Question

Yield strength (Sy) is typically defined as the point on the stress–strain curve with a strain of during a tension test. a) 0.1% b) 0.2% c) 0.3% c) 0.4%

Answer 1

Answer:

The correct answer is option 'b': 0.2%

Explanation:

The yield strength of a material is defined as the stress in the material when the material begin's to undergo plastic deformation which is also known as  yielding.

For materials with well defined yield point such as steel of grade Fe-250 the yield strength can be properly identified from the stress strain curve. But for high strength steel such as Fe-415, Fe-500 the yield point is not properly identified hence the yield strength is taken at 0.2% of proof strain.