Qualified 304 steel material is harmless to human body, but it is not suitable for long-term contact with acid and alkali substances; Unqualified stainless steel pot is harmful to human body.

304 stainless steel is a general stainless steel material, and its rust prevention ability is stronger than that of 200 series stainless steel material. High temperature resistance is also good, up to 1000- 1200 degrees.

Yi Zhu, an associate professor at the College of Food Science and Nutritional Engineering of China Agricultural University, said that stainless steel contains a certain proportion of chromium and nickel. Only the chromium content above 12.5% can be called stainless steel, while the stainless steel with chromium content of 18% and nickel content of 8%, that is, "18-8" (304 steel), can have the corrosion resistance and rust resistance of stainless steel utensils.

Extended data:

For 304 stainless steel, Ni element in its composition is very important, which directly determines the corrosion resistance and value of 304 stainless steel.

The most important elements in 304 are Ni and Cr, but they are not limited to these two elements. Specific requirements are stipulated by product standards. It is generally judged in the industry that as long as the Ni content is more than 8% and the Cr content is more than 18%, it can be considered as 304 stainless steel. This is why this kind of stainless steel is called 18/8 stainless steel in the industry. In fact, the relevant product standards have very clear regulations on 304, and these product standards have some differences for different shapes of stainless steel. The following are some common product standards and tests.

Baidu Baike -304 Stainless Steel