The use of stainless steel as a material for fasteners can be said to have significant advantages in various aspects of manufacturing, use, or treatment. Therefore, although stainless steel as a material for fasteners itself has higher costs and relatively short cycle life, it still belongs to a relatively cost-effective solution for fasteners.
Magnetic issues with stainless steel fasteners
If stainless steel is used as the main material for fasteners, it is also important to understand the magnetic properties of the stainless steel itself. Stainless steel is generally considered non magnetic, but in reality, austenitic series materials may exhibit certain magnetism after certain processing techniques. However, it is inaccurate to assume that magnetism is the standard for judging the quality of stainless steel fasteners.
When selecting fasteners, whether the stainless steel material has magnetism does not indicate its quality. In fact, some chromium manganese stainless steels are non magnetic stainless steels. Chromium manganese stainless steel cannot replace the use of 300 series stainless steel in stainless steel fasteners, especially in high medium corrosive working environments.
Use of nickel element in fasteners
In the process of using stainless steel as the material for fasteners, they used to rely more on the use of nickel element. However, with the global price increase of nickel element, the price of fasteners has also been greatly affected. In order to alleviate cost pressure and improve the competitiveness of fasteners, fastener manufacturers have specifically sought alternative materials and produced low nickel stainless steel fasteners.
1. Standards for fastener product dimensions: specify the basic dimensions of the product; Products with threads also include basic dimensions of threads, thread ending, shoulder distance, undercut and chamfer, and end dimensions of external threaded parts.
2. Standards for the technical conditions of fastener products. This mainly includes standards and corresponding specific regulations related to product tolerances, mechanical properties, surface defects, surface treatment, product testing.
3. Standards for acceptance inspection, marking, and packaging of screw products: specify the qualified quality level and sampling plan of random inspection items during product factory acceptance, as well as the content of product marking methods and packaging requirements.
4. Standard marking methods for standard parts, fasteners, screws, and screws: specify the complete marking methods and simplified marking methods for the product.
5. Standards for other aspects of fasteners: such as standards for fastener terminology, standards for fastener product weight, etc.