Super Duplex Stainless Steel UNS S32760, UNS S39274
UNS S32760 and UNS S39274 Super Duplex Stainless Steels are highly engineered grades that were designed for the toughest applications. These super duplex alloys are incredibly desirable for their strength, corrosion resistance, and capability for elevated temperature and pressure applications. These materials are generally used in the oil and gas, chemical processing, marine, and desalination industries, typically exposed to corrosive materials like chlorides and severe chemicals.
Main Characteristics of Super Duplex Stainless Steel UNS S32760 and UNS S39274
- Superior Corrosion Resistance: S32760 and S39274 have highly resistant properties to pitting, crevice corrosion and chloride stress corrosion crack. Their high–nickel content makes them ideal for saltwater and acidic environment applications.
- Superior Strength and Toughness: S32760 and S39274 provide nearly twice the strength of typical austenitic stainless steels, which allows for thinner, lighter structures while still maintaining durability and safety. High Erosion and Fatigue Resistance: S32760 and S39274 are designed for a high-stress environment and, therefore, are adept in environments that have dynamic forces, abrasion, and/or erosion.
- Superior Weldability: These super duplex grades can be welded and used with standard welding procedures, which makes them applicable for many fabrication procedures.
- Cost-Effectiveness: The high strength-to-weight ratio of super duplex alloys allows them to be thinner materials and can reduce 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 alloy composition provides better pitting and corrosion resistance, and tungsten can improve 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
The high strength of S32760 and S39274 makes them useful in applications that require toughness and flexibility, such as offshore and heavy machinery applications.
Applications of Super Duplex 2507 and 255
- Oil and gas exploration: Super duplex steels are extensively used in offshore oil platforms, subsea equipment, and pipelines because of their corrosion resistance and durability requirements.
- Chemical processing: Because super duplex alloys perform well in very acidic and chloride-rich environments, they are used in storage tanks, reactors, and process piping.
- Desalination and water treatment: Super duplex alloys are suitable for the desalination plant, water treatment facility, and heat exchanger applications because of their chloride resistance and resistance to high pressures.
- Marine engineering: Super duplex grades are used in marine shafts, propellers, and other components exposed to seawater. The corrosion protection with these materials is outstanding.
- Mining and construction: The strength and erosion resistance of S32760 and S39274 make them suitable for mining operations and heavy industrial construction applications when materials are being exposed to abrasive forces.
Manufacturing Specifications
UNS S32760 and UNS S39274 are both manufactured following internationally accepted specifications requirements to meet your quality and performance expectations:
- 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 pressure vessels and structural applications
Forms and Customization
- Forms: Plates, sheets, bars, rods, pipes, tubes, and fittings.
- Dimensions: Standard and custom project dimensions.
- Surface Finishes: Mill finish, polished, and custom surface finishes.
- Heat Treatments: Solution annealing to improve mechanical and corrosion-resistant properties.
Quality Assurance Tests and Certifications
Our super duplex products undergo rigorous quality assurance tests to ensure they meet the highest standards:
- Mechanical Tests: Verify strength, elongation, and hardness to project specifications.
- Corrosion Tests: Verify resistance to pitting, crevice corrosion, and chloride stress corrosion cracking.
- Dimensional Accuracy: Machined and cut to ensure precision 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