2205 duplex stainless steel is a nitrogen-added duplex stainless steel (referred to as 2205 duplex steel). Duplex stainless steel 2205 alloy is a duplex stainless steel composed of 21% chromium, 2.5% molybdenum and 4.5% nickel-nitrogen alloy.The domestic 2205 stainless steel products include 2205 stainless steel tubes and 2205 duplex stainless steel seamless tubes; 2205 duplex stainless steel sheets, 2205 stainless steel rods, forgings, pipe fittings and strips.
Its mechanical properties are as follows:
The mechanical properties of the 2205 duplex steel produced depend on the product form and the final heat treatment. In the temperature range of -50 degrees to 280 degrees, duplex stainless steel has good mechanical properties. When the duplex steel is subjected to high temperatures of more than 300 degrees for a long time, its microstructure will change. Compared with austenitic steels, duplex steels and super duplex steel base materials have centripetal resistance to pitting and crack corrosion, but generally have excellent resistance to stress corrosion of organic acids. It is well known in the industry to express pitting resistance levels in accordance with the pitting resistance equivalent value PREN.
On high-speed machines, the feed rate and cutting speed of the 2205 alloy are the same as the 316L. If a carbonized knife is used, the cutting speed is reduced by approximately 20% compared to 316L,and the performance of the machine and its components plays a key role here.
Heat treatment performance
The 2205 alloy should be annealed at a minimum temperature of 1900 °F and then rapidly cooled for water quenching. This treatment is applied to solid solution annealing and stress relief. Stress relief treatment, such as at temperatures below 1900°F, tends to result in the precipitation of harmful metal or non-metal phases.
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