The mechanical properties of metal fasteners are key indicators of their quality and reliability, mainly including the following aspects:
Tensile strength:
Tensile strength refers to the maximum tensile force that a fastener can withstand when subjected to tensile load. This indicator directly reflects the load-bearing capacity of the fastener under tensile stress. For example, in aerospace and automotive manufacturing, fasteners with high tensile strength can ensure that the structure will not break when subjected to tension.
Yield strength:
Yield strength is the stress value at which the fastener begins to undergo plastic deformation when subjected to tensile or compressive loads. It marks the turning point when the material enters the plastic state from the elastic state. The level of yield strength affects the stability and safety of the fastener under continuous load.
Elastic modulus:
Elastic modulus is a physical quantity that describes the proportional relationship between stress and strain in the elastic deformation stage of a material. For fasteners, the larger the elastic modulus, the smaller the deformation under the same stress, that is, the material has a higher stiffness.
Fatigue strength:
Fatigue strength is the ability of a fastener to resist fatigue damage under alternating loads. During long-term use, fasteners may be subjected to repeated loads, so fatigue strength is an important indicator for evaluating their long-term reliability.
Creep performance:
Creep performance is the slow plastic deformation of fasteners when they are subjected to constant loads for a long time in a high-temperature environment. In a high-temperature working environment, creep performance is crucial for evaluating the performance and life of fasteners.
Impact toughness:
Impact toughness reflects the ability of fasteners to resist fracture when subjected to impact loads. In sudden situations, such as collisions or vibrations, impact toughness ensures that fasteners will not fail due to impact.
Hardness:
Hardness is a performance indicator that measures the hardness and softness of metal materials. For fasteners, hardness not only affects their wear resistance, but is also related to their ability to withstand loads.
In summary, the mechanical performance indicators of Metal fasteners cover tensile strength, yield strength, elastic modulus, fatigue strength, creep performance, impact toughness and hardness, etc. These indicators together determine the performance and reliability of fasteners in practical applications.
