Brinell Hardness Number Calculator
Free calculate brinell hardness number (bhn) from indentation diameter, applied load, and ball diameter.
Input Parameters
Standard: 3000 kgf for steel
Standard: 10 mm
Average of two perpendicular measurements
Results
Enter parameters to calculate Brinell hardness
Brinell Hardness Formula
Formula
BHN = 2P / (πD(D - √(D² - d²)))
Where P is load, D is ball diameter, d is indentation diameter
Typical Values
- • Soft aluminum: 15-25 BHN
- • Mild steel: 120-150 BHN
- • Hardened steel: 400-600 BHN
- • Hardened tool steel: 600-800 BHN