How to purchase hardware shrapnel scientifically?

Among the dazzling array of hardware materials, hardware shrapnel is a very common part, it is mainly used on switches, but we should pay attention to the following points when purchasing: 　　1, heat resistance due to the use of hardware shrapnel Since it has a higher temperature, attention should be paid to heat resistance in material selection.　　2, hardenability 　　 In order to ensure the quenching effect, the selected material should have good hardenability. 3. Corrosion resistance When used in a highly corrosive environment, the metal shrapnel will have different degrees of corrosion resistance due to the continuous process during the processing. For example, cold working, heat treatment, etc. will affect the corrosion resistance of the shrapnel to varying degrees .　　4. Fatigue strength　　 Generally, if the shrapnel that needs to be purchased needs to accept dynamic load, then its fatigue strength must be considered. In many cases, the fatigue strength has a great relationship with the material.　　5. Elastic limit 　　 The elastic limit of hardware shrapnel refers to the stress that corresponds to the force that does not deform after a certain force is applied to it to cause deformation, but this is more difficult to measure.　　 Have you mastered the scientific procurement method of hardware shrapnel? The article has been introduced here. I hope you have a better understanding of this small hardware material.