Duplex stainless steel with a pitting resistance equivalent number (PREN) greater than 40 is referred to as super duplex stainless steel. The following are some of the most common features of super duplex stainless steels:
In chloride-containing settings, it has excellent resistance to stress corrosion cracking.
Tensile and yield strength are both high.
In general, the alloy comprises at least 25% chromium, 7% nickel, 3.6 percent molybdenum, and 0.2 percent nitrogen, though these percentages can vary depending on the grade.
Applications of Super Duplex Steel Bars
A Super Duplex stainless steel is high-alloy duplex steel that combines the strengths of ferritic and austenitic steel. It has a higher strength and corrosion resistance than ferritic steel grades. Oil and gas pipelines, seawater heat exchangers, saltwater handling equipment, desalination equipment, scrubber systems in power plants, process vessels holding aggressive media, and liquefied natural gas tanks are all examples of super duplex stainless steel applications.
Duplex stainless steel is a type of stainless steel that has both austenite and ferrite microstructures. Duplex stainless steel has a microstructure that gives it more strength than austenitic stainless steel with similar corrosion resistance. The minimum yield strength of Alloy 2205 duplex stainless steel (UNS S32205, 1.4462) is 65ksi (450MPa), compared to only 25ksi (170MPa) for Alloy 316L. (UNS S31603, 1.4404).
Duplex stainless steel bars are a form of corrosion-resistant stainless steel bar that is quite simple to manufacture. They have the best of both austenitic and ferritic stainless steel properties. These qualities include crack resistance, great strength, and toughness.
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