SS 321 contains approximately 17% to 19% chromium, 9% to 12% nickel, and titanium (Ti) that stabilizes against carbide precipitation during heating, satisfying Ti ≥ 5 × (C+N), with carbon limited to 0.08% and nitrogen to 0.10%. The tensile strength is around 515 MPa (about 75,000 psi), and the yield strength is approximately 205 MPa (about 30,000 psi), with an elongation of roughly 35% in the annealed condition. It can sustain service temperatures up to about 1450 °C and has high creep resistance. The SS 321H variant has a higher carbon content (up to 0.10%) for better strength at elevated temperatures. These qualities make it ideal for thermal stability and mechanical performance in extreme environments.
| Standard | ASTM A312, A358 / ASME SA312, SA358 |
| Outside Diameter | 6.00 mm OD up to 914.4 mm OD, Sizes up to 24″ NB available Ex-stock, OD Size Steel Tubes available Ex-stock |
| Thickness | 0.3mm – 50 mm, SCH 5, SCH10, SCH 40, SCH 80, SCH 80S, SCH 160, SCH XXS, SCH XS |
| Type | Seamless / ERW / Welded / Fabricated Pipes |
| Form | Round, Square, Rectangular, Oval, Hydraulic Etc |
| Length | Single Random, Double Random & Required Length |
| End | Plain End, Beveled End, Treaded |
| Outside Finish | 2B, No.4, No.1, No.8 Mirror Finish for Stainless Steel Pipes, Finish as per customer Requirements |
| Grade | C | N | Ni | Si | P | S | Mn | Cr | TI | |
|---|---|---|---|---|---|---|---|---|---|---|
| SS 321 | Min | – | – | 9.00 | – | – | – | – | 17.0 | 5(C+N) |
| max | 0.08 | 0.10 | 12.00 | 1.00 | 0.045 | 0.030 | 2.00 | 19.0 | 0.70 max |
| Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
| 8.0 g/cm3 | 1457 °C (2650 °F) | Psi – 75000 , MPa – 515 | Psi – 30000 , MPa – 205 | 35 % |
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At Harshita Stainless, we are proud to be the largest supplier, manufacturer, and exporter of Stainless Steel 321 Pipes in Dubai, India. Our cutting-edge solutions cater to all your piping needs. With state-of-the-art production facilities strategically located in the India, we maintain a vast inventory of over 16,000 tons of premium-quality materials, ensuring we have the stock readily available to meet your demands.
Corrosion resistant to high-temperature oxidation. Available in various sizes, typically from 1″ to 6″, with wall thicknesses ranging from 1.5mm to 5mm. It is ideal for structural and architectural applications requiring a polished, aesthetic appearance.
Highly resistant to intergranular corrosion and oxidation. Sizes range from 1/8″ to 24″ in diameter, with wall thicknesses from 1mm to 12mm. Suitable for high-temperature service and applications requiring high pressure.
Excellent resistance to oxidation and corrosion. Commonly produced in sizes from 1″ to 24″ in diameter, with wall thicknesses from 2mm to 10mm and used in construction and pipelines for moderate pressure and temperature conditions.
Corrosion resistant with enhanced strength for large diameter applications. Typically available in sizes from 12″ to 60″ diameter with wall thicknesses up to 20mm. It is ideal for high-pressure and high-temperature applications in the oil and gas industry.
Offers superior resistance to high-temperature oxidation and corrosion. Standard sizes range from 1/8″ to 12″ in diameter, with wall thicknesses from 1mm to 10mm. They are commonly used in various industrial and structural applications.
Corrosion resistance with good high-temperature stability. Available in sizes from 1″ to 24″ in diameter, with wall thicknesses ranging from 1.5mm to 12mm. Suitable for a variety of applications, including chemical and petrochemical industries.
Harshita Stainless is a leading supplier, and stockist of high-quality Stainless Steel 317 Pipes in Dubai, India. Our products are widely used in various applications, and we are committed to delivering excellent service, resulting in high customer satisfaction. Our unique finishing techniques further distinguish us in the stainless steel industry. We are dedicated to consistently providing superior products and effectively meeting our customer’s needs.
SS 321 and 321H pipe grades are extensively used in high-temperature systems, including heat exchangers, furnace components, petrochemical process lines, reactor coils, and exhaust stacks. Their resistance to chromium carbide precipitation ensures stability in cyclic thermal service. Industries such as petrochemical, chemical, power generation, aircraft exhaust systems, and food processing utilize these pipes to guarantee longevity in oxidation-prone conditions. Seamless variants provide high-pressure strength, while welded types are more cost-efficient and suited for larger diameters. Global suppliers in Dubai and India offer export-ready options for critical infrastructure applications.
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