Steel Strip Profiles
309 Stainless Steel Strip
Designed for heat-intensive environments, 309 stainless steel strip provides superior resistance to oxidation and scaling at temperatures up to 1000°C. Its elevated chromium and nickel content ensures long-term durability in furnace parts, thermal shielding, exhaust systems, and other demanding applications. Ideal for industries requiring both strength and corrosion resistance under extreme thermal conditions.
Product Introduction
309 stainless steel strip is a heat-resistant austenitic alloy that offers excellent oxidation resistance and durability at elevated temperatures. With higher chromium (22–24%) and nickel (12–15%) content compared to 304, it delivers enhanced performance in thermal environments. This grade is ideal for use in industrial furnaces, high-temperature ductwork, kilns, and other heat-intensive systems where structural integrity and corrosion resistance are critical.
Product Specifications
- Grade: 309 / UNS S30900
- Thickness: 0.01mm – 3.0mm
- Width: 10mm – 600mm
- Finish: 2B, No.1, BA, HL
- Edge: Slit Edge / Mill Edge
- Standard: ASTM A240, EN 10095, JIS G4304
Key Features
- Exceptional oxidation resistance up to 1000°C (1832°F)
- High chromium and nickel content for thermal strength
- Non-magnetic in annealed condition
- Excellent weldability and corrosion resistance
- Ideal for high-temperature structural applications
Chemical Composition
| Element | Content (%) |
|---|---|
| Carbon (C) | ≤ 0.20 |
| Chromium (Cr) | 22.0 – 24.0 |
| Nickel (Ni) | 12.0 – 15.0 |
| Manganese (Mn) | ≤ 2.0 |
| Silicon (Si) | ≤ 1.0 |
| Phosphorus (P) | ≤ 0.045 |
| Sulfur (S) | ≤ 0.03 |
Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | ≥ 550 MPa |
| Yield Strength | ≥ 205 MPa |
| Elongation | ≥ 40% |
| Hardness | ≤ 95 HRB |
Equivalent Grades
| Standard | Equivalent |
|---|---|
| UNS | S30900 |
| EN | 1.4828 |
| JIS | SUS 309S |
Applications
- Furnace liners and burner components
- Heat exchangers and thermal reactors
- Boiler parts and incinerator linings
- High-temperature ducts and exhaust systems
- Industrial oven and kiln supports
FAQ – Frequently Asked Questions
- Q: What makes 309 better than 304 for heat applications?
A: 309 has higher chromium and nickel content, enhancing resistance to scaling and thermal fatigue. - Q: Is 309 stainless steel magnetic?
A: No, it remains non-magnetic in annealed condition. - Q: Can you provide cut-to-size strips?
A: Yes, we offer custom slitting and cutting services based on your requirements. - Q: What finishes are available for 309 strip?
A: Common finishes include 2B, No.1 (mill finish), BA, and HL.
