ASTM A269 TP321 Annealed Pickling Seamless Tube
Material：Stainless Steel
Surface Treatment：Polish, Sandblasting, Pickling
Shape：Round
Technicial：Cold Rolling/Drawing
Outside Diameter：3.18-810mm
Wall Thickness：0.2-40mm
Size：8"-72"(DN200-DN1800)/219.1mm-1829mm
Standard：ASTM A312, ASTM A213, ASTM A269, etc.
Transport Package：with Plastic Caps on Both End, Pack Into Bundle
What is ASTM A269 TP321 Annealed Pickling seamless tube?
ASTM A269 is a standard specification developed by ASTM International for seamless and welded austenitic stainless steel tubing intended for general service. TP321 stainless steel tube is a titanium-stabilized grade that resists carbide precipitation, making it well-suited for continuous operation at temperatures up to 870°C (1600°F).
ASTM A269 TP321 Annealed seamless tube
What are the advantages of ASTM A269 TP321 annealed pickled tubes?
ASTM A269 TP321 annealed tube undergoes heat treatment to eliminate cold work hardening and restore ductility, resulting in a hardness of ≤200 HB and elongation of ≥35%, which facilitates subsequent processes such as bending and flaring.
Following annealing, the ASTM A269 TP321 pickled tube is treated to remove surface oxides. The inner surface roughness is ≤1.6 μm (Ra), and the tube has a bright, silver-white appearance. This process also activates the passive layer, enhancing corrosion resistance.
Compared with black annealed tubes, ASTM A269 TP321 annealed and pickled tubes offer a significantly cleaner surface and up to 20% improved corrosion resistance, making them ideal for hygienic applications in the food, pharmaceutical, and other sanitary industries.
ASME SA269 Grade 321 Seamless Tubing Specifications
| Property | Value |
|---|---|
| Standard | ASTM A269 / ASME SA269 |
| Material Grade | TP321 (UNS S32100) |
| Process | Cold drawn + Annealed + Pickled |
| Outer Diameter Range | 6 mm – 101.6 mm (customizable) |
| Wall Thickness | 0.5 mm – 5 mm |
| Length | 6 meters (or per requirement) |
| Surface Finish | Annealed & Pickled (AP) |
| Tensile Strength (min) | 515 MPa |
| Yield Strength (min) | 205 MPa |
| Elongation (min) | 35% |
| Hardness (max) | 90 HRB |
chemical composition of TP321 Stainless steel pickling pipe
| Element | Content (%) |
|---|---|
| C | ≤ 0.08 |
| Cr | 17.0 – 19.0 |
| Ni | 9.0 – 12.0 |
| Ti | ≥ 5 × (C + N) |
| Mn | ≤ 2.00 |
| Si | ≤ 1.00 |
| P | ≤ 0.045 |
| S | ≤ 0.030 |
Why choose GNEE
GNEE supplies ASTM A269 TP321 seamless tubes with:
Mill Test Certificates (EN 10204 3.1)
Ultrasonic or Eddy Current testing reports
Tight tolerances and custom lengths
Polished surface available: Ra ≤ 0.8μm or mirror polished (Ra ≤ 0.2μm)
Export-standard packing for sea freight
Get a free quote now and receive samples upon request!
GNEE FACTORY ENVIRONMENT
GNEE Stainless Steel Testing
GNEE PACKAGING AND SHIPPING
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