Overview
ABSTRACT
This article discusses stainless steels, known as austenitic-ferritic. Discovered in the 1930s, they are biphasic alloys with a 50% α (ferrite) and 50% γ (austenite) structure, obtained through a specific chemical composition including carbon, chromium, and nickel. They are produced in an electric furnace followed by a refining process, ensuring the reproducibility of chemical compositions. These steels have mechanical characteristics superior to austenitic stainless steels, particularly in tensile strength and yield strength. They are suitable for the chemical industry due to their resistance to corrosion and abrasion, especially within a temperature operating range between -50°C and +300°C.
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Thibault FOURCADE : Engineer
INTRODUCTION
Austeno-ferritic steels, born in the 1930s, symbolize a major advance in the field of metal alloys, combining the properties of austenitic and ferritic steels. Their carefully balanced chemical composition, incorporating carbon, chromium and nickel, gives rise to a distinctive two-phase structure. The manufacturing process, carried out in an electric furnace followed by refining, ensures reproducible chemical compositions, which are crucial to the alloy's intrinsic properties.
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KEYWORDS
austenitic-ferritic steels | corrosion resistance | mechanical characteristics
The particularities of stainless steels
Martensitic steels
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