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Stainless Steel 321 | Product Overview
Introduction To Austenitic Stainless Steel 321 UNS S32100 / 1.4541
MOKSH TUBES & FITTINGS LLP supplies a comprehensive range of Stainless Steel 321 products, including pipes, tubes, sheets, plates, bars, fittings, and flanges.
Austenitic Stainless Steel 317, is a titanium-stabilized austenitic stainless steel designed to resist intergranular corrosion after exposure to temperatures in the chromium carbide precipitation range of 427–816°C (800–1500°F).
Chemical Composition
| Element | Composition (%) |
|---|---|
| Carbon | ≤ 0.08 |
| Chromium | 17.0 – 19.0 |
| Nickel | 9.0 – 12.0 |
| Manganese | ≤ 2.0 |
| Titanium | 5 × C min – 0.70 max |
| Silicon | ≤ 0.75 |
| Phosphorus | ≤ 0.045 |
| Sulfur | ≤ 0.03 |
| Nitrogen | ≤ 0.10 |
Technical Composition
Physical Properties
| Property | Imperial | Metric |
|---|---|---|
| Density | 0.289 lb/in³ | 8.0 g/cm³ |
| Melting Point | 2550 – 2650 °F | 1399 – 1454 °C |
| Modulus of Elasticity | 28 × 10³ ksi | 193 GPa |
| Poisson’s Ratio | 0.27 | — |
Mechanical Properties
| Property | Annealed | Hot-Finished | Cold Drawn | Hot-rolled | Sheet |
|---|---|---|---|---|---|
| Tensile Strength (ksi / MPa) | 70–90 / 485–620 | 75–105 / 515–725 | 80–110 / 550–760 | 70–90 / 485–620 | 75–100 / 515–690 |
| Yield Strength (0.2%) (ksi / MPa) | 30–45 / 205–310 | 40–65 / 275–450 | 45–70 / 310–485 | 30–50 / 205–345 | 35–60 / 240–415 |
| Elongation (%) | 40–60 | 30–50 | 20–40 | 40–60 | 35–55 |
| Brinell Hardness (3000 kg) | 120–180 | 140–200 | 160–210 | 120–180 | 140–190 |
| Rockwell Hardness (B / C) | 80–95 B | 85–100 B | 90–105 B | 80–95 B | 85–95 B |
Products in Austenitic Stainless Steel 321
Austenitic Stainless Steel 321 is available in:
Austenitic Stainless Steel 321 products are produced to the following global standards:
Uses and Advantages
Titanium stabilized – prevents carbide precipitation and resists intergranular corrosion
Excellent oxidation resistance up to 900°C (1652°F)
Superior creep strength compared to 304 stainless steel
Good weldability and formability
Maintains mechanical properties in elevated temperature service
Applications of Austenitic Stainless Steel 321
Austenitic Stainless Steel 321 is used in environments requiring superior corrosion resistance and mechanical properties, including:
High Temperature Services
heat exchangers, refinery equipment, power plant components
Aerospace & Aviation
aircraft exhaust manifolds, jet engine components
Chemical & Petrochemical Industry
process piping, reactors, heaters
Food & Beverage Industry
processing equipment requiring corrosion resistance
Furnace Components
radiant tubes, kiln linings, and firebox sheets
Marine Industry
heat exchangers and structural components in seawater exposure
WHY CHOOSE US?
FAQ's
What is Austenitic Stainless Steel 321 and how does it differ from 304 stainless steel?
Austenitic Stainless Steel 321 is a titanium-stabilized grade of stainless steel designed to resist intergranular corrosion caused by carbide precipitation at elevated temperatures (427–816°C). Unlike SS 304, which can suffer from sensitization, SS 321 maintains stability and strength in high temperature applications, making it ideal for heat exchangers, furnace parts, and aerospace components.
What are the main properties of Stainless Steel 321?
Key properties of SS 321 include:
- Titanium stabilization for resistance against carbide precipitation.
- Excellent oxidation resistance up to 900°C (1652°F).
- Superior creep strength compared to 304 stainless steel.
- Good weldability and formability for fabrication.
- Retains mechanical properties even during long term high-temperature exposure.
Where is Stainless Steel 321 commonly used?
SS 321 is widely used in industries that require high strength and corrosion resistance at elevated temperatures, including:
- Aerospace & aviation (exhaust manifolds, jet engine parts).
- Power generation & refinery equipment (heat exchangers, boilers).
- Chemical & petrochemical industry (reactors, process piping).
- Food & beverage processing (acid-resistant equipment).
- Marine applications (heat exchangers, seawater exposed structures).
- Furnace components (radiant tubes, firebox sheets).
Why is Stainless Steel 321 preferred for high temperature applications?
SS 321 contains titanium, which prevents chromium carbide formation during welding and prolonged heating. This ensures resistance to intergranular corrosion, while maintaining mechanical strength and oxidation resistance up to 900°C. These features make it highly reliable for thermal equipment, power plants, aerospace, and furnace components.
Who is a trusted supplier of Stainless Steel 321 in India?
Moksh Tubes & Fittings LLP is a leading manufacturer, supplier, exporter, importer, and stockist of Stainless Steel 321 products, including pipes, tubes, sheets, plates, bars, fittings, and flanges. With ISO & PED certifications, strict quality control, custom fabrication, and a global export network, Moksh Tubes & Fittings LLP is a reliable partner for industries worldwide.
Contact Us
Moksh Tubes & Fittings LLP is your reliable supplier of Stainless Steel 321 products – contact us today for competitive pricing & technical support. Get in Touch