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Hexagon bolt grade performance

- Dec 17, 2018 -

The hexagonal bolt performance grade label consists of two parts, which represent the nominal tensile strength and yield ratio of the bolt material.

For example, a bolt with a performance rating of 4.6 means:

A, the bolt material has a nominal tensile strength of 400 MPa;

B, the yield ratio of the bolt material is 0.6;

C, the nominal yield strength of the bolt material is 400×0.6 = 240MPa

Performance grade 10.9 high strength bolts, after heat treatment, can achieve:

A, the bolt material has a nominal tensile strength of 1000 MPa or higher;

B, the nominal yield strength of the bolt material is about 1000×0.9 = 900MPa.


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