The evaluation of yield stress -σS is frequently encounter in material testing. In this method there is necessity of manufacture of test-tube from tested material or detail and made tension test. There is destructive method. For many details there is not acceptable. In material testing there is interest to non-destructive evaluation of yield stress σS for the materials and details. In this paper is lock at possibility for non-destructive evaluation of yield stress σS by means measure Brinel’s hardness – HB or velocities of propagation of longitudinal and transversal ultrasonic waves – VL and VT in tested materials and details.