Inner hexagonal cylindrical head shoulder screw, standard type

Frequently asked questions about this product

1. Why are stainless steel screws magnetic?

During the cold working process, the material changes part of the austenite structure characteristics due to stress, turning into martensite and ferrite. As the deformation increases, the magnetism increases, so the product will have weak magnetism, and the magnetism varies with the deformation of the product.

2. What is the maximum operating temperature of stainless steel screws?

According to the GB/T 3098.6-2014 standard, stainless steel 304 and 316 products do not affect tensile strength within 100°C, but after exceeding 100°C, the tensile strength decreases by 5% for every 100°C increase, and it is not recommended to use after exceeding 400°C.

3. How to prevent screws from rusting?
If there is a requirement for rust prevention, please give priority to SUS304 material, or choose products with galvanized, nickel-plated (salt spray for at least 24H), Dacromet-plated, black Dacromet-plated (salt spray for at least 400H), chrome-plated, and black stainless steel.
Carbon steel blackened products need to be regularly smeared with anti-rust oil for maintenance to extend the anti-rust time.

4. What are the main materials and grades of screws currently on sale?

The main materials are stainless steel, carbon steel, resin, aluminum alloy, titanium alloy, ceramic, Hastelloy, etc.
The main strength grades of stainless steel are A2-70, A4-70, A4-80
The main strength grades of carbon steel are 8.8, 10.9, 12.9