Super Duplex Stainless Steel UNS S32760, UNS S39274
Super Duplex Stainless Steels UNS S32760 and UNS S39274 are specialized grades developed for the most challenging environments. These super duplex alloys are highly valued for their superior strength, corrosion resistance, and ability to withstand extreme temperatures and pressures. Commonly used in industries like oil and gas, chemical processing, marine, and desalination, these materials are suitable for applications exposed to corrosive substances, including chlorides and harsh chemicals.
Key Features of Super Duplex Stainless Steel UNS S32760 and UNS S39274
- Exceptional Corrosion Resistance: Both S32760 and S39274 provide excellent resistance to pitting, crevice corrosion, and chloride stress corrosion cracking. Their high alloy content makes them particularly effective in saltwater and acidic environments.
- Superior Strength and Toughness: These alloys offer nearly double the strength of standard austenitic stainless steels, allowing for thinner, lighter structures that maintain durability and safety.
- High Resistance to Erosion and Fatigue: Designed for harsh, high-stress applications, S32760 and S39274 excel in environments with dynamic forces, abrasion, and erosion.
- Enhanced Weldability: These super duplex grades can be welded with standard welding techniques, making them suitable for a wide range of fabrication processes.
- Cost-Effectiveness: The high strength-to-weight ratio of these alloys allows for thinner material use, reducing overall project costs.
Chemical Composition
- Super Duplex UNS S32760:
- Chromium (Cr): 24-26%
- Nickel (Ni): 6-8%
- Molybdenum (Mo): 3-4%
- Copper (Cu): 0.5-1.0%
- Tungsten (W): 0.5-1.0%
- Nitrogen (N): 0.24-0.32%
- Iron (Fe): Balance
- Super Duplex UNS S39274:
- Chromium (Cr): 25-27%
- Nickel (Ni): 6-8%
- Molybdenum (Mo): 3-4%
- Tungsten (W): 0.5-1.0%
- Copper (Cu): 0.5-1.0%
- Nitrogen (N): 0.2-0.3%
- Iron (Fe): Balance
The specific composition of these alloys provides enhanced pitting and corrosion resistance, with tungsten improving their stability in harsh chemical environments.
Mechanical Properties
- Super Duplex UNS S32760:
- Tensile Strength: 750 MPa (minimum)
- Yield Strength: 550 MPa (minimum)
- Elongation: 25%
- Hardness: 30 HRC (maximum)
- Super Duplex UNS S39274:
- Tensile Strength: 750-850 MPa
- Yield Strength: 550 MPa (minimum)
- Elongation: 25%
- Hardness: 28-32 HRC
These high-strength properties make S32760 and S39274 suitable for applications requiring both toughness and flexibility, such as offshore and heavy machinery.
Applications of Super Duplex 2507 and 255
- Oil and Gas Exploration: These super duplex steels are widely used in offshore oil platforms, pipelines, and subsea equipment, where high corrosion resistance and durability are essential.
- Chemical Processing: With their resistance to acidic and chloride-rich environments, these alloys are ideal for storage tanks, reactors, and process piping in the chemical industry.
- Desalination and Water Treatment: The alloys are perfect for desalination plants, water treatment facilities, and heat exchangers due to their chloride resistance and ability to withstand high pressures.
- Marine Engineering: Used in marine shafts, propellers, and other components exposed to seawater, these super duplex grades offer outstanding corrosion protection.
- Mining and Construction: The high strength and erosion resistance of S32760 and S39274 make them suitable for mining operations and heavy construction applications where materials are exposed to abrasive forces.
Manufacturing Standards
Both UNS S32760 and UNS S39274 are produced according to international standards to ensure consistent quality and performance:
- ASTM A240: Standard Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels.
- ASTM A790: Standard Specification for Seamless and Welded Ferritic/Austenitic Stainless Steel Pipe.
- ASTM A182: Standard Specification for Forged or Rolled Alloy and Stainless Steel Pipe Flanges, Fittings, Valves, and Parts.
- ASME SA240, SA789, SA790: ASME standards for use in pressure vessels and structural applications.
Available Forms and Customization Options
- Forms: Available as plates, sheets, bars, rods, pipes, tubes, and fittings.
- Dimensions: Standard sizes as well as customized dimensions for specific project requirements.
- Surface Finishes: Mill finish, polished, and custom surface treatments are available.
- Heat Treatments: Solution annealing available to enhance mechanical and corrosion-resistant properties.
Quality Assurance and Certifications
Our super duplex products undergo rigorous quality assurance testing to meet the highest standards:
- Mechanical Testing: Confirms strength, elongation, and hardness for compliance with project specifications.
- Corrosion Testing: Validates resistance to pitting, crevice corrosion, and chloride stress corrosion cracking.
- Dimensional Accuracy: Precision machining and cutting to meet exact tolerances.
FAQs
Products
Industry We Serve
- Oil & Gas industries
- Chemical process industries
- Pump and valve in high pressure component
- Food industries
- Pulp and paper industry
- Aerospace industry
- Power plant
- Mechanical component
- Sugar industry
- Cement industry