| a | Crack length |
| A | Strain |
| BM | Base metal |
| C | Paris law coefficient |
| CGHAZ | Coarse-grained heat affected zone |
| F | Force |
| FCG | Fatigue crack growth |
| FEM | Finite element method |
| FGHAZ | Fine-grained heat affected zone |
| HAZ | Heat affected zone |
| HSLA | High-strength low-alloyed steel |
| J | J integral |
| ΔK | Stress intensity factor range |
| LSC | Large surface crack |
| m | Paris law exponent |
| N | Number of cycles |
| Rm | Tensile strength |
| Rp0.2 | Conventional yield stress |
| SAW | Submerged arc welding |
| SIF | Stress intensity factor |
| SMAW | Shielded manual arc welding |
| SSC | small surface crack |
| WJ | Welded joint |
| WM | Weld metal |
| XFEM | Extended finite element method |
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