High degree of quality assurance 

 With a fine and uniform carbide organization, improve the quality of reliability 

 High degree of resistance to Suila 

 As the field of high hardness with high toughness, and rupture can prevent Suila 

 Excellent high hardness 

 Containing large amounts of carbon generated elements, and some never get the hardness and improve wear resistance and strength to reduce the processing technology to improve the precision 

 Since the organization of granular carbon, improved by cutting, reducing heat deformation of the anisotropic direction, to reduce processing 

 Improve the precision 



 Uses: 

 High toughness steel 

 A variety of stamping dies, mold components (punch, pin lever, etc.), various knives, iron, Taps, Cutting Tools 



 Chemical composition: 

 Datong steel chemical composition (%) 

 C Cr Mo WV Co 

 DEX20 1.3 4 5 6.5 3.0 - 



 Heat Treatment: 

 Datong steel heat treatment 

 Before ignition temperature is not processed before the processing of hardness is not burning burning after ignition temperature processing temperature hardness 

 DEX20 800 ~ 880 ℃ 

 Xu cold 285HB the following 1180 ~ 1220 ℃ 540 ~ 570 ℃ 64HRC