Cold-Rolled 309S Stainless Steel Sheet – High-Temperature Corrosion Resistance for Industrial Applications
Cold-Rolled 309S Stainless Steel Sheet – High-Temperature Corrosion Resistance for Industrial Applications
Stainless Steel Sheet Specifications
| Name | 309S stainless steel sheet |
| Our Grade |
200 Series: 201 202 300 Series: 301 304,304L,304H,309S,310S,314,316L,316Ti,316H,316LN,317L,321,329,347 400 Series: 409L,410,410S,416,420,430,431,436L.439,441,443,444,445,446 Super Stainless Steel: 904L,926,254SMO,654SMO,15-5PH,17-4PH,17-7PH.etc Nickel Alloy: C276, C22,G35,Alloy X,Monel 400,K500,Inconel 600,601,617,625,718,Incoloy 800,800H,800HT,825.etc |
| Technique | Hot Rolled, Cold Rolled,Forged |
| Standard | JIS, AISI, ASTM, DIN, TUV, BV, SUS, etc |
| Thickness | 0.1 – 80.0mm |
| Width range | 10mm – 2000mm |
| Length | Customized |
| Finish | 2B, BA, No.4, 8k, Brushed,Hairline,PVD Coating,Sandblasted |
| Service | Laser Cutting, Bending |
| Sample | Available |
Cold-Rolled 309S Stainless Steel Sheet – High-Temperature Corrosion Resistance for Industrial Applications
Overview
Cold-rolled 309S stainless steel sheet is a high-alloy austenitic stainless steel specifically engineered for excellent performance in elevated-temperature environments. Its enhanced chromium (22–24%) and nickel (12–15%) content, combined with low carbon levels (≤0.08%), provide superior oxidation resistance, creep strength, and resistance to sulfidation and carburization—making it ideal for demanding industrial applications.
Key Features
- High-Temperature Stability: Retains mechanical integrity up to 1,000°C (1,832°F); continuous service temperature typically up to 980°C.
- Excellent Oxidation Resistance: Forms a stable, protective chromium oxide layer at high temperatures.
- Low Carbon Content (“S” Grade): Minimizes carbide precipitation during welding or high-temp exposure, improving weldability and intergranular corrosion resistance.
- Good Fabricability: Cold rolling improves surface finish, dimensional accuracy, and mechanical strength compared to hot-rolled counterparts.
- Corrosion Resistance: Resists scaling and maintains structural integrity in aggressive atmospheres (e.g., combustion gases, thermal cycling).
Typical Applications
- Heat Treatment Equipment: Furnace parts, radiant tubes, muffles
- Chemical Processing: Reactors, retorts, and piping exposed to high-temp corrosive media
- Power Generation: Boiler baffles, exhaust systems, flue gas components
- Aerospace & Automotive: Exhaust manifolds, catalytic converter housings
- Waste Incineration: Combustion chambers and ducting
Mechanical & Physical Properties (Typical)
| Property | Value (Approx.) |
|---|---|
| Tensile Strength | 515–700 MPa |
| Yield Strength (0.2% offset) | 205–310 MPa |
| Elongation | ≥40% |
| Density | 7.9 g/cm³ |
| Melting Range | 1,400–1,450°C |
| Thermal Conductivity | ~13 W/m·K (at 100°C) |
| Electrical Resistivity | ~0.78 µΩ·m |
Standards & Specifications
- ASTM A240/A240M: Standard specification for chromium-nickel stainless steel plate, sheet, and strip
- UNS S30908: Unified Numbering System designation
- EN 1.4833 / X12CrNi23-13: European equivalent
- JIS SUS309S: Japanese Industrial Standard
Advantages Over Other Grades
- vs. 304/316: Higher Cr/Ni content offers far better high-temp performance.
- vs. 309: Lower carbon in 309S reduces sensitization risk during welding.
- vs. 310S: Slightly lower cost while still delivering robust performance up to ~980°C.
Considerations for Use
- Not recommended for cryogenic applications due to reduced toughness at very low temperatures.
- Machining requires appropriate tools and coolants due to work-hardening tendency.
- Post-weld annealing is generally not required but may be used for severe service conditions.
Conclusion
Cold-rolled 309S stainless steel sheet is a reliable choice for components operating in high-temperature, oxidizing, or mildly corrosive environments. Its combination of formability, weldability, and thermal stability ensures long service life and operational safety across heavy industries.
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.