321 Stainless Steel Wire
Stellanox Steel provides top-quality 321 Stainless Steel Wire, engineered for demanding high-temperature applications and frequent welding operations. Stabilized with titanium, 321 wire offers exceptional resistance to intergranular corrosion and maintains mechanical strength at elevated temperatures, making it ideal for aerospace, exhaust systems, heat exchangers, and thermal insulation supports.
321 stainless steel wire combines the corrosion resistance of 304 with added thermal stability—perfect for environments where consistent heat exposure is expected.
What is 321 Stainless Steel Wire?
321 Stainless Steel Wire is an austenitic chromium-nickel stainless steel alloy stabilized with titanium. The addition of titanium prevents chromium carbide formation during welding and high-temperature service, enhancing the material’s resistance to intergranular corrosion.
321 wire is typically supplied in annealed or spring temper conditions and is suitable for applications involving sustained temperatures up to 900°C, without degradation of structural properties.
| Products |
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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 Wire
- Titanium Stabilized: Prevents sensitization and ensures post-weld corrosion resistance.
- High-Temperature Strength: Withstands continuous service up to 870–900°C.
- Excellent Oxidation Resistance: Performs reliably in hot and scaling environments.
- Non-Magnetic (Annealed): Retains austenitic non-magnetic structure unless cold worked.
- Good Ductility: Suitable for forming, coiling, and bending.
- Stable Performance: Reliable under thermal stress and pressure cycling.
Specification Chart – 321 Stainless Steel Wire
| Property | Details |
|---|---|
| Grade | 321 (UNS S32100) |
| Standards | ASTM A580, ASTM A313, EN 10088-2 |
| Wire Diameter Range | 0.05 mm – 10 mm |
| Surface Finish | Bright, Matte, Pickled, Soap Coated |
| Forms Available | Coil, Spool, Cut Lengths |
| Conditions | Annealed, Spring Hard, Full Hard |
Chemical Composition – 321 Stainless Steel Wire
| Element | Composition (%) |
|---|---|
| Chromium (Cr) | 17.0 – 19.0 |
| Nickel (Ni) | 9.0 – 12.0 |
| Titanium (Ti) | ≥ 5xC – ≤ 0.70 |
| Carbon (C) | ≤ 0.08 |
| Manganese (Mn) | ≤ 2.00 |
| Silicon (Si) | ≤ 1.00 |
| Phosphorus (P) | ≤ 0.045 |
| Sulfur (S) | ≤ 0.030 |
| Iron (Fe) | Balance |
Mechanical Properties – 321 Stainless Steel Wire (Annealed)
| Property | Value |
|---|---|
| Tensile Strength (MPa) | 500 – 750 |
| Yield Strength (MPa) | ≥ 205 |
| Elongation (%) | ≥ 40 |
| Hardness (HRB) | ≤ 95 (Annealed) |
| Density | 7.92 g/cm³ |
Equivalent Grades
| Standard | Grade |
|---|---|
| ASTM | 321 |
| EN | 1.4541 |
| JIS | SUS 321 |
| UNS | S32100 |
| DIN | X6CrNiTi18-10 |
321 Stainless Steel Wire Weight Chart
| Wire Diameter (mm) | Weight per 100 meters (kg) |
|---|---|
| 0.5 | 0.16 |
| 1.0 | 0.63 |
| 2.0 | 2.51 |
| 3.0 | 5.65 |
| 4.0 | 10.01 |
| 5.0 | 15.66 |
Applications of 321 Stainless Steel Wire
- Aircraft Engine Components
- Expansion Joints and Bellows
- Automotive Exhaust Systems
- Heat Exchangers and Furnace Fixtures
- Thermal Insulation Supports
- Aerospace Fasteners and Springs
Benefits of 321 Stainless Steel Wire
- Superior thermal stability at elevated temperatures
- Prevents weld decay and intergranular corrosion
- High structural integrity under cyclic heat stress
- Suitable for continuous exposure in oxidizing environments
- Excellent forming and fabrication properties
- Non-magnetic and hygienic for industrial use
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