The composition of stainless steel is also different. Experts suggest that when you buy stainless steel cutlery with a small magnet, the stainless steel that can be sucked up by the magnet contains more chromium. Chromium is a metal that is harmful to the human body. Stainless steel that cannot be sucked up not only contains chromium but also contains nickel. Chrome and nickel alloys are relatively stable, not easily precipitated, and have better corrosion resistance. The stainless steel that can be sucked up can only resist rust, can't be antiseptic, easily be corroded by acid and alkali, should not contain the food or condiment containing acid and alkali.