347 Stainless Steel Coil
Stellanox Steel supplies high-performance 347 Stainless Steel Coils, engineered for superior resistance to intergranular corrosion and high-temperature service. Stabilized with niobium (columbium), 347 stainless steel offers excellent weldability, oxidation resistance, and creep strength—making it an ideal choice for applications in aerospace, petrochemical, power generation, and chemical processing industries.
These coils maintain structural integrity in extreme environments, especially during thermal cycling and post-weld exposure.
What is 347 Stainless Steel Coil?
347 Stainless Steel Coil is a titanium-free, niobium-stabilized austenitic stainless steel that resists chromium carbide precipitation during welding or long-term exposure to high temperatures. It is especially suited for continuous service in the temperature range of 427–900°C, where it performs better than unstabilized 304 or 316 stainless steels.
It is supplied in both hot-rolled and cold-rolled conditions, with customizable surface finishes to meet a wide range of fabrication and aesthetic requirements.
| 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
- Nb-Stabilized for Intergranular Corrosion Resistance: Excellent performance after welding or heating.
- High-Temperature Durability: Maintains strength and scale resistance up to 900°C.
- Creep & Oxidation Resistant: Suitable for pressure vessels and heat-based systems.
- Good Weldability: No post-weld heat treatment needed.
- Non-Magnetic in Annealed State: Ideal for critical industrial and instrumentation use.
- Available in Various Finishes: 2B, No.4, Mirror, HL, and custom textures available.
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 |