347 Stainless Steel Wire
High-performance 347 stainless steel wire from Stellanox Steel is perfect for welded and high-temperature applications where resistance to intergranular corrosion is essential. This niobium-stabilized stainless wire is a popular option for heat exchanger, exhaust system, petrochemical, and aerospace components due to its exceptional thermal stability, creep resistance, and weldability.
Under mechanical and thermal stress, 347 wire maintains its strength and resistance to corrosion, making it a dependable option for long-term operation in challenging settings.
What is 347 Stainless Steel Wire?
Tantalum and columbium (niobium) are added to austenitic stainless steel to create 347 Stainless Steel Wire. After welding, this stabilisation helps maintain corrosion resistance in the heat-affected zone by preventing the production of chromium carbides. In high-temperature service, it performs better than 304 and maintains its structural integrity up to 870–900°C.
Applications needing resistance to oxidation, creep, and sensitisation employ 347 stainless wire, which comes in annealed and spring-tempered varieties.
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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
- After welding, niobium stabilises, preventing intergranular corrosion.
- Fantastic High-Temperature Strength: Able to withstand extended exposure to temperatures between 870°C and 900°C.
- Better Oxidation Resistance: Fit for environments with cyclic heat.
- Weldable Heat treatment after welding is not necessary.
- Non-Magnetic (Annealed): Unless cold handled, retains its austenitic qualities.
- Creep-resistant: Preserves mechanical strength in the face of extreme heat and stress.
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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