The material and hardness of fasteners have an important impact on their performance.

Here is a brief overview of these effects: Effects of materials:

Strength: The strength of the fastener material determines its tensile, compressive and other mechanical properties. High-strength materials such as alloy steel, stainless steel, etc. have high tensile strength and compressive strength, and are suitable for bearing large loads. Mild steel is suitable for ordinary occasions.

Corrosion resistance: Different materials have different resistance to corrosion, oxidation or other reactions. For example, stainless steel and titanium alloys have good corrosion resistance and are suitable for fasteners exposed to corrosive environments.

The effect of hardness:

Connection stability: The hardness of the fastener is related to its connection stability. The higher the hardness, the more difficult it is to change its shape by stretching or compression, thus improving the stability of the connection. However, if the hardness is too high, it may cause the fastener to increase brittleness and reduce its toughness.

Wear resistance: Hardness also affects the wear resistance of fasteners. The higher the hardness, the better the wear resistance, which can better resist friction and wear. However, too high a hardness can lead to stress concentration, increasing the risk of fracture.

In summary, when selecting fasteners, it is necessary to consider their material and hardness comprehensively to obtain the best performance. At the same time, for different application scenarios and needs, it is necessary to conduct reasonable material selection and hardness adjustment according to the actual situation.