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316/304 Duples stainless steel
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| Product name | 2205,2705,2101,2304,1805; |
| Product specification | Thickness 2.0~60mm, width 1500~2500mm; |
| Product use | For paper making, petrochemical, shipbuilding, nuclear power, pressure vessel, seawater desalination, water pump, transportation, machinery manufacturing, environmental protection, container and other industries; |
| Product features | Many varieties, full specifications, superior performance, wide use, has obtained a variety of related industry certification; |
| Product performance | High strength, yield strength is twice that of 18-8 stainless steel, good pore corrosion resistance and chloride stress corrosion resistance, welding thermal crack tendency is small, large thermal conductivity, small line expansion coefficient, conducive to processing hardening, high energy absorption, good impact resistance; |
| Product market dynamics | With the rapid development of China's economy, the corrosion resistance and strength of materials are becoming higher and higher, and with the large fluctuation of raw material costs, the development of energy-saving materials is more and more favored by users, dual-phase steel has the above advantages, more and more widely used in all walks of life, the market prospect is broad. |
316/304 Duplex Stainless Steel:
Duplex stainless steel is a type of stainless steel alloy that combines the benefits of both austenitic and ferritic stainless steels. The name "duplex" reflects the dual-phase microstructure of the alloy, consisting of both austenitic (face-centered cubic crystal structure) and ferritic (body-centered cubic crystal structure) phases. This unique combination of microstructures imparts a set of properties that make duplex stainless steel particularly well-suited for a variety of demanding applications.
Composition:
Duplex stainless steels typically contain a significant amount of chromium (ranging from 19% to 32%) and nickel (about 5% to 8%), similar to austenitic stainless steels. Additionally, they have a higher content of molybdenum (up to 5%) and sometimes other alloying elements like nitrogen and manganese. The specific alloy composition varies depending on the grade of duplex stainless steel.
Key Properties:
Corrosion Resistance:Duplex stainless steel offers excellent corrosion resistance, particularly in aggressive environments such as chloride-containing solutions. This makes it suitable for applications in chemical processing, marine environments, and oil and gas industries.
High Strength:Duplex stainless steel exhibits higher strength compared to both austenitic and ferritic stainless steels. This enhanced strength allows for the use of thinner sections in structural components, contributing to weight reduction in various applications.
Good Toughness and Ductility:Duplex stainless steel maintains good toughness and ductility even at low temperatures, which is advantageous in applications where impact resistance is important.
Stress Corrosion Cracking Resistance:Duplex stainless steel has better resistance to stress corrosion cracking than austenitic stainless steels, especially in chloride-rich environments.
Weldability:Although duplex stainless steel is not as easily welded as austenitic stainless steel, modern welding techniques and proper procedures make it feasible to achieve strong and reliable welds in duplex materials.
Applications:
Due to its unique combination of properties, duplex stainless steel is used in various industries and applications, including:
Chemical Processing:Equipment such as pressure vessels, piping systems, and heat exchangers in chemical processing plants benefit from the corrosion resistance and strength of duplex stainless steel.
Oil and Gas:Duplex stainless steel is used in offshore and onshore oil and gas facilities for pipes, valves, and other components exposed to corrosive environments.
Desalination:The corrosion resistance of duplex stainless steel makes it suitable for desalination plants where it is exposed to seawater.
Marine Engineering:Components such as propellers, shafts, and fasteners in marine environments benefit from the corrosion resistance and strength of duplex stainless steel.
Structural Applications:Duplex stainless steel is employed in structural components for architecture and construction, especially in environments with corrosive elements.
In conclusion, duplex stainless steel is a versatile material that combines the best attributes of both austenitic and ferritic stainless steels. Its unique properties make it an excellent choice for applications where corrosion resistance, strength, and toughness are critical requirements. As technology advances, the development of new duplex stainless steel grades continues to expand its range of applications in various industries.
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