Annealing is a heat treatment process used mostly to increase the ductility and reduce the hardness of a material. This change in hardness and ductility is a result of the reduction of dislocations in the crystal structure of the material being annealed.

Steel is an alloy of iron and carbon. All steel is carbon steel. Carbon steel is used to represent steel with carbon as the main alloying element.

In daily life, we often confuse steel and iron as a concept and regard them as the same product. In fact, steel and iron are different products. So, what is the difference between iron and steel? Steel is a general term for iron-carbon alloys with a carbon content of 0.02% to 2.11% by mass.

Tool steel is the steel used to produce cutting tools, measuring tools, molds and wear-resistant tools. Tool steel has high hardness and can maintain high hardness and red hardness at high temperatures, as well as high wear resistance and appropriate toughness.

Steel is made by mixing carbon and iron at very high temperatures (above 2600°F).Carbon is an essential part of making steel. To get pure carbon, the process starts by converting coking coal to coke by driving off the impurities leaving behind pure carbon.