321 Stainless Steel Sheet
Stellanox Steel offers top-grade 321 Stainless Steel Sheets designed for high-temperature service and superior corrosion resistance. Known for its excellent intergranular corrosion resistance after welding, 321 stainless steel is ideal for heat exchangers, furnace parts, thermal oxidizers, and applications involving continuous exposure to elevated temperatures.
As a titanium-stabilized austenitic stainless steel, 321 offers improved weldability and structural integrity compared to unstabilized 304 grade.
What is 321 Stainless Steel Sheet?
321 Stainless Steel Sheet is a flat-rolled stainless steel product alloyed with titanium to prevent carbide precipitation during welding or continuous high-temperature exposure. It maintains the strength and corrosion resistance of 304 stainless but excels in resisting intergranular corrosion and thermal stress.
321 sheets are commonly used in high-temperature environments (up to 900°C) and for components requiring frequent heating and cooling cycles.
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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 Sheet
- Stabilized with titanium to resist sensitization
- Excellent resistance to intergranular corrosion after welding
- Withstands prolonged high-temperature exposure
- Non-magnetic in the annealed condition
- Excellent creep strength and oxidation resistance
- Good weldability and fabricability
- Retains strength during thermal cycling
Specification Chart – 321 Stainless Steel Sheet
| Property | Details |
|---|---|
| Standard | ASTM A240 / ASME SA240 |
| Grade | 321 (UNS S32100) |
| Thickness Range | 0.5 mm to 50 mm |
| Width Range | Up to 2000 mm |
| Length | 2000 mm to 6000 mm (custom available) |
| Surface Finishes | 2B, BA, No.4, No.8 (Mirror), Matte |
| Processing Types | Cold Rolled, Hot Rolled |
| Surface Protection | PVC-coated / Paper Interleaf |
Chemical Composition – 321 Stainless Steel Sheet
| Element | Symbol | Composition (%) |
|---|---|---|
| Chromium | Cr | 17.0 – 19.0 |
| Nickel | Ni | 9.0 – 12.0 |
| Carbon | C | ≤ 0.08 |
| Manganese | Mn | ≤ 2.00 |
| Silicon | Si | ≤ 0.75 |
| Phosphorus | P | ≤ 0.045 |
| Sulfur | S | ≤ 0.030 |
| Titanium | Ti | ≥ 5 × (C + N) to 0.70 |
| Iron | Fe | Balance |
Mechanical Properties – 321 Stainless Steel Sheet
| Property | Value |
|---|---|
| Tensile Strength | ≥ 515 MPa |
| Yield Strength (0.2%) | ≥ 205 MPa |
| Elongation (50 mm) | ≥ 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 Sheet Weight Chart
| Thickness (mm) | Weight per m² (kg) | Weight per 4' x 8' Sheet (kg) |
|---|---|---|
| 0.5 | 3.95 | 9.64 |
| 1.0 | 7.90 | 19.28 |
| 1.5 | 11.85 | 28.92 |
| 2.0 | 15.80 | 38.56 |
| 3.0 | 23.70 | 57.84 |
| 5.0 | 39.50 | 96.40 |
| 6.0 | 47.40 | 115.68 |
Applications of 321 Stainless Steel Sheet
- Exhaust manifolds and mufflers
- Heat exchangers and boiler components
- Aerospace engine parts
- Thermal oxidizers and incinerator parts
- Chemical processing equipment
- Food and beverage equipment exposed to heat
- High-temperature pressure vessels
Benefits of 321 Stainless Steel Sheet
- Resists carbide precipitation during welding
- Withstands thermal cycling and high-temperature oxidation
- Excellent performance in elevated temperature environments
- Good mechanical properties under stress
- Suitable for both structural and high-pressure uses
- Easy to fabricate and maintain
2025 Stellanox Steel |