Is it scientific to use magnets to identify the material of stainless steel kitchenware?

Stainless steel refers to steel that is resistant to weak corrosive media such as air, steam, and water, and chemically corrosive media such as acid, alkali, and salt (also known as stainless acid-resistant steel in the industry). The addition of chromium (Cr), nickel (Ni), manganese (Mn), silicon (Si), titanium (Ti), molybdenum (Mo) and other alloying elements in the smelting process improves the performance of the steel and makes the steel corrosion resistant. (That is, no rust) is what we often call stainless steel. Stainless steel is a kind of steel that is not easy to rust. Some of the stainless steel has both rust resistance and acid resistance (corrosion resistance). The rust resistance and corrosion resistance of stainless steel are due to the formation of a chromium-rich oxide film (passivation film) on its surface. This kind of rust resistance and corrosion resistance are relative. All stainless steel must contain more than 12% chromium, otherwise it cannot be called stainless steel.

At present, most of the stainless steel products on the market do not explain the content of nickel and chromium. How do consumers distinguish between high-quality and low-quality stainless steel products? In this regard, many netizens and some so-called "brickers" have made suggestions: use magnets to absorb stainless steel Material, verify its pros and cons and authenticity. Products that cannot be absorbed are considered to be good and genuine; those that can be absorbed are magnetic and considered to be counterfeit products. So is this method correct?

In fact, there is another kind of stainless steel magnet that cannot be attracted. That is stainless steel with high manganese content and less nickel or no nickel. But this steel will be much cheaper than austenitic steel. Except for these two types of stainless steel, the other stainless steels are attracted by magnets. Because of the low thermal conductivity of austenitic stainless steel, it is inappropriate to use it as a kettle, wok, and rice cooker. It will waste energy and extend the time to boil water for cooking. Using ferritic stainless steel to make woks and rice pots not only has excellent corrosion resistance, but also its thermal conductivity is nearly half higher than that of austenitic stainless steel. But this kind of stainless steel is sucked, you can go back and try it.

In this way, we can conclude that there are many types of stainless steel, but only two are not attracted by magnets. One is austenitic stainless steel that is mostly used as a decorative material, and the other is a stainless steel with high manganese content. Other stainless steels such as classified ferrite and martensite are attracted by the magnet. Therefore, it is unscientific to use magnets to identify whether it is stainless steel! Jiangmen Yingxin Metal Products Co., Ltd. specializes in the production of various hardware kitchen utensils, such as stainless steel cookware, stainless steel pots, stainless steel tableware and so on. Look forward to working with you!

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