Duplex Steel 2205 Round Bars have a chromium content of 22%, a molybdenum content of 3%, and a nickel content of 5%–6%. They also have high levels of general, localized, and stress corrosion resistance, as well as outstanding impact toughness and high strength.
In practically all corrosive conditions, Duplex Steel 2205 Round Bars offers superior pitting and crevice corrosion resistance than austenitic stainless steels 316L and 317L.
Additionally, duplex 1.4462 round bar offers higher corrosion and fatigue resistance than austenitic, as well as low thermal expansion and strong thermal conductivity.
Duplex hex bars should be annealed at a minimum temperature of 1900°F, then quickly cooled, ideally by water quenching. Additionally, this method is effective for both solution annealing and stress reduction. Treatments for stress alleviation at any lower temperature run the danger of damaging intermetallic or nonmetallic phase precipitation.
Because the yield strength of 2205 duplex flat bars is roughly double that of austenitic stainless steels, they are lighter and more affordable than stainless steel 316L.
With high-speed steel tooling, duplex square bar can be machined at the same feeds and speeds as stainless steel 316L. It can be successfully welded. The goal of welding duplex steel is to maintain the base metal’s corrosion resistance, hardness, and strength in the weld metal and heat-affected zone. It can be welded easily, but the welding process must be planned to avoid precipitating harmful intermetallic or nonmetallic phases and to lead to a desirable phase balance after welding.
