Brinell Hardness Number Calculator

Find the Brinell hardness number (BHN).

Applied load (kgf)

Ball diameter

Indentation diameter

Brinell hardness (HB) 228.77

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

Step-by-step with your numbers:

1. Values used:

2. Applied load = 3,000 kgf

3. Ball diameter = 10

4. Indentation diameter = 4

6. Brinell hardness = 228.77HB

Did we solve your problem today?

The Brinell test presses a hard ball into a surface and measures the dent.

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.