We have always strived for high quality, high technology, high efficiency hydraulic cylinder piston rods, wall tube boiler, ti pipe and high level of service. The company has formed a scientific and effective technical service system, continuously strengthened its service efforts, and continuously improved its service level. We take it as our mission to create value for customers, wealth for society, returns for shareholders, and a future for employees. We realize that it is our responsibility to protect the earth and green development, and it is an inevitable action for our company's sustainable development. Under the macro background of sustained economic growth, our company continuously improves production technology, increases production scale and expands market share to improve the overall competitiveness.
ASTM A928 UNS S32750 Super Duplex Tube
Material
ASTM A928 UNS S32750 is a super duplex stainless steel that combines the beneficial properties of both austenitic and ferritic stainless steels. This grade is known for its high strength, excellent corrosion resistance, and good weldability, making it suitable for various demanding applications.
Specification
The ASTM A928 specification covers the requirements for duplex stainless steel tubes intended for use in corrosive environments. This specification ensures that the material meets specific mechanical and chemical properties, making it reliable for industrial applications.
Key Features
High Strength: UNS S32750 exhibits superior mechanical strength compared to standard austenitic stainless steels.
Corrosion Resistance: Excellent resistance to pitting, crevice corrosion, and stress corrosion cracking, particularly in chloride environments.
Good Weldability: Suitable for various welding techniques, including TIG and MIG welding.
Thermal Stability: Maintains mechanical properties at elevated temperatures, making it suitable for high-temperature applications.
Chemical Composition
| Element | Composition (%) |
| Carbon (C) | ≤ 0.03 |
| Manganese (Mn) | 0.8 - 1.5 |
| Phosphorus (P) | ≤ 0.03 |
| Sulfur (S) | ≤ 0.01 |
| Silicon (Si) | ≤ 1.0 |
| Chromium (Cr) | 24.0 - 26.0 |
| Nickel (Ni) | 6.0 - 8.0 |
| Molybdenum (Mo) | 3.0 - 5.0 |
| Nitrogen (N) | 0.24 - 0.32 |
| Iron (Fe) | Balance |
Mechanical Properties
| Property | Value |
| Yield Strength (MPa) | ≥ 550 |
| Ultimate Tensile Strength (MPa) | ≥ 800 |
| Elongation (%) | ≥ 25 |
| Hardness (HB) | ≤ 250 |
Physical Properties
| Property | Value |
| Density (g/cm³) | 7.8 |
| Melting Point (°C) | 1350 - 1400 |
| Thermal Conductivity (W/m·K) | 14.5 |
| Specific Heat (J/kg·K) | 500 |
Process Performance
| Process | Performance |
| Welding | Good |
| Machining | Moderate |
| Forming | Good |
| Heat Treatment | Not recommended |
Steel Grade
UNS S32750 is classified as a super duplex stainless steel, which means it has a microstructure that contains both austenite and ferrite phases. This unique structure provides a combination of high strength and excellent corrosion resistance. It is particularly effective in environments where chloride-induced corrosion is a concern, such as in marine applications and chemical processing.
Application
The UNS S32750 super duplex tube is widely used in various industries, including:
Oil and Gas: For pipelines and equipment exposed to harsh environments.
Chemical Processing: In reactors, heat exchangers, and storage tanks.
Marine Applications: For components exposed to seawater.
Pulp and Paper: In bleaching and chemical recovery processes.
Possible Alternative Grades
While UNS S32750 is a preferred choice for many applications, there are alternative grades that may be suitable depending on specific requirements:
UNS S31803: A duplex stainless steel with slightly lower corrosion resistance.
UNS S32205: Another duplex grade with similar properties but different chemical composition.
UNS S32760: A super duplex grade with higher molybdenum content for enhanced corrosion resistance.
Over the years of operation, we have established a complete set of production and supply channels, and the price is very competitive in the industry of ASTM S32304 Super Duplex Seamless Stainless Steel Tube (EN X2CrNiN23-4/1.4362). In the course of our journey, we have been united in our commitment to management innovation, technological innovation and social responsibility. In terms of technical training, we provide relevant technical training so that we can provide customers with good services at any time.
Hot Tags: astm a928 uns s32750 super duplex tube, China, suppliers, manufacturers, factory, customized, wholesale, price, OEM, mill, producer, for sale, st52 tube, reducing tee pipe, stainless steel, carbon steel boiler tubes, hydraulic honed tube, cold drawn tube