Hardenability Calculator
Estimate the ideal critical diameter (DI) and critical section size for steel hardenability using Jominy end-quench approximation.
How to Use the Hardenability Calculator
- Enter the carbon content of the steel in percent.
- Enter the alloy multiplying factor (product of individual element factors; use 1.0 for plain carbon steel).
- Click Calculate to get the ideal diameter and estimated critical section sizes.
حالات الاستخدام
- •Selecting steel grades for through-hardened shafts and gears.
- •Predicting achievable hardness depth after quenching.
- •Comparing hardenability of different alloy steels.
الصيغة
DI_base ≈ 0.54 × √C (inches, grain size 7). DI = DI_base × alloy_factor. Critical diameter: D_oil ≈ 0.4 × DI, D_water ≈ 0.2 × DI.
الأسئلة الشائعة
What is hardenability?
Hardenability is the ability of steel to be hardened to a given depth by quenching. It is not the same as hardness — a highly hardenable steel can form martensite deep into a thick section.
What is the ideal diameter DI?
DI is the diameter of a steel bar that would harden to 50% martensite at the centre when quenched in a theoretically ideal (infinite severity) quench.
Is this calculator free?
Yes, all OhMyCalc calculators are completely free to use.