Bolt marking, performance class

Date:2022-08-30 Click:319

Bolt marking, performance class:
The logo. Hexagon head bolts and screws (thread diameter ≥ 5mm). Embossed or debossed logo on the top of the head, or a debossed logo on the side of the head. Including performance level, factory standard. Carbon steel: The strength grade marking code consists of two parts of numbers separated by "·". The meaning of the number part before the "·" in the marking code represents the nominal tensile strength, for example, "4" in grade 4.8 represents 1/100 of the nominal tensile strength of 400N/MM2. The meaning of the "·" and the number after the point in the marking code represents the yield-to-strength ratio, that is, the ratio of the nominal yield point or the nominal yield strength to the nominal tensile strength. For example, the yield point of grade 4.8 product is 32.

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