Nascent Pipe & Tubes is a leading manufacturer and supplier of premium-grade Stainless Steel 321 Tubes, offering exceptional durability, oxidation resistance, and performance in high-temperature applications. SS 321 is an austenitic stainless steel stabilized with titanium, making it highly resistant to intergranular corrosion even after exposure to high temperatures. Manufactured according to ASTM A213 TP321 and UNS S32100, these tubes are widely used in heat exchangers, chemical processing, oil refineries, aerospace systems, and exhaust manifolds due to their superior thermal stability and excellent mechanical strength.
The SS 321 seamless tubes and welded tubes offered by Nascent Pipe & Tubes are precision-engineered to meet global standards and client-specific requirements. We ensure the material composition is optimized with titanium content to eliminate carbide precipitation during welding and high-temperature exposure. The result is a product that maintains structural integrity and corrosion resistance across a wide range of demanding environments.
Stainless Steel 321 Tubes Manufacturers, Stainless Steel 321 Tubes Suppliers, Stainless Steel 321 Tubes Stockists, Stainless Steel 321 Tubes Exporters
Stainless Steel 321 Tubes Manufacturers in India, Stainless Steel 321 Tubes Suppliers in India, Stainless Steel 321 Tubes Stockists in India, Stainless Steel 321 Tubes Exporters in India
Our Stainless Steel 321 tubing provides an ideal solution for applications requiring consistent performance in temperatures ranging from 800°F to 1500°F (427°C to 816°C). Unlike the 304 series, SS 321 is designed specifically to resist scaling and stress-rupture corrosion, which makes it an excellent choice in furnace parts, heat exchanger tubes, and jet engine parts. These properties make the tubes extremely reliable in industries like petrochemical, power generation, marine, and aerospace.
Stainless Steel 321 Tubes Manufacturers In Mumbai, Stainless Steel 321 Tubes Suppliers In Mumbai, Stainless Steel 321 Tubes Stockists In Mumbai, Stainless Steel 321 Tubes Exporters In Mumbai
By offering fast delivery, competitive pricing, and excellent customer service, Nascent Pipe & Tubes has earned a reputation as a reliable source for Stainless Steel 321 seamless tubes and welded tubes in India and across international markets. Our SS 321 Tubes are not only compliant with ASTM A213 specifications but also compatible with equivalent standards such as ASME SA213, EN 10216-5, DIN 17458, and ISO 1127.
Specification of Stainless Steel 321 Seamless Tubes
Stainless Steel Pipe Specification : ASTM A312, A358 / ASME SA312, SA358
SS Tube Specification : ASTM A213, A269, A249, A511, A554 / ASME SA213, SA269, SA249, SA511, SA554
Pipe Size :1/8” NB to 24” NB, 1/4” OD to 24” OD sizes.
Tube Size :1/2" OD to 8" OD.
Thickness Range :0.3mm – 50 mm, SCH 5, SCH10, SCH 40, SCH 80, SCH 80S, SCH 160, SCH XXS, SCH XS
Type :Seamless / ERW / Welded / Fabricated Tubes
Form : Round, Square, Rectangular, Oval, Hydraulic Etc
Length :Single Random, Double Random & Required Length
End : Plain End, Beveled End, Treaded
End Protection : Plastic Caps
Outside Finish :2B, No.4, No.1, No.8 Mirror Finish for Stainless Steel Tubes, Finish as per customer Requirements
Delivery Condition : Annealed and Pickled, Polished, Bright Annealed, Cold Drawn
Inspection, Test Reports :Mill Test Certificates, EN 10204 3.1, Chemical Reports, Mechanical Reports, PMI Test Reports, Visual Inspection Reports, Third Party Inspection Reports, NABL Approved Lab Reports, Destructive Test Report, Non Destructive Test Reports
Packing :Packed in Wooden Boxes, Plastic Bags, Steel Strips Bundled, or as per Customers Requests
Specials :Sizes and Specifications other than above can be manufactured on request
Chemical Composition of Stainless Steel 321 Seamless Tubes
| C | Mn | Si | P | S | Cr | Ni | N | |
|---|---|---|---|---|---|---|---|---|
| 321 | 0.07max | 2.0max | 0.75max | 0.045max | 0.03max | min: 18.0 max: 20.0 | min: 8.0 max: 10.5 | — |
Mechanical Properties Of Stainless Steel 321 Seamless Tubes
| Grade | Tensile Strength ksi (min) | Yield Strength 0.2% ksi (min) | Elongation % | Hardness (Brinell) MAX | Hardness (Rockwell B) MAX |
|---|---|---|---|---|---|
| 321 | 75 | 30 | 40 | 201 | 92 |
Physical Properties of Stainless Steel 321 Seamless Tubes
| SS 316 | ||||||
|---|---|---|---|---|---|---|
| Density lbm/in3 | Thermal Conductivity (BTU/h ft. °F) | Electrical Resistivity (in x 10-6) | Modulus of Elasticity (psi x 106 | Coefficient of Thermal Expansion (in/in)/ °F x 10-6 | Specific Heat (BTU/lb/ °F) | Melting Range (°F) |
| at 68°F: 0.285 | 9.4 at 212°F | 28.3 at 68°F | 28 | 9.4 at 32 – 212°F | 0.1200 at 68°F to 212°F | 2500 to 2590 |
Equivalent Grades Stainless Steel 321 Seamless Tubes
| STANDARD | WERKSTOFF NR. | UNS | JIS | EN |
|---|---|---|---|---|
| SS 321 | 1.4438 | S31703 | SUS 321 | X2CrNiMo18-15-4 |
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