Will stainless steel be attracted by magnets?

Feb 09, 2023 Leave a message

Some can be attracted by magnets, and some are not easily or not attracted by magnets. 1. What does a magnet attract? Magnets attract ferromagnetic objects. See the attached table for common ferromagnetic objects. Whether it can be attracted by a magnet essentially depends on the content of ferromagnetic substances in the object. If the content is large, it will be attracted, and if the content is small, it will not be easy to live and cannot be attracted by the magnet. 2. What is in stainless steel? Stainless steel is divided into three categories: austenitic stainless steel, ferritic stainless steel and martensitic stainless steel. Austenitic stainless steels contain 16%-26% chromium and up to 35% nickel, generally have the highest corrosion resistance, cannot be strengthened by heat treatment, and are nonmagnetic; the most common type is 18/8, or grade 304, That is, it contains 18% chromium and 8% nickel; typical uses include the aircraft industry, dairy and food processing industries. Standard ferritic stainless steel contains 10.5%-27% chromium, but does not contain nickel. Due to the low carbon content (less than 0.2%), it cannot be strengthened by heat treatment. It is only used in occasions where corrosion resistance is not high, such as construction and automobiles In terms of decoration. Martensitic stainless steel usually contains 11.5%-18% chromium and less than 1.2% carbon, sometimes nickel, can be strengthened by heat treatment, has moderate corrosion resistance, and is used for knives, surgical instruments, wrenches and turbines. Stainless steel is a mixed object (alloy), not a pure single substance. Austenitic stainless steel due to the addition of higher chromium and nickel in the steel, the internal structure of the steel presents a structure state called austenite, which has no magnetic permeability and cannot be attracted by magnets. Ferritic stainless steel and martensitic stainless steel are ferromagnetic. That is to say, the content of ferromagnetic substances in austenitic stainless steel is low, so it is not easy or cannot be attracted by magnets; while the content of ferromagnetic substances in ferritic stainless steel and martensitic stainless steel is relatively high, they can usually be attracted by magnets.