The thermal conductivity of cast iron is 80, which is five times that of stainless steel. The specific heat is 0.46 and the density is 7.8. Cast iron is very suitable for stews, teppanyaki and other utensils that need long-term heat preservation because of its high density, the largest specific heat per unit volume of metal (that is, the temperature rises slowly and the temperature drops slowly) and the uniform and rapid heating. For example, the world-famous French Le Creuset and Staub cast iron pots cost two or three thousand yuan each.

Of course, you don't have to buy these big names to make teppanyaki, as long as it is cast iron. Steel is worse, stainless steel is the worst.

I really don't know where to sell it. You can go to some foundries for customization, or go to Taobao to see.