321 Stainless Steel Coil
Stellanox Steel offers high-grade 321 Stainless Steel Coils that are stabilized with titanium to deliver excellent resistance to intergranular corrosion, especially in high-temperature and post-weld environments. These coils are ideal for use in heat exchangers, expansion joints, aerospace components, exhaust systems, and chemical process equipment where thermal cycling and corrosion resistance are critical.
321 stainless steel is particularly effective in applications that require resistance to oxidation and stress at elevated temperatures up to 870°C.
What is 321 Stainless Steel Coil?
321 Stainless Steel Coil is an austenitic stainless steel containing titanium (Ti) to stabilize the alloy against chromium carbide formation. This enhancement makes 321 especially resistant to sensitization, which typically occurs during welding or long-term exposure to temperatures between 427°C to 870°C.
Unlike 304, 321 can be used in prolonged high-temperature service without compromising structural integrity or corrosion resistance.
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Stainless Steel |
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Carbon Steel |
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Duplex Stainless Steel |
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Super Duplex Stainless Steel |
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Alloy Steel |
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Titanium |
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Hastelloy |
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Inconel |
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Monel |
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Aluminium |
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Copper |
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Pure Nickel |
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Flanges |
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Forged Fittings |
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Valves |
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Fasteners |
Key Features of 321 Stainless Steel Coil
- Titanium Stabilized: Protects against intergranular corrosion during welding and heating.
- High-Temperature Strength: Maintains stability up to 870°C (continuous) and 925°C (intermittent).
- Superior Weldability: Suitable for pressure vessels, heaters, and high-heat weld assemblies.
- Excellent Oxidation Resistance: Withstands air, moisture, and oxidizing environments.
- Non-Magnetic in Annealed Condition: Ideal for instrumentation and non-magnetic requirements.
- Available in Multiple Finishes: Offered in 2B, BA, No.4, mirror, and custom finishes.
Specification Chart – 321 Stainless Steel Coil
| Property | Details |
|---|---|
| Grade | 321 (UNS S32100) |
| Standards | ASTM A240 / A480, EN 10088-2, JIS G4305 |
| Width Range | 10 mm – 2000 mm |
| Thickness Range | 0.3 mm – 6 mm |
| Coil ID / OD | 508 mm ID, OD as per requirement |
| Surface Finishes | 2B, BA, No.4, HL, No.8 (Mirror), Matte |
| Processing Options | Slitting, Cut-to-Length, Polishing, PVC Coating |
| Edge Conditions | Mill Edge, Slit Edge |
Chemical Composition – 321 Stainless Steel Coil
| Element | Composition (%) |
|---|---|
| Chromium | 17.0 – 19.0 |
| Nickel | 9.0 – 12.0 |
| Carbon | ≤ 0.08 |
| Manganese | ≤ 2.0 |
| Silicon | ≤ 0.75 |
| Phosphorus | ≤ 0.045 |
| Sulfur | ≤ 0.030 |
| Titanium | ≥ 5xC min to 0.70 |
| Iron | Balance |
Mechanical Properties – 321 Stainless Steel Coil
| Property | Value |
|---|---|
| Tensile Strength (MPa) | ≥ 515 |
| Yield Strength (MPa) | ≥ 205 |
| Elongation (%) | ≥ 40 |
| Hardness (HRB) | ≤ 95 |
| Modulus of Elasticity | 193 GPa |
| Density | 7.90 g/cm³ |
Equivalent Grades
| Standard | Grade |
|---|---|
| ASTM | 321 |
| EN | 1.4541 |
| JIS | SUS 321 |
| UNS | S32100 |
| DIN | X6CrNiTi18-10 |
321 Stainless Steel Coil Weight Chart
| Thickness (mm) | Weight per m² (kg) |
|---|---|
| 0.3 | 2.37 |
| 0.5 | 3.95 |
| 0.8 | 6.32 |
| 1.0 | 7.90 |
| 1.5 | 11.85 |
| 2.0 | 15.80 |
| 3.0 | 23.70 |
| 4.0 | 31.60 |
| 5.0 | 39.50 |
| 6.0 | 47.40 |
Applications of 321 Stainless Steel Coil
- Exhaust manifolds and aircraft engine components
- Heat exchangers and superheaters
- Expansion joints and bellows
- Thermal oxidizers and flare stacks
- Piping systems in refineries and chemical plants
- Food-grade steam lines and sanitary equipment
- Industrial furnace liners and insulation cladding
Benefits of 321 Stainless Steel Coil
- Performs exceptionally in high-heat environments
- Weld-stable with no risk of sensitization
- Long service life with minimal degradation
- Excellent structural reliability under thermal cycling
- Resistant to scaling and oxidation
- Suitable for pressurized and structural use
2025 Stellanox Steel |