(1) processing 
 Tool steel should have good thermal pressure processing and mechanical processing properties, in order to ensure the manufacture and use of tools. Steels depends on the chemical composition, the quality of the organization. 
 (2) quenching temperature range 
 Tool steel hardening temperature should be wide enough to reduce the possibility of overheating. 
 (3) hardening and hardenability 
 Hardened steel is the best in the highest hardness after quenching performance. Hardened steel is mainly with the chemical composition, especially carbon content, the higher the carbon content, the higher the hardenability of steel. Hardenability after quenching said steel in hardness from the surface to the internal distribution. Hardenability and the level of steel chemical composition, purity, grain size related. According to the different tools used in the manufacture, these two properties have certain requirements. 
 (4) the sensitivity of decarburization 
 Tool surface decarburization, hardness of surface layer will decrease, thus requiring low sensitivity of decarburization of steel workers. The increase in the same conditions, the decarburization of steel depends on its chemical sensitivity. 
 (5) heat treatment deformation 
 Tool during heat treatment, asking them to size and shape stability. 
 (6) of resistance to cutting 
 Manufacture of cutting tools and measuring tools are steel. Requires a good grinding of. The grinding of steel and its chemical composition, in particular, vanadium content, if the mass fraction of vanadium is not less than 0.50% grinding of deterioration. 

 (1) processing 

 Tool steel should have good thermal pressure processing and mechanical processing properties, in order to ensure the manufacture and use of tools. Steels depends on the chemical composition, the quality of the organization. 

 (2) quenching temperature range 

 Tool steel hardening temperature should be wide enough to reduce the possibility of overheating. 

 (3) hardening and hardenability 

 Hardened steel is the best in the highest hardness after quenching performance. Hardened steel is mainly with the chemical composition, especially carbon content, the higher the carbon content, the higher the hardenability of steel. Hardenability after quenching said steel in hardness from the surface to the internal distribution. Hardenability and the level of steel chemical composition, purity, grain size related. According to the different tools used in the manufacture, these two properties have certain requirements. 

 (4) the sensitivity of decarburization 

 Tool surface decarburization, hardness of surface layer will decrease, thus requiring low sensitivity of decarburization of steel workers. The increase in the same conditions, the decarburization of steel depends on its chemical sensitivity. 

 (5) heat treatment deformation 

 Tool during heat treatment, asking them to size and shape stability. 

 (6) of resistance to cutting 

 Manufacture of cutting tools and measuring tools are steel. Requires a good grinding of. The grinding of steel and its chemical composition, in particular, vanadium content, if the mass fraction of vanadium is not less than 0.50% grinding of deterioration.