The mechanical properties of steel include three indexes of elongation test; Namely yield point, elongation and tensile strength. And impact test index; Impact work. Their impact on the project is as follows:

1, yield point, σ, in MPa, indicates the degree of bending that the material can bear under the action of external force, that is, bending strength, which is an important mechanical index of plastic materials (such as steel).

2. The elongation δ% directly measures the plasticity of the material.

3. Tensile strength σb, in MPa, refers to the degree to which the material bears tensile force.

4, impact work j, said the material's ability to withstand impact.