1.4410 Duplex Stainless Steel (also known as S32750 or 2507) is a super duplex stainless steel with excellent strength and corrosion resistance. It combines the best characteristics of austenitic and ferritic stainless steels and is particularly suitable for use in extreme environments.
Main standards and grades:
American (ASTM) standard: ASTM A240, ASTM A789, ASTM A790Grade: UNS S32750
European (EN) standard: EN 10088-2Grade: 1.4410
Japanese (JIS) standard: JIS G4304Grade: SUS 32750
Chinese (GB/T) standard: GB/T 21833Grade: 022Cr25Ni7Mo4N
German (DIN) standard: DIN 17440Grade: X2CrNiMoN25-7-4
1.4410 duplex stainless steel (S32750 or 2507) is a super-duplex stainless steel known for its high strength and excellent corrosion resistance. It shows strong resistance to pitting corrosion, crevice corrosion and stress corrosion cracking in chloride-containing environments, and is widely used in marine engineering, chemical industry, oil and gas industry and other fields. In these areas, the high reliability and long life of 1.4410 duplex stainless steel pipe make it the material of choice.
1.4410 duplex stainless steel performance characteristics:
Corrosion resistance:
1.4410 duplex stainless steel pipe has good resistance to pitting corrosion, crevice corrosion and uniform corrosion due to its high chromium and molybdenum content. It has extremely strong resistance to overall corrosion against organic acids such as benzoic acid and formic acid, and also has extremely strong resistance to corrosion against strong oxidants, especially those containing fluoride. Compared with 904L, 1.4410 has stronger corrosion resistance against dilute hydrochloric acid mixed with chloride ions. In addition, 1.4410 also has strong resistance to pitting corrosion and crevice corrosion in dilute sulfuric acid environments. (Source: Baijiahao)
High strength and toughness:
1.4410 duplex stainless steel pipe has high strength and toughness, allowing it to maintain structural integrity and stability under high pressure and complex stress conditions.
Good processing performance:
1.4410 duplex stainless steel pipe has good weldability, plasticity and processability, and can be processed through conventional welding, cutting, bending and forming processes, making it highly flexible in the manufacturing process. In addition, it also has good wear resistance and fatigue resistance, and is suitable for some high wear and high fatigue application scenarios. (Source: Baijiahao)
Other features:
1.4410 duplex stainless steel pipe also has a low thermal expansion coefficient, which means it has better dimensional stability in high temperature environments. At the same time, it also has good resistance to stress corrosion cracking, which gives it a long service life in some corrosive environments.
The main chemical composition of 1.4410 stainless steel is as follows:
Chromium (Cr): 24-26%
Nickel (Ni): 6-8%
Molybdenum (Mo): 3-5%
Nitrogen (N): 0.24-0.32%
Carbon (C): ≤ 0.03%
Manganese (Mn): ≤ 1.2%
Silicon (Si): ≤ 0.8%
Phosphorus (P): ≤ 0.035%
Sulfur (S): ≤ 0.02%
Copper (Cu): ≤ 0.5%
Iron (Fe): Balance
The mechanical properties of 1.4410 duplex stainless steel are as follows:
Tensile Strength: ≥ 800 MPa
Yield Strength: ≥ 550 MPa
Elongation: ≥ 15%
Hardness:
Brinell hardness (HB): ≤ 310
Due to its excellent corrosion resistance and mechanical properties, 1.4410 duplex stainless steel pipes are widely used in the following fields:
Offshore engineering: offshore platforms, marine equipment and seawater desalination equipment.
Chemical and petrochemical industries: pipelines, heat exchangers and equipment for handling corrosive media.
Oil and gas industry: downhole equipment, oil pipelines and offshore drilling platforms.
Pulp and paper industry: equipment and pipelines in highly corrosive environments.
Environmental engineering: wastewater treatment equipment and discharge pipelines.
Energy industry: equipment for nuclear power plants and other high-demand environments.
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