SS 321 Stainless Steel Wire
Precision Alloys is a trusted manufacturer and global supplier of SS 321 stainless steel wire, offering high-temperature, weld-stabilized wire solutions for thermal processing, aerospace, chemical, and exhaust system applications. Manufactured to meet ASTM A580, ASME SA580, and EN 10088 standards, our SS 321 wires are available in various tempers, finishes, and diameters for demanding industrial needs.
What is SS 321 Stainless Steel Wire?
SS 321 stainless steel wire is a titanium-stabilized austenitic stainless steel that resists intergranular corrosion and weld decay better than standard SS 304. With excellent high-temperature strength, oxidation resistance, and weldability, SS 321 is ideal for wire forms, supports, and components that face thermal cycling and continuous heating up to 870–900°C.
Available in soft, half-hard, and spring-hard conditions, this wire is supplied in coils, spools, or cut lengths.
SS 321 Stainless Steel Wire Specifications
| Property | Specification |
|---|---|
| Material Grade | SS 321 |
| UNS Number | S32100 |
| EN / WNR | 1.4541 / X6CrNiTi18-10 |
| Diameter Range | 0.10 mm – 10 mm |
| Tempers | Soft Annealed, Half-Hard, Spring-Hard |
| Forms | Coil, Spool, Straight Cut Lengths |
| Surface Finishes | Bright, Pickled, Matte, Polished |
| Standards | ASTM A580, ASME SA580, EN 10088, DIN 1.4541 |
Chemical Composition – SS 321 Wire
| Element | % Composition |
|---|---|
| Carbon (C) | 0.08 max |
| Manganese (Mn) | 2.00 max |
| Silicon (Si) | 1.00 max |
| Chromium (Cr) | 17.0 – 19.0 |
| Nickel (Ni) | 9.0 – 12.0 |
| Titanium (Ti) | ≥ 5x C (%) |
| Phosphorus (P) | 0.045 max |
| Sulfur (S) | 0.030 max |
Mechanical Properties – SS 321 Stainless Steel Wire
| Property | Value |
|---|---|
| Tensile Strength | 500 – 750 MPa (annealed to hard) |
| Yield Strength | 200 – 300 MPa |
| Elongation | 40% min |
| Hardness | ≤ 90 HRB |
| Service Temperature | Up to 870–900°C (continuous exposure) |
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