ASTM A240 (UNS S32205 / S31803) Stainless Steel Sheet
Top A240 (UNS S32205 / S31803) Stainless Steel Sheet Manufacturer in China
ASTM A240, encompassing UNS S32205 and S31803, stands as the foremost choice for applications demanding superior strength and exceptional corrosion resistance. This duplex stainless steel, with its balanced ferritic-austenitic microstructure, delivers a powerful combination of mechanical properties and robust performance in harsh conditions. Its composition, typically including 22% chromium, 3% molybdenum, and 5-6% nickel, makes it a highly versatile and reliable material for a wide range of industrial applications.
Discover high-quality A240 (UNS S32205 / S31803) stainless sheet products here.
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Characteristics of A240 (UNS S32205 / S31803) Stainless Steel
- Exceptional Corrosion Resistance: This duplex stainless steel provides outstanding resistance to various forms of corrosion.
- High Strength and Toughness: A defining characteristic of this material is its high yield strength, which is typically double that of common austenitic stainless steels.
- Excellent Weldability: ASTM A240 (UNS S32205 / S31803) exhibits good weldability, even in thick sections.
- Dual-Phase Microstructure: This unique structure is the source of its desirable combination of properties, blending the high strength of ferritic steels with the corrosion resistance and fabricability of austenitic steels.
- Cost-Effective Performance: While offering superior performance in many aspects, duplex stainless steel is often more cost-effective than super austenitic alloys.
- Favorable Physical Properties: The lower thermal expansion makes it suitable for applications involving joining with carbon steel.
- Versatility in Demanding Applications: The robust properties of this stainless steel make it suitable for a wide array of demanding industries.
- Broad Industrial Usage: Its durability also makes it a preferred material for cargo tanks on ships and trucks, as well as for various components in biofuel plants and pollution control systems.
A240 (UNS S32205 / S31803) Stainless Steel Technical Specifications
| Element | Content (%) UNS S32205 | Content (%) UNS S31803 |
|---|---|---|
| Chromium (Cr) | 22.0 - 23.0 | 21.0 - 23.0 |
| Nickel (Ni) | 4.5 - 6.5 | 4.5 - 6.5 |
| Molybdenum (Mo) | 3.0 - 3.5 | 2.5 - 3.5 |
| Nitrogen (N) | 0.14 - 0.20 | 0.08 - 0.20 |
| Manganese (Mn) | 2.0 max | 2.0 max |
| Silicon (Si) | 1.0 max | 1.0 max |
| Carbon (C) | 0.030 max | 0.03 max |
| Phosphorus (P) | 0.030 max | 0.03 max |
| Sulfur (S) | 0.020 max | 0.02 max |
| Property | Typical Value |
|---|---|
| Tensile Strength, min | 621 - 655 MPa |
| Yield Strength (0.2% offset), min | 448 - 450 MPa |
| Elongation in 2 in. (50 mm), min | 25% |
| Hardness, Brinell (max) | 293 |
| Hardness, Rockwell C (max) | 32 |
| Property | Typical Value |
|---|---|
| Density | 7.8 g/cm³ |
| Modulus of Elasticity | 200 GPa |
| Thermal Conductivity | 19.0 W/m-K |
| Coefficient of Thermal Expansion (0-100°C) | 13.7 µm/m°C |
| Melting Range | 1385 - 1443 °C (2525 - 2630 °F) |
- ASTM: A240 (for plate, sheet, and strip), A182 (for forgings, with designations F51 for S31803 and F60 for S32205), A276, A479, A789, A790, A815
- UNS: S32205, S31803
- EN / DIN: 1.4462, X2CrNiMoN22-5-3
- JIS: SUS 329J3L
- BS: 318S13
- AFNOR: Z3CND22-05AZ
Common Applications of A240 (UNS S32205 / S31803) Stainless Steel
Oil and Gas Exploration & Production
Chemical Processing and Storage
Pulp and Paper Industry
Food and Beverage Processing
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ASTM A240 (UNS S32205 / S31803) Stainless Steel Sheet Customization
Beyond our standard inventory, we provide comprehensive processing and fabrication services to deliver ASTM A240 (UNS S32205 / S31803) duplex stainless steel sheets that align perfectly with your project’s specific demands.
- Precision Cutting and Shearing: We offer advanced cutting services to meet your exact dimensional needs.
- Custom Thickness and Gauge: Our sheets are available in a broad spectrum of thicknesses suitable for everything from lightweight components to heavy-duty structural applications.
- Specialized Surface Finishing: Choose from a wide array of surface finishes to meet both functional and aesthetic goals.
- Advanced Fabrication Services: We provide extensive value-added fabrication services to create components that are ready for assembly.
Contact our technical team to discuss your custom fabrication needs.
Contact Us
The success of your critical application rests on superior materials. We are your trusted source for certified ASTM A240 (UNS S32205 / S31803) duplex steel, offering custom processing to meet your exact needs.
Contact our specialists now for a detailed quote and expert guidance. Let us ensure the longevity and performance of your project.
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