According to the inquiry, 304 is a common stainless steel, containing more than 8% chromium/kloc-0 and more than 8% nickel. Many kettles and filter tea ware are made of this material. The density of 304 stainless steel is 7.93g/cm3, which can withstand the high temperature of 800℃. As a food-grade stainless steel, it is widely used in food and medical industries.

Adding Mo () to 3 16 stainless steel greatly improves its corrosion resistance and high temperature resistance compared with 304 stainless steel. It can withstand the high temperature of 1200- 1300℃, and is mainly used in food industry and surgical instruments. Another advantage of 3 16 stainless steel is that it expands when heated and contracts when cooled.

Generally speaking, 304 and 3 16 belong to food-grade stainless steel, which is safe to be used as a health pot, but 3 16 stainless steel has better corrosion resistance and high temperature resistance than 304 stainless steel, so 3 16 stainless steel is better.