Physics

Brinell Hardness Number Calculator

Find the Brinell hardness number (BHN).

Applied load (kgf)

Ball diameter

Indentation diameter

Calculated Output

Brinell hardness (HB) 228.77

Formula: BHN = 2F ÷ (πD(D − √(D² − d²)))

Step-by-Step Breakdown

1. Values used:

2. Applied load = 3,000 kgf

3. Ball diameter = 10

4. Indentation diameter = 4

6. Brinell hardness = 228.77HB

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The math behind it

BHN = 2F ÷ (πD(D − √(D² − d²))). A smaller indentation means a harder material.

3000 kgf, 10 mm ball, 4 mm dent → about 229 HB.

Brinell vs Vickers?

Both measure hardness; Vickers uses a diamond pyramid and suits harder materials.