In general the yield strength of the materials range from 36000 to 75000psi.
The greater the tensile cold working, the lower the compressive yield strength.
Thus, the dislocations can move easily in the reverse direction and the yield strength of the metal is lower.
It may increase, decrease or leave unaffected the yield strength of the material.
At the same time, cold work increases gum metal's yield strength.
Not every area of the cross-section will have exceeded the yield strength.
The elastic range ends when the material reaches its yield strength.
For the vast majority of materials the yield strength decreases with increasing temperature.
For these materials, the yield strength shows little variation between room temperature and several hundreds degree Celsius.
However, as the normal force increases, eventually the stresses in the plate's surface will exceed its yield strength.