This standard specifies the conditions for the axial constant amplitude force controlled fatigue test of metallic material specimens (without stress concentration introduced) at room temperature. Provide the relationship between applied stress and failure cycle cycles for a given material under different stress ratios.

This standard applies to the axial force control fatigue test of circular and rectangular cross-section specimens. The testing of product components and other special-shaped specimens is not included.

Note: Since the shape and size of notched specimens are not standardized, this standard does not include fatigue testing of notched specimens. However, the fatigue test process described in this standard can be applied to the fatigue test of notched specimens.