| Alloys’ elements X | The electronegativity of X | The electronegativity of B | The differential value of elements electronegativity of X and B |
| W | 2.36 | 2.04 | 0.32 |
| Al | 1.61 | 2.04 | 0.43 |
| Cr | 1.66 | 2.04 | 0.38 |
| Co | 1.88 | 2.04 | 0.16 |
| Mo | 2.16 | 2.04 | 0.12 |