Stainless steel standard parts on the production of raw materials have their own requirements. Most stainless steel materials can be made of steel wire or bar for fastener production, austenitic stainless steel, ferrite stainless steel, martensitic stainless steel, precipitation hardened stainless steel. So what is the principle of selection? The choice of stainless steel material mainly from the following aspects to consider:

1, the fastener material in the mechanical properties, especially the strength requirements;

2, working conditions on the corrosion resistance of materials on the requirements;

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

4, the production process on the material processing performance requirements;

5, other aspects, such as weight, price, procurement factors should be considered.

Through the five aspects of a comprehensive, comprehensive consideration, the final selection of the relevant national standards for the application of stainless steel. 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).