... completely reversed stresses using rotating beam-type machine and specimen.dAt 0.2% offset.eAverage of tension and compression moduli.Key: Temper designations: F, as cast; O, annealed; Hxx, strain ... andtempered materials for test purposes only and may not be suitable for some applications.Source: Machine Design, 1981 Materials Reference Issue, Penton/IPC, Cleveland, Ohio, Vol. 53, No. 6 (March 19, ... of carbon and alloy steel bars for the production of machine partsUltimate tensile strength, sutMinimum elongation (gauge lengthSteel designation MPa##kpsi MPa‡kpsi = 5.65ffiffiffiffiffiaÃp),...