Because the reaction kettle is made of stainless steel or carbon steel, enameled reaction kettle is a track-containing enamel through high-temperature baking, the formation of dense enamel on the metal surface.
The material of the reaction kettle has SUS340 stainless steel, corrosion resistance is better, generally speaking, with this material. Secondly, there is SUS321 stainless steel, this stainless steel less do. There is SUS316L stainless steel, this is better than 304 stainless steel and corrosion, but the price is slightly more expensive. Finally, there are Q235-B carbon steel, this is also useful, but poor corrosion resistance. Generally speaking on the common is these four materials.