347 Stainless Steel Wire
Stellanox Steel supplies high-performance 347 Stainless Steel Wire, ideal for high-temperature and welded applications where intergranular corrosion resistance is critical. This niobium-stabilized stainless wire offers excellent thermal stability, creep resistance, and weldability—making it a preferred choice in aerospace, petrochemical, heat exchanger, and exhaust system components.
347 wire provides a reliable solution for long-term service in demanding environments, maintaining strength and corrosion resistance under mechanical and thermal stress.
What is 347 Stainless Steel Wire?
347 Stainless Steel Wire is an austenitic stainless steel alloy with added columbium (niobium) and tantalum. This stabilization prevents the formation of chromium carbides, which helps preserve corrosion resistance in the heat-affected zone after welding. It offers superior performance over 304 in high-temperature service and remains structurally sound up to 870–900°C.
Available in multiple conditions including annealed and spring temper, 347 stainless wire is used in applications requiring resistance to sensitization, creep, and oxidation.
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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 347 Stainless Steel Wire
- Niobium Stabilized: Protects against intergranular corrosion post-welding.
- Excellent High-Temperature Strength: Withstands long-term exposure up to 870–900°C.
- Superior Oxidation Resistance: Suitable for cyclic thermal environments.
- Weldable: No post-weld heat treatment required.
- Non-Magnetic (Annealed): Retains austenitic properties unless cold worked.
- Creep-Resistant: Maintains mechanical strength under high stress and heat.
Specification Chart – 347 Stainless Steel Wire
| Property | Details |
|---|---|
| Grade | 347 (UNS S34700) |
| Standards | ASTM A580, ASTM A313, EN 10088-2 |
| Wire Diameter Range | 0.05 mm – 10 mm |
| Surface Finish | Bright, Matte, Soap Coated, Pickled |
| Forms Available | Coil, Spool, Cut Lengths |
| Conditions | Annealed, 1/4 Hard, Spring Hard |
Chemical Composition – 347 Stainless Steel Wire
| Element | Composition (%) |
|---|---|
| Chromium (Cr) | 17.0 – 19.0 |
| Nickel (Ni) | 9.0 – 13.0 |
| Niobium (Nb) + Tantalum | ≥ 10xC – ≤ 1.0 |
| 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 – 347 Stainless Steel Wire
| Property | Value |
|---|---|
| Tensile Strength (MPa) | 500 – 750 |
| Yield Strength (MPa) | ≥ 205 |
| Elongation (%) | ≥ 40 |
| Hardness (HRB) | ≤ 95 |
| Density | 7.93 g/cm³ |
Equivalent Grades
| Standard | Grade |
|---|---|
| ASTM | 347 |
| EN | 1.4550 |
| JIS | SUS 347 |
| UNS | S34700 |
| DIN | X6CrNiNb18-10 |
347 Stainless Steel Wire Weight Chart
| Wire Diameter (mm) | Weight per 100 meters (kg) |
|---|---|
| 0.5 | 0.16 |
| 1.0 | 0.63 |
| 2.0 | 2.52 |
| 3.0 | 5.66 |
| 4.0 | 10.04 |
| 5.0 | 15.70 |
Applications of 347 Stainless Steel Wire
- High-Temperature Exhaust Components
- Pressure Vessels and Boiler Parts
- Chemical Processing and Refining Systems
- Heat Exchangers and Thermal Shields
- Aerospace and Jet Engine Parts
- Expansion Bellows and Welded Tubes
Benefits of 347 Stainless Steel Wire
- Excellent resistance to intergranular corrosion post-welding
- Ideal for long-term high-temperature service
- Maintains strength under thermal and mechanical stress
- Easily weldable without loss of corrosion resistance
- Stable performance in cyclic heating and cooling
- Non-magnetic and austenitic in nature
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