The categories are divided into two categories, one is ferrous metals and the other is non-ferrous metals.

 

Ferrous metals are alloy materials of iron and carbon (pure iron is included in ferrous metals), mainly steel with lower carbon content and cast iron with higher carbon content;

 

Metals other than ferrous metals are non-ferrous metals, including many types, such as aluminum and aluminum alloys, copper and copper alloys, tin and tin alloys, zinc and zinc alloys, superalloys (nickel alloys, titanium alloys, etc.), precious metals (gold, platinum, silver, etc.), and a liquid metal at room temperature - mercury, etc.