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🔨 Brinell Hardness Number Calculator
Calculate Brinell hardness number and related material properties
📐 Brinell Hardness Formulas
BHN = 2F/(πD(D - √(D² - d²)))
d = √(D² - (D² - 2F/(π×BHN)))
F = (π×BHN×D(D - √(D² - d²)))/2
Indentation Depth = (D - √(D² - d²))/2
BHN = Brinell Hardness Number, F = applied force, D = ball diameter, d = indentation diameter
Brinell Hardness Number:
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Indentation Depth:
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Material Classification:
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Test Validity:
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💡 Tips & Information
- Standard test uses 10mm ball with 3000 kgf force
- Indentation diameter should be 2.5-6mm for valid results
- Higher BHN = harder material
- Used for metals, alloys, and some plastics
- Test force should be proportional to ball diameter