SS400 steel sample tensile

SS400 steel sample tensile: during the tensile process of the SS400 steel sample, the material passes through the yield stage and enters the strengthening stage. After the transverse section size is significantly reduced, the maximum force (Fb) that it bears when it is broken, divided by the original cross-section of the sample. The stress (σ) resulting from the area (So) is called the tensile strength or the strength limit (σb), and the unit is Nmm2 (MPa).

It represents the maximum ability of a metal material to resist damage under tensile force. When the yield reaches a certain level, due to the rearrangement of the internal grains, the ability to resist deformation increases again. Although the deformation develops rapidly at this time, it can only increase with the increase of the stress until the stress reaches the maximum value. After that, the ability of the SS400 steel to resist deformation was significantly reduced, and at the weakest point, the section of the test piece rapidly shrank, and the necking phenomenon occurred until the fracture failure occurred. The maximum stress value of SS400 steel before fracture is called the ultimate strength or tensile strength.