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Duplex stainless steels[1][2][3][4][5] are a family of stainless steels. These are called duplex (or austenitic-ferritic) grades because their metallurgical structure consists of two phases, austenite (face-centered cubic lattice) and ferrite (body centered cubic lattice) in roughly equal proportions.
Duplex Stainless Steel is a specific group of engineering stainless steel materials consisting of the austenitic and ferritic phases in roughly equal proportions in the microstructure. They are widely popular because of their good corrosion resistance, high strength, and ease of fabrication.
What is Duplex Stainless Steel? Duplex stainless steels get their name from their two-phase microstructure. While exact ratios vary by grade, most duplex steels have a structure that is roughly 50-percent austenite and 50-percent ferrite.
Duplex stainless steels were developed to overcome some limitations of traditional stainless steel grades, such as the popular 304 and 316 types. Compared to these conventional stainless steels, duplex stainless steels exhibit superior mechanical properties—especially regarding strength and toughness.
Duplex Stainless Steels – A Simple Guide. Duplex stainless steels are becoming more common. They are being offered by all the major stainless steel mills for a number of reasons: Higher strength leading to weight saving. Greater corrosion resistance particularly to stress corrosion cracking. Better price stability.
May 18, 2005 · Duplex stainless steels are extremely corrosion resistant, work hardenable alloys. Their microstructures have both austenite and ferrite phases and show properties of both types of stainless steels. The properties, applications and fabrication details are provided for duplex stainless steels.
Duplex stainless steel grades are superior to standard austenitics with regard to stress corrosion cracking resistance. They are also good in a number of acidic and alkaline environments.
Duplex stainless steels are Fe-Ni-Cr alloys consisting of ferritic-austenitic microstructure at room temperature. These steels generally possess beneficial combinations of the austenitic and ferritic phases. Duplex stainless steels exhibit greater toughness and better weldability than ferritic stainless steel (Nilsson, 1992).
Duplex stainless steel, as its name indicates, is a combination of two of the main alloy types. Duplex stainless steels have a mixed microstructure of austenite and ferrite, the aim usually being to produce a 50/50 mix. About Duplex Stainless Steel. Duplex stainless steels, as their name indicates, are a combination of two of the main alloy types.
Duplex stainless steel. Part 1. Contact Us. The name 'duplex' for this family of stainless steels derives from the microstructure of the alloys which comprises approximately 50/50 mixture of austenite and delta-ferrite.
