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The difference between high-strength bolts and ordinary bolts

Zoe 2024-08-16 10:11:49

1. The materials are different

The material of high-strength bolts is usually made of high-quality alloy steel, which has higher tensile strength and shear resistance. Ordinary bolts are mostly made of carbon steel and other materials.

2. Different intensities

High-strength bolts are stronger than regular bolts and can generally withstand greater tensile and shear forces. When the parts to be connected have high bearing pressure, it is recommended to use high-strength bolts.

3. The logo is different

When buying and using bolts, high-strength bolts and ordinary bolts can be distinguished by signs. Generally, high-strength bolts will be printed with logos and grades, such as 8.8, 10.9, 12.9, etc. Ordinary bolts, on the other hand, do not have a grade mark printed on them.

Second, the precautions for high-strength bolts

1. Choose the right grade

When using, the appropriate grade should be selected according to the required bearing capacity. If the grade is too low, the connection will loosen or break, and if the grade is too high, it will cause the connection material to break.

2. Attention should be paid to the order of installation

When installing high-strength bolts, they should be tightened correctly in a pre-defined order to avoid distortion or loosening. After preloading, positioning detection and angle adjustment are also required to ensure that the connection is exactly as required.

3. Be aware of the environmental impact

In the special working environment, high-strength bolts also need to pay attention to anti-corrosion, anti-rust and other problems, so as not to affect the service life of the connecting parts.

III. Summary

Although high-strength bolts and ordinary bolts have the same connection purpose, they should be distinguished according to actual needs and regulations when selecting and using. The advantage of high-strength bolts is their higher load-bearing capacity and shear resistance, but they are also more expensive than ordinary bolts. In the actual machining, it is necessary to choose according to the characteristics of different connecting parts to achieve the best results.