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What is the classification of bolts according to the performance level?

Author : Avril Xu Source : BAIDU Release on : 2023-11-29 09:48:01

Bolts according to the performance level: 3.6, 4.8, 5.6, 6.8, 8.8, 9.8, 10.9, 12.9 eight grades, above 8.8 grade (including 8.8 grade) bolts made of low carbon alloy steel or medium carbon steel and heat treatment (quenching + tempering), commonly known as high-strength bolts, below 8.8 grade (excluding 8.8 grade) are commonly known as ordinary bolts.

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