ASTM A790 UNS S32750 seamless super duplex stainless steel pipe for water treatment
ASTM A790 UNS S32750 seamless pipe offers excellent corrosion resistance, high strength, and durability in chloride and sour environments, making it an ideal choice for water treatment. Its excellent resistance to pitting and stress corrosion cracking makes it suitable for applications such as desalination plants, fire protection systems, and wastewater management systems.
What is ASTM A790 S32750 material?
ASTM A790 UNS S32750 pipe belongs to the super-duplex stainless steel category. Because its yield strength is twice that of austenitic stainless steel, it can be used to manufacture thinner gauge pipe. Its microstructure is 50% ferrite and 50% austenite.
ASTM A790 S32750 is the specification for seamless super-duplex steel pipe. Super-duplex steel is a type of stainless steel with higher strength and corrosion resistance than traditional duplex stainless steel. Super-duplex seamless pipe is widely used in industries such as oil and gas, petrochemical, and chemical processing due to its excellent mechanical properties and corrosion resistance in harsh environments. The seamless construction of these pipes ensures a smooth, uniform surface finish, as well as high strength and durability. They are typically available in a variety of sizes and thicknesses to meet the specific requirements of different applications.
UNS S32750 seamless super duplex stainless steel pipe Chemical Composition:
| Carbon Max. | 0.030 |
| Manganese Max. | 1.20 |
| Phosphorous Max. | 0.035 |
| Sulphur Max. | 0.020 |
| Silicon Max. | 0.80 |
| Chromium | 24.0–26.0 |
| Nickel | 6.0–8.0 |
| Molybdenum | 3.0–5.0 |
| Nitrogen | 0.24–0.32 |
| Iron | Bal. |
| Copper | 0.50 |
UNS S32750 seamless super duplex stainless steel pipe Mechanical Properties:
| Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
| 7.8 g/cm3 | 1350 °C (2460 °F) | Psi – 116000 , MPa – 800 | Psi – 80000 , MPa – 550 | 15 % |
Water Treatment Applications
Desalination Plants: Its chloride resistance is crucial for desalination process equipment.
Wastewater Treatment: Its ability to handle corrosive chemicals and wastewater makes it suitable for wastewater management systems.
Fire Protection Systems: Used in marine firefighting and sprinkler systems.
Water Stabilization Systems: Used in systems requiring high-strength, corrosion-resistant piping.
Heat Exchangers and Condensers: This alloy is commonly used for heat exchanger tubing in water treatment facilities.
Specifications and Standards
Standard: ASTM A790/ASME SA790.
Grade: UNS S32750, also known as Super Duplex Steel 2507.
Seamless Pipe Sizes: Wall thickness range: 0.05 to 20 mm, outside diameter range: 4 to 219 mm.
Testing: Pipes undergo tensile testing, hardening testing, expansion testing, and hydrostatic testing to ensure compliance with standards.
Welding: Excellent weldability is achieved using techniques such as tungsten arc welding, but specific procedures should be followed.
Gnee Steel specializes in the production and sale of various nickel-based alloys, including Nickel 201, Nickel 202, Hastelloy C-276, Hastelloy C-22, Hastelloy B, Hastelloy C-4, Inconel Alloy 600, Inconel 625, Inconel 718, Inconel X-750, Incoloy Alloy 800, Incoloy 800H/HT, Incoloy 825, Monel Alloy 400, Monel K500, and high-temperature alloys. Gnee Steel's products are widely used in aerospace, chemical, electric power, automotive, and nuclear energy applications. We also offer customized alloy solutions tailored to customer needs. For alloy pricing inquiries or customized alloy solutions, please contact us for a quote at ss@gneesteel.com.
