// multi-utility computation suite · offline · instant · precise
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sci.steel-hardenability-Jominy Calculator
Calculates the hardness at each Jominy end-quench distance from steel composition and plots the hardenability band. Hardenability band width reflects composition tolerances — alloy steels (4340, 4140) have wider hardenability bands than plain carbon steels, making their heat treatment more predictable.
Inputs
Carbon Pct
Reference formula or conversion factor shown for context.
Manganese Pct
Reference formula or conversion factor shown for context.
Chromium Pct
Reference formula or conversion factor shown for context.
Distance Mm
Separation between two points or total path length. Check that units are consistent throughout the calculation.
Results
estimated HRC at
The value at the specified point or condition.
surface HRC (J1.5)
Reference formula or conversion factor shown for context.
ideal critical diameter DI (mm)
The computed diameter -- twice the radius.
50% martensite hardening depth (mm)
The hard microstructure formed in steel by rapid quenching. Higher carbon content raises hardness but reduces toughness.
HRC = 60√C + 20 (approx)
Reference formula or conversion factor shown for context.