Austenitizing Temperature Calculator

Determine recommended austenitizing temperature range by steel grade and carbon content using Fe-C phase diagram relationships

Input Parameters

Results

--
Ac3 / Dissolution Temp
°C
--
Recommended Low
°C
--
Recommended High
°C
--
Soak Time per 25mm
min
Note: Austenitizing must exceed Ac3 for full transformation. Too high = grain coarsening. Tool and stainless steels require higher temperatures for carbide dissolution.

Reference

Fe-C Phase Diagram Relationships: Hypoeutectoid (C < 0.76%): Ac3 ≈ 910 - 203×√C (°C) Hypereutectoid (C > 0.76%): Acm ≈ 727 + 371×(C - 0.76) Recommended austenitizing = Ac3 + 30°C to Ac3 + 80°C Soak time: ~30 min per 25mm section thickness