S-N curve represents the:
1
Fatigue strength (on y-axis) and numbers of fully reversed stress cycle (on x-axis)
2
Hardness (on y-axis) and numbers of fully reversed stress cycle (on x-axis)
3
Fracture toughness (on y-axis) and numbers of fully reversed stress cycle (on x-axis)
4
Resilience (on y-axis) and numbers of fully reversed stress cycle (on x-axis)
5
Fatigue strength (on x-axis) and numbers of fully reversed stress cycle (on y-axis)