347 Stainless Steel Strip
High-performance 347 stainless steel strips from Stellanox Steel are perfect for applications involving welding, corrosive conditions, and frequent temperature changes. Niobium (columbium) stabilises 347 stainless steel strips, which provide exceptional strength and formability even at high temperatures and exceptional resistance to intergranular corrosion.
These strips are extensively utilised in thermal cycling, chemical processing, and aerospace systems where durability at high temperatures and dependability are essential.
What is 347 Stainless Steel Strip?
347 Stainless Steel Strip is an austenitic stainless steel alloy containing chromium, nickel, and niobium (columbium). The addition of niobium stabilizes the alloy against chromium carbide precipitation, making it highly resistant to intergranular corrosion even after welding or long-term exposure to high temperatures.
It retains mechanical strength and oxidation resistance up to 900°C, making it ideal for high-temperature, welded, or pressure-bearing applications.
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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 Strip
- Niobium Stabilised: Stops intergranular corrosion and carbide precipitation.
- Excellent Weldability: No heat treatment after welding is necessary.
- High-Temperature Strength: Able to withstand stress-rupturing and creep situations.
- Proper Oxidation Resistance: Adequate for usage in cycles with high temperatures.
Maintains strength even after being exposed to heat thanks to its stable mechanical properties. - Austenitic Non-Magnetic: When annealed, it often stays non-magnetic.
Specification Chart – 347 Stainless Steel Strip
| Property | Details |
|---|---|
| Grade | 347 (UNS S34700) |
| Standards | ASTM A240, ASTM A666, EN 10088-2 |
| Thickness Range | 0.1 mm – 3.0 mm |
| Width Range | 5 mm – 600 mm |
| Coil ID / OD | 200 mm / 400–800 mm (customizable) |
| Surface Finishes | 2B, BA, No. 4 |
| Edge Condition | Slit Edge, Rounded, Deburred |
| Processing Options | Slitting, Skin Pass, Cut-to-Length |
Chemical Composition – 347 Stainless Steel Strip
| 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 Strip
| Property | Value |
|---|---|
| Tensile Strength (MPa) | ≥ 515 |
| Yield Strength (MPa) | ≥ 205 |
| Elongation (%) | ≥ 40 |
| Hardness (HRB) | ≤ 95 (Annealed) |
| 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 Strip Weight Chart
| Thickness (mm) | Weight per m² (kg) |
|---|---|
| 0.2 | 1.59 |
| 0.5 | 3.98 |
| 0.8 | 6.37 |
| 1.0 | 7.96 |
| 1.5 | 11.94 |
| 2.0 | 15.92 |
| 3.0 | 23.88 |
Applications of 347 Stainless Steel Strip
- Heat Exchangers and Boilers
- Pressure Vessels and Expansion Bellows
- Aerospace Exhaust Systems
- High-Temperature Piping and Manifolds
- Chemical and Petrochemical Processing
- Furnace Components and Kiln Parts
Benefits of 347 Stainless Steel Strip
- Superior resistance to intergranular corrosion after welding
- Maintains strength at high temperatures
- No risk of sensitization in the heat-affected zone
- Reliable for cyclic thermal exposure
- Ideal for critical industrial, chemical, and thermal applications
- Compatible with all standard forming and welding processes
2025 Stellanox Steel |