What is the tensile strength of the allen head self tapping screws?

The tensile strength of the allen head self tapping screws depends on what material the screw is made of and whether it has been hardened by heat treated after the screw is manufactured, and the grade of the hard heat treatment is determined. Shi Shi Tong can customize the production of 4.8 6.8, 8.8, 10.9, 12.9, high strength allen self-tapping screws according to the different needs of customers.

The strength grade of stainless steel allen head self tapping screws is 4.8 grade, and the definition of 4.8 is as follows: 4 stands for tensile strength of 400 Mpa,and yield strength of 400× 0.8=320Mpa. 304 stainless steel is a kind of material which can not be hardened by heat treated, so its strength grade can not meet the higher requirements, but its anticorrosion performance is much stronger than that of carbon steel.

Carbon steel can be hardened to 4.8, 6.8, 8.8, 10.9, 12.9, etc., which can not represent different tensile strength and yield strength. For example, the tensile strength of 8.8 grade allen head self tapping screws are 800Mpa, and the yield strength is 800×0.8 = 640Mpa. The tensile strength of theallen head self tapping screws in Grade , it mean it’s tensile strength is 100 Mpa, and the yield strength is 1000×0.9 = 900Mpa.

If you want to custom allen head self tapping screws, please feel free to contact us at annie.li@szsst88.com

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