| Parameter | Details |
|---|---|
| Standards | ASTM A269, A312, A213; EN 10216-5; GB/T 14976; JIS G3459 |
| Grades | 304, 304L, 316, 316L, 321, 310S, and others |
| Outer Diameter | 6 mm – 630 mm |
| Wall Thickness | 0.5 mm – 30 mm |
| Length | Fixed lengths 3m / 6m, or custom lengths available |
| Manufacturing Process | Cold drawn / Cold rolled / Hot rolled |
| Surface Condition | Annealed, pickled, polished, bright annealed |
| 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 |
Chemical compositions for other grades are available upon request or per applicable standards.
| Grade | Tensile Strength (MPa) min | Yield Strength (MPa) min | Elongation (%) min | Hardness (HB) max |
|---|---|---|---|---|
| 304 | 515 | 205 | 40 | 201 |
| 316 | 515 | 205 | 40 | 217 |
| 316L | 485 | 170 | 40 | 217 |
*Tested in accordance with ASTM E8 / E8M.*
- Oil, chemical, and natural gas transmission pipelines
- Food, pharmaceutical, and high-purity water systems
- Heat exchangers and boiler tubes
- Architectural and structural support
- Automotive, marine, and machined components
For quotes, technical data sheets, or custom specifications, please contact our sales team.
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.