Product Overview – ASTM A213 TP321 Seamless Tubes
ASTM A213 TP321 seamless tubes are titanium-stabilized stainless steel tubes designed to prevent chromium carbide precipitation during welding and high-temperature exposure. The addition of titanium binds carbon and enhances resistance to intergranular corrosion.
Unlike standard 304 stainless steel tubes, TP321 provides improved stability at elevated temperatures, making it particularly suitable for high-temperature industrial environments.
These seamless tubes are manufactured through precision cold drawing or hot finishing processes to achieve tight dimensional tolerance, smooth surface finish, and excellent mechanical integrity.
ASTM A213 TP321 tubes are widely used in boilers, heat exchangers, petrochemical processing plants, furnace components, and power generation equipment where long-term thermal stability and corrosion resistance are required.
Standard & International Identification - ASTM A213 TP321 Seamless Tubes
Technical Specifications – TP321 Seamless Tubes
| Tube Type: | Seamless Stainless Steel Tubes |
| Manufacturing Process: | Cold Drawn / Hot Finished |
| Outer Diameter: | 6 mm to 273 mm |
| Wall Thickness: | 1 mm to 30 mm |
| Length Options: | Random / Cut Length / U-Bend Tubes |
| Surface Finish: | Bright Annealed / Pickled & Annealed |
| Testing Standards: | Hydrostatic Test, Eddy Current Test,Ultrasonic Testing, PMI |
| Certification : | EN 10204 3.1 / 3.2 MTC |
Third Party Inspection Available
All specifications are in accordance of ASTM A213 / ASME SA213 standards. Mechanical and chemical values are as per standard limits. Mill Test Certificates (MTC) available upon request.
Chemical Composition – Stainless Steel TP321
(As per ASTM specification)
| Element | Max (%) |
|---|---|
| Carbon (C): | 0.08% |
| Manganese (Mn): | 2.00 % |
| Silicon (Si): | 1.00% |
| Phosphorus (P): | 0.045 % |
| Sulfur (S): | 0.030 % |
| Chromium (Cr): | 17.0-19.0% |
| Nickel (Ni): | 9.0-12.0% |
| Titanium (Ti): | 5 × Carbon minimum to 0.70% |
| Iron : | Balance |
Note: The titanium addition stabilizes the steel structure and improves resistance to sensitization during welding and high temperature service.
Mechanical Properties – ASTM A213 TP321 Tubes
| Property | Minimum Value |
|---|---|
| Tensile Strength | 515 MPa |
| Yield Strength | 205 MPa |
| Elongation | 35% |
These properties ensure structural stability in demanding pressure and temperature environments.
High Temperature Performance of SS 321 Tubes
Stainless Steel 321 tubes perform exceptionally well in elevated temperature environments due to their titanium stabilization.
Key high-temperature advantages include:
Because of these characteristics, TP321 is frequently used in thermal processing plants and refinery furnace equipment.
Major Industrial Applications of TP321 Seamless Tubes
- ASTM A213 TP321 seamless stainless steel tubes are commonly used in:
- 🔸Heat Exchanger Systems
- 🔸Petrochemical Processing Plants
- 🔸Refinery Furnace Equipment
- 🔸Boiler and Superheater Systems
- 🔸Power Generation Plants
- 🔸Chemical Processing Equipment
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