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sci.austenite-martensite-Ms-Andrews Calculator
Calculates martensite start temperature Ms using the Andrews or Bhadeshia empirical equation from steel composition in wt%: Ms = 561 − 474C − 33Mn − 17Ni − 17Cr − 21Mo (Andrews). Steels with Ms below room temperature can retain austenite in the final microstructure, used to control dimensions in precision components.
Inputs
C Pct
Reference formula or conversion factor shown for context.
Mn Pct
Reference formula or conversion factor shown for context.
Si Pct
Reference formula or conversion factor shown for context.
Cr Pct
Reference formula or conversion factor shown for context.
Mo Pct
Reference formula or conversion factor shown for context.
Ni Pct
Reference formula or conversion factor shown for context.
Results
martensite start Ms (°C)
The hard microstructure formed in steel by rapid quenching. Higher carbon content raises hardness but reduces toughness.
martensite finish Mf (°C)
The hard microstructure formed in steel by rapid quenching. Higher carbon content raises hardness but reduces toughness.