ASTM A213 TP321 Stainless Steel Seamless Boiler Tubes
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ASTM A213 TP321 stainless steel seamless boiler tubes are engineered for high-temperature and high-pressure service in boiler and heat exchanger applications. ASTM A213 TP321 stainless steel annealed tubes have a minimum yield strength of 205 MPa, tensile strength of 515-690 MPa, and elongation of at least 40%, ensuring structural integrity under extreme conditions; they are designed for continuous operation at temperatures up to 900°C, with outstanding resistance to scaling, oxidation, and corrosion from steam, water, and acidic environments.
TP321 stainless steel boiler tubes are manufactured to ASTM A213/ASME SA213 standards, with outer diameters ranging from 12.7mm (1/2 inch) to 114.3mm (4.5 inches), wall thicknesses from 1.24mm (0.049 inch) to 6.0mm (0.236 inch), and a surface finish of 180-240 grit (Ra ≤ 0.8μm) to enhance cleanliness and thermal efficiency in heat transfer applications.
Equivalent Grades for 321 Stainless Steel Tubing
| Gr. | UNS No. | Old British | Euro Norm | Swedish | Japanese |
| TP321 | S32100 | 321S31 | 1.4541 | SS2337 | JIS SUS 321 |
tp 321 Stainless Steel Tube Mechanical Properties Chemical Composition % Max
| C | Mn | P | S | Si | Cr | Ni | Ti |
| 0.08 | 2 | 0.045 | 0.03 | 1 | 17-19 | 9-12 | 5(C + N)- 0.70 |
ASTM A213 TP 321 Stainless steel heat exchanger tubes Mechanical Property
| Gr. | Tensile Strength min | Yield Strength min | Elongation (%) | Brinel/Vickers | Rockwell |
| TP321 | 75ksi ( 515MPa ) | 30ksi ( 205MPa ) | 35 min | 192HBW/200HV | 90HRB |
ASTM A213 TP321 stainless steel boiler tubes Applications
ASTM A213 TP 321 seamless tubes are made from stainless steel billets. After cold drawing and cold rolling, they are heat treated at a specific temperature. The finished seamless tubes are primarily used in boilers, heat exchangers, and superheater systems.
GNEE manufactures ASTM A213 TP 321 seamless stainless steel pipe. Annealed, pickled, and pickled, the seamless pipe is available in a wide range of sizes and specifications. Dimensional tolerances are tight and precise. Unless average wall thickness is required, the wall thickness tolerance should be a plus of the minimum thickness.
ASTM A213 TP 321 Seamless Tube Specifications
| Standard | ASTM A213/ASME SA213 |
|---|---|
| Grade | TP321 stainless steel |
| Tube Type | Seamless Tube |
| Finishes | Annealing Pickling Bright Annealing |
| Outside Diameter | 1/8″ – 5″ |
| Thickness | 0.015″ – 0.500″ |
| Length | Fixed And Random Length |
| Application | Boiler, Heat Exchanger, Super Heater |
In addition we also provide the following ASTM A213 stainless steel pipes.
Packing and Marking
Packed in bundles or ply wooden box wrapped in plastic, and suitably protected for sea-worthily delivery or as requested.
