347 Stainless Steel Coil
High-performance 347 stainless steel coils from Stellanox Steel are designed to withstand intergranular corrosion and high temperatures. 347 stainless steel, stabilised with niobium (columbium), is a great option for applications in the petrochemical, chemical processing, power generation, and aerospace industries because of its exceptional weldability, oxidation resistance, and creep strength.
In harsh conditions, including as temperature cycling and post-weld exposure, these coils retain their structural integrity.
What is 347 Stainless Steel Coil?
During welding or prolonged exposure to high temperatures, 347 Stainless Steel Coil, an austenitic stainless steel stabilised by niobium and free of titanium, can withstand the precipitation of chromium carbide. In the temperature range of 427 to 900°C, it excels at continuous service and outperforms unstabilized 304 or 316 stainless steels.
Both hot-rolled and cold-rolled forms are available, and its surface treatments can be altered to satisfy a variety of manufacturing and design needs.
| Products |
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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 Coil
- For Intergranular Corrosion, Nb-Stabilized Resistance: Outstanding results following heating or welding.
- High-Temperature Durability: Up to 900°C, it retains its strength and resistance to scaling.
- Resistant to creep and oxidation: Ideal for heat-based systems and pressure tanks.
- Good Weldability: No heat treatment after welding is required.
- When annealed, this non-magnetic material is perfect for essential industrial and instrumentation applications.
- Available in Mirror, HL, No. 4, 2B, and custom textures, among other finishes.
Specification Chart – 347 Stainless Steel Coil
| Property | Details |
|---|---|
| Grade | 347 (UNS S34700) |
| Standards | ASTM A240 / A480, EN 10088-2, JIS G4305 |
| Thickness Range | 0.3 mm – 6 mm |
| Width Range | 10 mm – 2000 mm |
| Coil ID / OD | 508 mm ID, OD as per requirement |
| Surface Finishes | 2B, BA, No.4, No.8 (Mirror), HL |
| Processing Options | Slitting, Cut-to-Length, PVC Coating, Polishing |
| Edge Condition | Mill Edge, Slit Edge |
Chemical Composition – 347 Stainless Steel Coil
| Element | Composition (%) |
|---|---|
| Chromium (Cr) | 17.0 – 19.0 |
| Nickel (Ni) | 9.0 – 13.0 |
| Carbon (C) | ≤ 0.08 |
| Manganese (Mn) | ≤ 2.0 |
| Silicon (Si) | ≤ 0.75 |
| Phosphorus (P) | ≤ 0.045 |
| Sulfur (S) | ≤ 0.030 |
| Niobium (Nb) + Ta | ≥ 10 x C (min) to ≤ 1.10 |
| Iron (Fe) | Balance |
Mechanical Properties – 347 Stainless Steel Coil
| Property | Value |
|---|---|
| Tensile Strength (MPa) | ≥ 515 |
| Yield Strength (MPa) | ≥ 205 |
| Elongation (%) | ≥ 40 |
| Hardness (HRB) | ≤ 95 |
| Modulus of Elasticity | 193 GPa |
| Density | 7.90 g/cm³ |
Equivalent Grades
| Standard | Grade |
|---|---|
| ASTM | 347 |
| EN | 1.4550 |
| JIS | SUS 347 |
| UNS | S34700 |
| DIN | X6CrNiNb18-10 |
347 Stainless Steel Coil Weight Chart
| Thickness (mm) | Weight per m² (kg) |
|---|---|
| 0.3 | 2.37 |
| 0.5 | 3.95 |
| 0.8 | 6.32 |
| 1.0 | 7.90 |
| 1.5 | 11.85 |
| 2.0 | 15.80 |
| 3.0 | 23.70 |
| 4.0 | 31.60 |
| 5.0 | 39.50 |
| 6.0 | 47.40 |
Applications of 347 Stainless Steel Coil
- Heat exchanger and pressure vessel linings
- Chemical processing and refinery components
- Exhaust manifolds and piping systems
- Food and beverage steam piping
- Expansion joints and thermal oxidizers
- Furnace liners and high-temp ductwork
- Power generation superheater tubes
Benefits of 347 Stainless Steel Coil
- Superior high-temperature creep strength
- No post-weld annealing required
- Long service life in thermal cycling applications
- Excellent corrosion and scaling resistance
- Suitable for welded structures exposed to heat
- Hygienic and easy to clean surface finish
2025 Stellanox Steel |