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Super Duplex stainless steel S32760 (UNS S32760, DIN 1.4501, ASTM F55) is a super duplex grade with a ferritic-austenitic microstructure contains a slightly higher copper and tungsten content compared with S32750, it contains 25% chromium, 7% nickel, 3.6% molybdenum as well as copper, tungsten, and nitrogen. Super Duplex S32760 has very good resistance to localized corrosion and stress corrosion cracking in combination with high mechanical strength.
Stainless steel grade F55 has excellent corrosion resistance to a wide range of areas, especially resistance to pitting and crevice corrosion in seawater and other chloride containing environments, with critical pitting temperature that is more than 50°C (122°F). This material is known to also have high strength and extended lifecycle. It is 10% lighter than grade 316 steel, ideal for sub-zero service, and more cost effective than nickel alloys. Stainless steel grade F55 can be easily machined and welded.
Grade | C≤ | Si≤ | Mn≤ | P≤ | Cr | Ni | S≤ | N | Cu | Mo | W |
S32760 | 0.03 | 1.0 | 1.0 | 0.03 | 24.0-26.0 | 6.0-8.0 | 0.01 | 0.2 -0.3 | 0.5-1.0 | 3.0-4.0 | 0.5-1.0 |
Grade | Tensile, min, ksi[MPa] | Yield, min, ksi[MPa] | Elongation, %(min) | Hardness, HB（max） |
S32760 | 108 [750] | 80 [550] | 25 | 310 |
Density: 7.81 g/cm3
Super Duplex stainless steel S32760 Equivalent Grades
STANDARD | WERKSTOFF NR. | UNS | EN |
Super Duplex S32760 | 1.4501 | S32760 | X2CrNiMoCuWN25-7-4 |
Super Duplex stainless steel S32760 ASTM Specifications
Pipe | Tube | Sheet/Plate | Bar /Rod | Forging /Flange | BW Fittings |
ASTM A790 | ASTM A789 | ASTM A240 | ASTM A276/A479 | ASTM A182 | ASTM A815 |
Super Duplex stainless steel S32760 Application：
Desalination plants
Seawater systems
Heat exchangers
Subsea pipework systems
Flue gas desulphurisation (FGD) plants
Centrifuges and agitators
Storage tanks and pressure vessels
