Stainless steel standard parts have their own requirements for production raw materials. Most stainless steel materials can be made into wire or bar for fastener production, including austenitic stainless steel, ferritic stainless steel, martensitic stainless steel, and precipitation hardening stainless steel. So what are the principles when selecting materials? The selection of stainless steel materials is mainly considered from the following aspects:

1. Requirements for fastener materials in terms of mechanical properties, especially strength;

2. The requirements of working conditions on the corrosion resistance of materials;

3. The requirements of the working temperature on the heat resistance (high temperature strength, oxidation resistance) of the material;

4. Requirements for material processing performance in terms of production technology;

5. Other aspects, such as weight, price, and purchasing factors should be considered.

After comprehensive and comprehensive consideration of these five aspects, the applicable stainless steel materials are selected according to the relevant national standards. The standard parts and fasteners produced should also meet the technical requirements: bolts, screws and studs (3098.3-2000), nuts (3098.15-2000), set screws (3098.16-2000).