In the vast field of material science, stainless steel occupies a pivotal position in many industrial applications with its unique corrosion resistance, high strength, and good mechanical properties. As the leader in the stainless steel family, S25073 duplex stainless steel shines in many fields such as high-end manufacturing, oil and gas, the chemical industry, and seawater desalination with its excellent comprehensive performance.
S25073 stainless steel pipe S25073 duplex stainless steel seamless pipe details
The products of S25073 duplex stainless steel seamless pipe shall comply with the requirements of TSG D7002 pressure piping component type test rules.
Chemical composition of S25073 duplex stainless steel seamless pipe: carbon: ≤0.030, silicon: ≤0.80, manganese: ≤1.20, phosphorus: ≤0.035, sulfur: ≤0.015, nickel: 6.00~8.00, chromium: 24.0.0~26.0, molybdenum: 3.00~5.0, nitrogen: 0.21~0.32, copper: ≤0.50
Common specifications of S25073 duplex stainless steel seamless pipe: outer diameter 57mm~2680mm, thickness: 1.2mm~60mm.
Delivery status of S25073 duplex stainless steel seamless pipe: heat treatment + pickling.
S25073 Duplex Stainless Steel Overview
S25073, also known as UNS S32750 or F53, is a super duplex stainless steel with a microstructure consisting of approximately 50% austenite and 50% ferrite. This unique two-phase structure gives it excellent corrosion resistance, high strength, and good toughness. Compared with austenitic stainless steel, S25073 has higher strength and better resistance to chloride stress corrosion cracking (SCC); compared with ferritic stainless steel, it has better toughness and weldability. In addition, the material also has good resistance to pitting, crevice corrosion, and uniform corrosion, especially in media with high concentrations of chloride ions (such as seawater environments).
The manufacturing process of S25073 duplex stainless steel seamless pipe
The production process of S25073 duplex stainless steel seamless pipe combines precise material ratios, advanced smelting technology, and strict quality control. First, the raw materials are melted in an electric arc furnace or induction furnace to ensure the accurate addition of alloying elements; then, impurities are removed by methods such as oxygen blowing or vacuum degassing to improve the purity of the steel. During the hot rolling or cold drawing process, the seamless tube billet is formed through precise temperature control and deformation treatment, which is essential to maintain the uniformity of the duplex structure. After that, solid solution treatment is carried out, usually at 1040°C to 1150°C for a period of time, and then rapidly cooled to optimize the microstructure and properties of the material. Finally, according to the application requirements, surface treatments such as pickling and passivation may be required to improve corrosion resistance and surface finish.
Excellent performance characteristics of S25073 duplex stainless steel seamless pipe
1. High strength and toughness: The yield strength and tensile strength of S25073 duplex stainless steel are higher than those of ordinary austenitic stainless steel while maintaining good impact toughness, which makes it perform better under high pressure and high-stress environments.
2. Excellent corrosion resistance: Its excellent resistance to chloride corrosion, especially in high temperature and high concentration chloride ion environments, makes S25073 an ideal choice for harsh environments such as marine engineering and the petrochemical industry.
3. Good weldability: Although the welding of duplex stainless steel is more complicated than that of single-phase stainless steel, by selecting suitable welding materials, optimizing welding parameters, and taking appropriate post-weld heat treatment measures, S25073 can still achieve good welded joint performance and maintain the balance of duplex structure.
4. Thermal stability: At high temperatures, S25073 can still maintain good corrosion resistance, is not prone to sensitization, and avoids the risk of intergranular corrosion.
Application areas of S25073 duplex stainless steel seamless pipe
1. Petroleum and natural gas industry: pipelines, oil well casings, wellhead devices, etc. used to transport corrosive oil and gas media. Especially in deep-sea development and acidic oil and gas field development, S25073 duplex stainless steel seamless pipes have shown incomparable advantages.
2. Chemical and pharmaceutical: In tanks, reactors, heat exchangers, and piping systems containing corrosive chemicals, S25073 is an ideal material for reducing maintenance costs and extending equipment life due to its excellent corrosion resistance and high strength.
3. Seawater desalination and water treatment: The evaporator, condenser, piping system of the seawater desalination plant, and the aeration tank, sedimentation tank, and other structures of the sewage treatment plant, S25073 can effectively resist the corrosion of seawater and ensure the long-term stable operation of the system.
4. Papermaking and food processing: In an environment where high hygiene standards are required and the medium is corrosive, S25073 seamless steel pipe is also widely used in the manufacture of papermaking machines and food processing equipment due to its easy-to-clean and pollution-free characteristics.
Challenges and solutions faced by S25073 duplex stainless steel seamless steel pipe
Although the S25073 duplex stainless steel seamless steel pipe has many advantages, it also faces some challenges in practical applications, such as welding quality control, cost control, and material processing difficulty. In response to these problems, experts and technicians in the industry continue to explore and innovate, develop more efficient welding technology, optimize alloy composition to reduce production costs and improve material forming rate and processing efficiency through advanced processing equipment and technology.
Conclusion
S25073 duplex stainless steel seamless pipe, with its excellent comprehensive performance, has shown great application potential in many high-end manufacturing fields. With the continuous advancement of materials science and continuous optimization of manufacturing processes, it is believed that S25073 will play its unique value in more fields and contribute to the scientific and technological progress and sustainable development of related industries. In the future, with the continuous improvement of material performance requirements, the research and application of S25073 duplex stainless steel will be more in-depth, opening up a broader application prospect.
Post time: Jun-17-2025