1. Plasticity: plasticity refers to the ability of metal data to produce plastic deformation without destruction under load.
2. Hardness: Hardness is an indicator that weighs the soft and hard level of metal materials. At present, the method of determining hardness in consumption is the indentation hardness method, which uses a certain geometric indenter to press into the surface of the metal data to be tested under a certain load, and determines its hardness value according to the level of indentation.
3. Impact toughness: the load acting on the mechanical parts at a large speed is called impact load, and the metal can resist destruction under the action of impact load is called impact toughness.
4. Strength: Strength refers to the performance of metal data to resist destruction (excessive plastic deformation or fracture) under static load. Since the mode of action of the load is tensile, tightening, bending, shear, etc., the strength is also divided into tensile strength, compressive strength, bending strength, shear strength, etc. There is often a certain connection between various strengths, and tensile strength is often used as a super fundamental strength indicator in use.
5. Fatigue: The strength, plasticity and hardness discussed above are all indicators of the mechanical properties of metals under static load. In practice, many machine parts work under cyclic loads, and parts get tired under such conditions.
