When buying stainless steel tableware, you often see the words "304 stainless steel". Some businesses say "304 stainless steel is food grade stainless steel", and some say "316 stainless steel is better than 304 stainless steel", so what are these messy numbers?

The stainless steel grades used for tableware and kitchenware are 304, 316, 420, etc., because tableware does not require strong resistance to stress and corrosion, and the use temperature is not very high. For stainless steel materials, this is a very low temperature. , So the materials used are actually very cheap and commonly used.

Is 304 stainless steel the same as food grade 304 stainless steel? Different!

The same is true in the field of stainless steel. The grade determines the corrosion resistance of stainless steel. Whether it is food grade, in addition to the requirements for the corrosion resistance of stainless steel, there are also requirements for the precipitation indicators of five heavy metals of lead, chromium, nickel, cadmium, and arsenic.

Later, it was discovered that stainless steel that can meet the requirements of heavy metal precipitation and the requirements of the grade. Therefore, in the national standard GB9684-2011 "National Food Safety Standard Stainless Steel Products", the grade requirement is cancelled, and only heavy metal precipitates are required. Therefore, the stainless steel used in tableware today does not require grades, but at the same time, as long as it can meet the requirements of food Grade, it must be able to reach at least the level of 304 stainless steel.