How many kinds of steel are used to make kitchen knives?

There are many kinds of steel used to make kitchen knives;

The most common ones are Yangjiang stainless steel knives and traditional old kitchen knives, such as Guofan cannonball steel kitchen knives. There are some local brands of kitchen knives in every place, and the materials used to make the knives are stainless manganese steel, spring steel, tungsten steel, carbon steel shell steel and so on. In fact, so many different steels can be called carbon steel except stainless steel knives, because all the above steels contain certain carbon elements, and only different steel grades are smelted according to different steel uses.