1.Stainless steel screws are a family of iron alloys, each with a chromium content of more than 12%. Chromium is an anti-corrosion component, so all stainless steels have strong corrosion resistance. In general, the higher the chromium content, the better the corrosion resistance.
2. The use of nickel elements in stainless steel screws used to rely on the use of nickel elements in the process of using stainless steel as the material. However, with the global price increase of nickel elements, the price of fasteners has also been greatly affected. Influence. In order to reduce cost pressure and improve the competitiveness of fasteners, fastener manufacturers have especially looked for alternative materials and produced low-nickel stainless steel fasteners.
3. If stainless steel is used as the main material for fasteners in stainless steel screws, it is necessary to understand the magnetic properties of stainless steel itself. Stainless steel is generally considered to be non-magnetic, but in fact, austenite series materials may appear to be magnetic to a certain extent after a certain processing process, but if it is considered that magnetic is the standard for judging the quality of stainless steel fasteners correct.
4. All stainless steels contain carbon in addition to iron and chromium. But the carbon content is low and carefully controlled. The reason is that carbon can combine with chromium to form carbides, so that the role of chromium in the formation of corrosion resistance becomes very small. Therefore, in order to achieve the effect of anti-corrosion, when the carbon content increases, the chromium content should be increased accordingly.