Xiao Bian today to tell you about the use of circular nails and wall fixed firmly in the mounted on the wall, the wall cloth construction points:
Mechanical properties of metal materials is the role of the external force shown by the characteristics.
1. Strength: Material in the external (load) under the action, resistance to deformation and fracture ability. The unit area of the material is called the stress by the load.
2. Yield point (бs): said yield strength, refers to the material in the stretch process, the material suffered a stress reaches a critical value, the load is no longer increase the deformation but continue to increase or produce 0.2% L. When the stress value, the unit with Newton / mm2 (N / mm2) said.
3. Tensile strength (бb), also called strength limit, means that the material is subjected to maximum stress before breaking. The units are expressed in N / mm2 (N / mm2).
4. Elongation (δ): Percentage of the total elongation to the original gauge length after tensile fracture.
5. Sectional shrinkage (Ψ) The percentage of the maximum area of the cross section and the original cross-sectional area after tensile fracture.
6. Hardness: It refers to the ability of the material to resist the pressure of other hard objects. Hardness is used to measure the hardness (HBS, HBW) and Rockwell hardness (HKA, HKB, HRC).
7. Impact toughness (Ak): The ability of a material to resist impact loading in Joules / cm2 (J / cm2).