How to explain the difference between yield strength and tensile strength

More and more objects need to be tested before they can be used, which is obviousTension testerThe performance is very powerful, used in various fields, and can perform a variety of experiments, but people often confuse the tensile strength and yield strength of tensile testing machines. The following are the differences between the two listed by Jinan Hengsi Shanda Instrument Co., Ltd.:

1,tensile strength

When the steel yields to a certain level, due to the rearrangement of the internal grains, it can only make progress again against deformation. Although the deformation develops very quickly, it can only improve with the progress of stress until the stress reaches the value. Afterwards, the ability of steel to resist deformation is significantly reduced, and large plastic deformation occurs in thin places. The cross-section of the specimen here decreases rapidly, showing necking until it breaks and is damaged. The stress value before steel is tensile and fractured is called the strength limit or tensile strength.

2, yield strength

When the stress exceeds the elastic limit, the deformation increases rapidly. In addition to elastic deformation, local plastic deformation also occurs. When the stress reachesBAfter the point, the plastic contingency increases sharply and the curve presents a small shaken platform. This phenomenon is called surrender. The small stresses at this stage are called the upper yield point and the lower yield point respectively. Since the value of the lower yield point is relatively stable, it is used as an indicator of data resistance, which is called the yield point or yield strength.

MoreTension testerTechnical information is available in Jinan Hengsi Shanda Instrument Co., Ltd.