Definition

austenitic steel (noun): A type of stainless steel alloyed with sufficient amounts of specific elements, such as nickel, chromium, and/or manganese, to stabilize its austenitic crystalline structure at normal ambient temperatures. This structure provides the steel with non-magnetic properties, high ductility, and excellent corrosion resistance.

Usage

This is a technical term used primarily in metallurgy, materials science, and engineering. * It functions as a countable noun (e.g., an austenitic steel, various austenitic steels) or as an uncountable noun referring to the material category. * It is often modified by the specific alloy series (e.g., 300-series austenitic steel).

Examples

• Noun:
  • The chemical processing plant uses pipes made from austenitic steel for their superior resistance to corrosive fluids.
  • Type 304 is the most common austenitic steel, widely used in kitchen sinks and architectural applications.
  • Because it is non-magnetic, austenitic steel is often used in applications near sensitive electronic equipment.

Advanced Usage

• "austenitic stainless steel": This is a more precise and commonly used full term, explicitly linking the austenitic structure to the stainless steel family.
  • The surgical instruments are fabricated from high-grade austenitic stainless steel.

Variants and Related Words

• Austenite (noun): The face-centered cubic crystalline phase of iron-based alloys, characterized by its non-magnetic nature and ability to hold more carbon in solid solution than ferrite.
• Ferritic steel (noun): A type of stainless steel with a body-centered cubic crystal structure, which is magnetic and generally has lower corrosion resistance than austenitic grades.
• Martensitic steel (noun): A very hard, strong, and magnetic type of stainless steel formed by rapid cooling (quenching).

Synonyms

• Non-magnetic stainless steel (descriptive synonym, though not all non-magnetic steels are austenitic).
• 300-series stainless steel (common commercial designation for the most prevalent group of austenitic steels).

Related Phrases / Compound Terms

• Austenitic structure: Refers specifically to the crystalline arrangement within the metal.
  • The alloying elements are crucial for maintaining the austenitic structure at room temperature.
• Austenitizing: (verb/gerund) The heat treatment process of heating steel to a temperature at which it transforms into austenite.
  • The austenitizing temperature must be carefully controlled before quenching.

Noun

1. steel that has enough nickel and chromium or manganese to retain austenite at atmospheric temperatures