Description
UNS 32760 - F55
UNS S32760 is a highly alloyed super duplex stainless steel with a high PREN that is designed for use in aggressive environments. UNS S32760 is a high-performance super duplex stainless steel with a high PREN. Chromium is present in 25% concentrations, nickel in 7% concentrations, and molybdenum in 3.6% concentrations; it also contains trace amounts of copper, tungsten, and nitrogen.This is a ferritic-austenitic superduplex grade with a high degree of ferriticity. Depending on the alloy, it contains 40–50 percent ferrite in its annealed state.The super duplex microstructure combines the strength of ferritic grades with the corrosion resistance of austenitic grades to produce a material that is both strong and corrosion resistant. Chloride-induced stress cracking, which is stainless steel's Achilles' heel, is frequently addressed with the metal as a practical solution to the problem. Additionally, it exhibits exceptional resistance to sulphide-stress corrosion cracking in sour-gas environments, making it an excellent choice for corrosive environments.
Although UNS S32760 is well-known for having a high impact strength, it does not show any evidence of a ductile-brittle transition and only shows a slight reduction in impact energy as the temperature drops. Even when welded, the impact strength of UNS S32760 is only marginally reduced. It was initially developed as a seawater-resistant material for pump applications in the North Sea. Following its success, it was sought after for a wide range of applications, including oil and gas applications, seawater, subsea pipework systems, heat exchangers, and other similar applications.