| σi | true stress |
| εi | true strain |
| A 0 | initial cross-sectional area |
| Ai | instantaneous cross-sectional area |
| Pi | instantaneous tensile load |
| AISI | American Iron and Steel Institute |
| ASTM | American Society for Testing and Materials |
| CCD | charge coupled device |
| CT | Heat treated followed by cryogenic treated specimen |
| DCT | deep cryogenic treatment |
| GTAW | gas tungsten arc welding |
| DIC | Digital Image Correlation |
| HAZ | heat affected zone |
| BM | Base metal |
| HT | heat treated specimen |
| UT | Untreated specimen |
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