Mechanical properties refer to the properties exhibited by metallic materials under external forces.

1. Strength: The ability of a material to resist deformation and fracture under external force (load). The unit area of the material is stressed by the load.

2, yield point (бs): said yield strength, refers to the material in the process of pulling, when the stress of the material reaches a certain critical value, the load no longer increases the deformation but continues to increase or generate 0.2% L stress value, the unit Newton/mm 2 (N/mm2) is indicated.

3. Tensile strength (σb), also called the strength limit, refers to the maximum stress value of the material before it is broken. The unit is expressed in Newtons/mm 2 (N/mm2).

4. Elongation (δ): The percentage of the total elongation to the length of the original gauge length after the tensile fracture of the material.

5. Section shrinkage (Ψ) The percentage of the material that shrinks after fracture, the maximum area of the section and the area of the original area.

6. Hardness: refers to the ability of the material to resist the surface of other harder materials. The commonly used hardness is determined by the range of hardness (HBS, HBW) and Rockwell hardness (HKA, HKB, HRC).

7. Impact toughness (Ak): The ability of the material to resist impact loads in joules/cm 2 (J/cm 2 ).