1. Name
Yield strength
2, the corresponding data
When the stress exceeds the elastic limit, the deformation increased rapidly, this time in addition is elastically deformed outside, further generating portion is plastically deformed. When the stress reaches point B, plastic strain increases sharply, the curve appears a little fluctuation platform, a phenomenon known as the yield. Maximum, minimum stress at this stage are referred to as the yield point and the yield point. Since the value of the yield point is more stable, and therefore it is the material resistance as an index, called the yield point or yield strength.
Some steels (e.g., high carbon steel) yield no obvious phenomenon, usually plastic deformation stress (0.2%) of the trace occurs as the yield strength of the steel, the yield strength of the conditions referred to.