What are the hardness grade of hexagon socket bolts?
The cylindrical head of the hexagon socket bolt is in the shape of hexagon socket. There are many kinds of hardness grades. Users can choose according to their different needs to ensure the tightening effect of the bolt.
The hardness grade of hexagon socket bolt will be different according to different materials and processing technology.
According to the simple strength, it can be divided into common type and high strength type. The general grade of common type is 4.8, and the hardness of high strength hexagon socket bolt is 8.8.
Generally, the material of high strength hexagon socket bolt is low carbon alloy steel or medium carbon steel, and the processing process is more, so quenching, tempering and other heat treatment are needed to strengthen the strength of the bolt.
If the hardness grade of hexagon socket bolts is different, then its price will be different. Generally, the price with high hardness is also high.
Of course, you can choose the grade of the hexagon socket bolts according to the purpose. If the ordinary grade of the bolt can meet the needs, there is no need to pay a high price to choose the high strength bolt.
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