Steel Strip Profiles
409 Stainless Steel Strip
409 stainless steel strip is engineered for high-temperature strength and corrosion resistance. It performs reliably in welded, heat-exposed structures due to titanium stabilization, making it ideal for aerospace, furnace, and petrochemical applications. This alloy ensures long-term service stability, structural integrity, and processing versatility in demanding industrial environments.
Product Overview
409 stainless steel strip is a ferritic alloy primarily used in automotive exhaust systems. It offers excellent oxidation resistance and corrosion resistance, particularly in high-temperature environments. Due to its superior heat resistance and cost-effectiveness, it is widely used in automotive, heat exchangers, and other industrial applications.
Product Specifications
- Grade: 409 / UNS S40900
- Thickness: 0.01mm – 5.0mm
- Width: 10mm – 700mm
- Surface Finish: 2B, BA, No.4, HL, Mirror
- Edge: Slit Edge / Mill Edge
- Standard: ASTM A240, EN 10088-2, JIS G4304
Key Features
- 🔥 Titanium-stabilized for high-temperature service
- 🛡️ Excellent resistance to oxidation and corrosion
- 🔧 Good weldability and formability
- 🌡️ Superior high-temperature performance
Chemical Composition
| Element | Content (%) |
|---|---|
| Carbon (C) | ≤ 0.030 |
| Manganese (Mn) | ≤ 1.0 |
| Phosphorus (P) | ≤ 0.040 |
| Sulfur (S) | ≤ 0.020 |
| Silicon (Si) | ≤ 1.0 |
| Chromium (Cr) | 10.5 – 11.7 |
| Nickel (Ni) | ≤ 0.50 |
| Titanium (Ti) | ≥ 6×(C+N) |
| Iron (Fe) | Balance |
Mechanical Properties (Annealed Condition)
| Property | Value |
|---|---|
| Tensile Strength | ≥ 380 MPa |
| Yield Strength | ≥ 170 MPa |
| Elongation | ≥ 20% |
| Hardness | ≤ 88 HRB |
Applications
- ✈️ Aircraft exhaust manifolds
- 🔥 Furnace parts and thermal shields
- 📏 Expansion joints and bellows
- 🏭 Petrochemical piping systems
- 🚚 Automotive and industrial insulation
FAQ – Frequently Asked Questions
- ❓ Q: What is the benefit of titanium in 409 stainless steel?
💡 A: Titanium prevents carbide precipitation, improving weldability and resistance to intergranular corrosion. - ❓ Q: Can 409 be used at high temperatures?
💡 A: Yes, it retains strength and oxidation resistance up to 850°C. - ❓ Q: Is 409 better than 304 for heat resistance?
💡 A: Yes, due to titanium stabilization, 409 offers superior stability in thermal cycling. - ❓ Q: Can I order custom coil widths and finishes?
💡 A: Absolutely, we support slitting and polishing as per your requirements.
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