What is the difference between steel and iron and stainless steel?

Steel is obtained by appropriately mixing carbon elements in iron. In the iron and steel industry, the carbon content of less than 2.11% is called steel, and the carbon content of more than 2.11% is called iron. Stainless steel is also called alloy steel, which is added to ordinary steel. Cobalt, Chromium, nickel, tungsten, titanium and other metals.
The "iron-carbon alloy" with a carbon content of less than 2% is called "carbon steel". Carbon steel is divided into low carbon steel, medium carbon steel and high carbon steel according to the carbon content.
When other elements are added to the steel, it is called "alloy steel". The purpose of smelting alloy steel is to meet the needs of production and life.
Stainless steel is a kind of alloy steel, with more metal alloying elements such as Ci and Ni added, there are many types.
Common stainless steels are divided into two types: "ferritic stainless steel" and "austenitic stainless steel".
Ferritic stainless steel has a body-centered lattice and is magnetic. For example: 1Ci13, 2Ci13. Often used to make tableware, decorative pieces.
Austenitic stainless steel has a face-centered lattice and is non-magnetic. For example: 1Ci18Ne9T, used in chemical, pharmaceutical and food industries. If someone says that the use of magnets to identify whether it is stainless steel, it is not comprehensive.
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[Title]What is the difference between steel and iron and stainless steel
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