Austenite (Gamma-Iron Phase)
Engineering definition, metallurgical mechanisms, standard testing specifications, and manufacturing guidelines for closed-die forgings up to 50 kg.
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The face-centered cubic (FCC) solid solution of carbon in gamma-iron, stable in unalloyed steels between 912°C and 1394°C, and stabilized at room temperature in 300-series stainless steels.
Technical Explanation & Metallurgical Principles
Austenite possesses a face-centered cubic (FCC) crystal structure that permits high solubility of interstitial carbon (up to 2.14%). In carbon steels, austenite is the parent phase that transforms into pearlite, bainite, or martensite upon cooling. In austenitic stainless steels (304, 316), high Nickel additions stabilize austenite down to cryogenic temperatures, granting unmatched ductility.
Key Engineering Specifications & Parameters
| Technical Parameter / Metric | Engineering Benchmark / Value |
|---|---|
| Crystal Lattice | Face-Centered Cubic (FCC) |
| Magnetic Property | Non-magnetic in stable condition |
| Max Carbon Solubility | 2.14% at 1148°C |
Application at Jayesh Forge (Rajkot Plant)
Carefully controlled in our heat treat furnaces to ensure complete austenitization before quenching of carbon and alloy forgings.
Related Materials, Standards & Products
Engineered Product Lines
Related Metallurgical & Testing Terms
Austenitizing
Heating a ferrous alloy above its upper critical transformation temperature (Ac3 or Acm) to transform the entire microstructure into uniform austenite.
Martensite Microstructure
A super-hard, metastable, body-centered tetragonal (BCT) crystalline phase formed by the rapid diffusionless shear transformation of austenite during quenching.
Ferrite (Alpha-Iron Phase)
The body-centered cubic (BCC) crystalline form of iron, stable at room temperature in unalloyed steels, exhibiting magnetic behavior and low carbon solubility.
Sigma Phase Embrittlement (σ-Phase)
An extremely hard, brittle intermetallic Fe-Cr-Mo phase that precipitates in duplex and high-chromium stainless steels between 600°C and 900°C, destroying impact toughness.
Questions Regarding Austenite (Gamma-Iron Phase)
The face-centered cubic arrangement of iron and nickel atoms cancels out permanent electron spin magnetic dipoles, rendering austenitic alloys non-ferromagnetic at ambient temperature.
Request a Forging Quote with Austenite (Gamma-Iron Phase) Compliance
Our Rajkot metallurgy desk is ready to review your technical drawings, testing protocols, and delivery schedules for custom closed-die forgings strictly up to 50 kg.