S31803 Duplex Stainless Steel Wire for Corrosion-Critical Applications | China Supplier
When picking stainless steel wire for tough working conditions, buyers care about more than just tensile strength. For offshore parts, chemical equipment and filter components, resistance to chloride corrosion and stress corrosion cracking (SCC) is what matters most.
Made with a near 50/50 mix of austenite and ferrite, S31803 duplex stainless steel wire is stronger than standard 304 and 316 grades. It also holds up much better against corrosion in environments with chloride.
Supply Range & Ordering Information
| Item | Details |
| Product | S31803 Duplex Stainless Steel Wire |
| UNS No. | S31803 |
| Standard | ASTM A276, ASTM A580, EN 10088 |
| Wire Diameter | 0.20–12.00 mm |
| Supply Condition | Annealed, Bright Drawn, Pickled |
| Surface Finish | Bright, Matte, Polished |
| Processing Service | Straightening, Cut-to-Length, Precision Drawing |
| Certificate | EN 10204 3.1 MTC |
| Delivery Terms | FOB, CFR, CIF, EXW |
| Property | Typical Value |
| Chromium (Cr) | 21.0–23.0% |
| Nickel (Ni) | 4.5–6.5% |
| Molybdenum (Mo) | 2.5–3.5% |
| Nitrogen (N) | 0.08–0.20% |
| Tensile Strength | ≥620 MPa |
| Yield Strength | ≥450 MPa |
| Elongation | ≥25% |
| PREN | ≥35 |
Why Is S31803 Wire Used in Harsh Environments?
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High Resistance to Chloride Attack
The addition of chromium, molybdenum and nitrogen gives S31803 excellent resistance to pitting and crevice corrosion, making it suitable for seawater and chloride-rich process environments.
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Higher Mechanical Strength
With a minimum yield strength of 450 MPa, S31803 provides nearly twice the strength of standard austenitic stainless steel, allowing designers to reduce material thickness without sacrificing structural integrity.
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Stable Performance After Fabrication
The alloy maintains good toughness after cold drawing and is suitable for wire mesh weaving, spring manufacturing, welding filler applications and precision industrial components.
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Consistent Wire Quality
Uniform diameter tolerance, smooth surface finish and controlled mechanical properties help improve production efficiency for downstream manufacturers.
Typical Applications
With superior anti-corrosion and mechanical properties, S31803 duplex wire suits harsh corrosive working conditions for the below applications:
- Stainless Steel Wire Mesh
- Marine Fasteners
- Offshore Equipment
- Chemical Processing Systems
- Desalination Plants
- Industrial Springs
- Filtration Components
FAQ
Q: Is S31803 suitable for marine environments?
A: Yes. It offers excellent resistance to chloride-induced corrosion and is widely used in offshore applications.
Q: Can you provide bright drawn wire?
A: Yes. Bright drawn, annealed and pickled finishes are all available.
Q: Is custom wire diameter available?
A: Yes. We support customized diameters, coil weights and cut lengths.
Q: What certificates are supplied?
A: EN 10204 3.1 Mill Test Certificate and PMI reports are available upon request.
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