The stressstrain curves of all specimens are similar Figure 3 is a schematic diagram of the important features of each curve Each stressstrain curve has a diffuse upper yield strength, followed by a long region of yield point elongation, also called a Lüders strain In some specimens the structure of the strainC MECHANICAL PROPERTIES OF CARBON AND STAINLESS STEEL 364 Table C4 Stressstrain relationship for S235 carbon steel at elevated temperatures Strain Effective yield strength f y,T Steel temperature T a ºC 100 0 300 400 500 600 700 800 0000 0000 0000 0000 0000 0000 0000 000002, which is conventionally considered as an 'equivalent' yield stress, and the strain hardening exponent n The RambergOsgood model has been shown to be capable of accurately capturing the stressstrain curve up to σ 02, but can become inaccurate at higher strains, as demonstrated for stainless steels in 22 Stress Strain Curve What Exactly Is The Stress Strain Curve Stainless steel yield point stress strai...