M42 HIGH SPEED STEEL (HSS-Co 8%)

M42 HIGH SPEED STEEL (HSS-Co 8%）
 
Applications: This kind steel is suitable for tools subject to server mechanical wear particularly suitable for die sinking cutters, band Saw milling cutters and components of engraving machines including gravers as well as tool bits in automatic lathes. Also suitable for non-cutting shaping.
 
Characteristic: It is one of the typical super-hard Co HSS, with high hardness and hot hardness, high red hardness and good wear resistance.
 
Chemical Composition:(%) 
C:1.10   W:1.50 Mo:9.50  Cr:3.875  V:1.15  Co:8.0  Mn:0.27   Si:0.40   P≤0.03   S≤0.02
 
Delivery status: Soft annealed max.270HB
 
Heat Treatment:
Hardening Temperature:1160-1180℃
Quenching Medium: oil & salt bath
Tempering Temperature:530-560℃
Tempering Times:3 times
Tempering Hardness:66-69HRC