aisi 321 annealed stainless steel plate
Sep 02, 2025
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What is AISI 321 annealed stainless steel plate?
AISI 321 annealed stainless steel is a titanium-stabilized austenitic stainless steel designed to provide excellent corrosion resistance, high-temperature performance, and weldability. This makes it an ideal choice for demanding industrial applications, particularly those subject to oxidizing conditions and frequent heat exposure.
Annealing AISI 321 stainless steel plate significantly improves its corrosion resistance, particularly intergranular corrosion. It resists cracking during processing, such as bending and stamping, even at temperatures up to 870°C (1600°F). Annealing also improves the material's resistance to fracture at low temperatures or under impact loading. It is suitable for high-temperature applications such as boilers, furnaces, and aerospace.
AISI 321 Annealed Stainless Steel Plate Specifications
| Feature | Description |
|---|---|
| Type | Austenitic stainless steel, titanium stabilized |
| Chemical Composition | Cr: 17–19%, Ni: 9–12%, Ti: ~0.5%, C: ≤0.08% |
| High-Temperature Performance | Suitable for continuous use up to 900°C |
| Mechanical Properties | Tensile Strength: 515–720 MPa, Yield Strength: 205–310 MPa |
| Weldability | Excellent; titanium stabilization prevents carbide precipitation |
| Formability | Good for rolling, bending, and forming |
| Surface Finish | 2B, BA, No.4, or mirror polished |
321 Stainless Steel sheets Chemical Composition
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.08 max |
| Chromium (Cr) | 17.0 – 19.0 |
| Nickel (Ni) | 9.0 – 12.0 |
| Titanium (Ti) | 0.34 – 1.0 |
| Manganese (Mn) | 2.0 max |
| Silicon (Si) | 1.0 max |
| Phosphorus (P) | 0.045 max |
| Sulfur (S) | 0.03 max |
| Iron (Fe) | Balance |
321 Stainless Steel Sheets Mechanical Properties (Annealed Condition):
| Property | Typical Value | Unit |
|---|---|---|
| Tensile Strength (Rm) | 515 – 720 | MPa |
| Yield Strength (0.2% Proof) | 205 – 310 | MPa |
| Elongation (A5) | 40 – 50 | % |
| Hardness (Brinell) | 150 – 200 | HB |
| Modulus of Elasticity | 200,000 | MPa |
| Density | 8.0 | g/cm³ |
| Thermal Conductivity | 16.2 | W/m·K |
| Specific Heat | 500 | J/kg·K |
| Melting Point | 1450 – 1510 | °C |
Applications of AISI 321 Annealed Stainless Steel plate
Chemical processing equipment (reactors, heat exchangers)
Aerospace components (engine parts, exhaust systems)
Automotive exhaust systems and turbochargers
High-temperature furnace components and heat treatment equipment
Food processing machinery and pharmaceutical equipment
Where can I buy AISI 321 annealed stainless steel sheets, plates, and coils?
GNEE Stainless Steel utilizes efficient tools such as laser cutting machines, CNC punching machines, and polishing equipment to process a wide range of 321 stainless steel sheets, ranging in thickness from 0.3mm to 8mm, ensuring that the products meet international standards such as ASTM A240. Each batch undergoes rigorous quality inspections before shipment, including checks on surface finish, thickness tolerance, and dimensional accuracy, to ensure that the products meet customer requirements.
| Thickness (mm) | Width (mm) | Length (mm) | Surface Finish | Availability |
|---|---|---|---|---|
| 1.0 – 6.0 | 1000 – 2000 | 2000 – 6000 | 2B / BA | In Stock |
| 6.0 – 25.0 | 1200 – 2500 | 2500 – 8000 | No.4 / Mirror | In Stock |
| >25.0 | Custom | Custom | Polished / Mirror | On Order |
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