Is the steel-aluminum-steel composite bottom pot healthy?

The heat conducting part in the middle should be pure aluminum. Usually when stainless steel is welded with stainless steel, it can also be welded with aluminum. As for the different expansion coefficients of the two materials, first look at the state and temperature. Pots are usually used to cook rice or soup, so there must be water, so the temperature is a little more than 100 degrees ... and the temperature is gradually rising unless the pot burns red quickly at high temperature. Throw it in cold water ... the domestic heat source can't reach high temperature and can be ignored. Compared with the pot with the same thickness, the excellent thermal conductivity of composite steel pot is better than that of alloy aluminum pot pot and composite bottom stainless steel pot. It is also a revolution in the history of pot, and the economic level of our country is gradually improving. I believe that the pot in our kitchen will be replaced by composite steel pot in two years!