ɔːltˈɜːnətˌɪvli, ɪf ðə jˈiːld stɹˈɛs, , ɪz ɐsˈuːmd təbi æt ðə zˈiəɹoʊ.tˈuː pɚsˈɛnt ˈɔfsɛt stɹˈeɪn, ðə fˈɑːloʊɪŋ ɹᵻlˈeɪʃənʃˌɪp kæn biː dᵻɹˈaɪvd.
Alternatively, if the yield stress, , is assumed to be at the 0.2% offset strain, the following relationship can be derived.