| Description | Symbol |
| alternating, or amplitude strength | Sa |
| amplitude stress | σa |
| Brinell hardness | HB |
| compressive strength | Sc |
| design factor | nd |
| elongation | δ |
| endurance limit, rotary-beam test specimen | S'e |
| endurance limit, at crit. loc. of mach part (or fatigue limit) | Se |
| fatigue limit | σN |
| fracture load | Pf |
| fracture strength, or fatigue strength | Sf |
| mean stress | σm |
| midrange, or mean strength | Sm |
| modification factor, load | kc |
| modification factor, miscellaneous effects | kf |
| modification factor, reliability | ke |
| modification factor, size | kb |
| modification factor, surface condition | ka |
| modification factor, temperature | kd |
| modulus of rigidity | G |
| normal strain | ∈ |
| normal stress | σ |
| Poisson's ratio | ν |
| range of stress | σr |
| Rockwell B hardness | RB |
| Rockwell C hardness | RC |
| safety factor | n |
| shear strain | γ |
| shear stress | τ |
| stress concentration factor (normal stresses) | Kt |
| stress concentration factor (shear stresses) | Kts |
| stress concentration factor, fatigue | Kf |
| stress concentration factor, shear | Ks |
| tensile strength | St |
| torsional yield strength | Ssy |
| true fracture stress | σf |
| true ultimate stress | σu |
| ultimate compressive strength, or compressive strength | Suc |
| ultimate strength (can also be ultimate tensile strength) | Su |
| ultimate tensile strength, or tensile strength | Sut |
| yield compressive strength | Syc |
| yield strength | Sy |
| yield tensile strength | Syt |
| Young's modulus | E |