Steel Strip Profiles
321 Stainless Steel Strip
321 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.
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Product Introduction
321 stainless steel strip is a titanium-stabilized austenitic alloy designed to provide excellent resistance to intergranular corrosion and high-temperature oxidation. With added titanium to suppress carbide precipitation, 321 is ideal for welded structures and applications involving elevated temperatures. It offers similar corrosion resistance to 304 but with better strength retention in heat-exposed environments.
Product Specifications
- Grade: 321 / UNS S32100
- 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 intergranular corrosion
- 🧲 Non-magnetic in annealed condition
- 🔧 Good weldability and high creep strength
- 🌡️ Resists oxidation up to 850°C (1560°F)
Chemical Composition
| Element | Content (%) |
|---|---|
| Carbon (C) | ≤ 0.08 |
| Chromium (Cr) | 17.0 – 19.0 |
| Nickel (Ni) | 9.0 – 12.0 |
| Titanium (Ti) | ≥ 5 × C (min) |
| Manganese (Mn) | ≤ 2.0 |
| Silicon (Si) | ≤ 1.0 |
| Phosphorus (P) | ≤ 0.045 |
| Sulfur (S) | ≤ 0.03 |
Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | ≥ 515 MPa |
| Yield Strength | ≥ 205 MPa |
| Elongation | ≥ 40% |
| Hardness | ≤ 95 HRB |
Equivalent Grades
| Standard | Equivalent |
|---|---|
| UNS | S32100 |
| EN | 1.4541 |
| JIS | SUS 321 |
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 321 stainless steel?
💡 A: Titanium prevents carbide precipitation, improving weldability and resistance to intergranular corrosion. - ❓ Q: Can 321 be used at high temperatures?
💡 A: Yes, it retains strength and oxidation resistance up to 850°C. - ❓ Q: Is 321 better than 304 for heat resistance?
💡 A: Yes, due to titanium stabilization, 321 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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