SKH-51 tool steel properties and applications
 
Forging: 1.100 ~ 900 ℃
 
Annealing: Heat to 800-850 ℃, remain at this temperature in two to four hours in the furnace allowed to cool gradually.
 
Quenching: the first pre-heated to 550-600 ℃, times heated to 950 ℃, and then heated to a: 1,220 ~ 1250 ℃; b: 1,200 ℃ ~ 1230 ℃. Hardened in oil, but oil must be moisture 40-60 ℃ (a. general tools; b. form a complex type of tool needed toughness)
 
Tempering: heating to 550-570 ℃, to stay at this temperature and then cooled in still air, tempering must be repeated twice
 
Hardness: HRC63 ℃ above.
 
Use: This high-speed steel, tungsten steel, appropriate for manufacturing powerful cutting wear resistance, impact tools, high-level die, screw mode, the more complex needs toughness and shape tools, milling cutters, drills, etc.
 
Dimensions:
 
3.2X32-40-50-65-80-105-130-155-205-255-305-380
 
4.5X32-40-50-65-80-105-130-155-205-255-305-380
 
6X32-40-50-65-80-105-130-155-205-255-305-380
 
8X32-40-50-65-80-105-130-155-205-255-305-380
 
10X32-40-50-65-80-105-130-155-205-255-305-380
 
13X32-40-50-65-80-105-130-155-205-255-305-380
 
16X32-40-50-65-80-105-130-155-205-255-305-380
 
19X32-40-50-65-80-105-130-155-205-255-305-380
 
22X32-40-50-65-80-105-130-155-205-255-305-380
 
26X32-40-50-65-80-105-130-155-205-255-305-380
 
32X32-40-50-65-80-105-130-155-205-255-305-380
 
38X32-40-50-65-80-105-130-155-205-255-305-380
 
45X32-40-50-65-80-105-130-155-205-255-305-380
 
50X32-40-50-65-80-105-130-155-205-255-305-380