What is Proof Stress?

Proof Stress and Proof Resilience

Proof Stress In some ductile materials such as Aluminium, Copper, Mild Steel, the yield point cannot be clearly defined during tension test, therefore yield stress is Unknown. For such metals design stress called PROOF stress is calculated using offset method. An offset of strain equal to given permissible plastic strain, eg at 0.2% for Al, … Read more What is Proof Stress?