Gopalkrishna Advanced Rural Research Foundation
(Dr. APJ Abdul Kalam Research Zero Funding Initiative)
Indenter: Hardened Steel Ball (Dia: 10 mm)
HBW = $\frac{2P}{\pi D (D - \sqrt{D^2 - d^2})}$
Where $P$ = Load (kgf), $D$ = Ball diameter (10 mm), $d$ = Indentation diameter (mm).
Hardness Value: 0.0 HBW
| Trial | Material | Load (kgf) | Indentation Dia (d mm) | Hardness (HBW) |
|---|
Scale: Scale B (1/16" Ball) or Scale C (Diamond Cone)
Measures permanent depth increase of penetration under minor (10 kgf) and major loads. Direct digital readout.
HR = $N - \frac{h}{0.002}$
Hardness Value: 0.0 HR
| Trial | Material | Scale | Penetration Depth (mm) | Hardness Value |
|---|