Compute Vickers hardness HV = 1.854·F/d² from indentation diagonal d and test force F (converted to kgf).
维氏硬度由压痕对角线长度与试验力求得（F 换算为 kgf）。
| Item | Formula / Note | Source / Standard |
|---|---|---|
| Vickers hardness | HV = 1.854 · F / d^2, with F in kgf and d the mean diagonal in mm | ISO 6507-1:2018, Metallic materials - Vickers hardness test - Part 1: Test method |
| Indenter geometry | The indenter is a diamond pyramid with a 136° angle between opposite faces | ISO 6507-1:2018, Metallic materials - Vickers hardness test - Part 1 |
| Origin of the constant | The constant 1.854 follows from the indenter geometry and unit conversion via 2·sin(136°/2) | ISO 6507-1:2018, Metallic materials - Vickers hardness test |
| Test force range | Vickers covers a wide force range from micro to conventional hardness | ISO 6507-1:2018, Metallic materials - Vickers hardness test - Part 1 |