HIGH SPEED STEEL Performance FOR HSS cobalt 5%-M35  

HSS CODE: W6Mo5Cr4V2Co5 (M35)  

Chemical compositons(%):  

 C                   Si                   Mn               W                  Mo             Cr                 V                  Co                 

 0.88-0.96   0.20-0.60      0.2-0.40      6.0-6.70     4.70-5.20     3.80-4.50        1.70-2.00      4.5-5.0       

 International Code:   

ASTM: M35(A600)

UNS:  

JIS:SKH55

DIN: S6-5-2-5

BS: 

NF: HS6-5-2-5 

ROCT:  P6M5K5 

ISO:   HS6-5-2-5

China：M35   

Density Annealed(g/cm): 8.11  

Heat treatment:Starting: 1100 

Finishing:900   

Usage:Its suitable for cutters of high speed cutting lathes and cutters in high temperature resisting with shaking force. 

Anneal temperature （℃) 840-860   

Stress relief Temperature（℃）:600-650  

Quench temperature （℃）:1200-1235   

Coolant media of quench : salt bath  at 600℃,or Oil  cool or air cool  

Normal temperature of temper（℃）: 540-560   

Quench and temper HRC: 64-67   

Bending Strength(Mpa):    3000-Impact 

Toughness(MJ/㎡): 0.30   

HRC at 600℃(HRC):   54 

Character: It's general used HSS Co of W-Mo series.Red Hardness,High Temperature Hardness and Grandability  are higher than W6Mo5Cr4V2(M2).The Better performance of Cutting and Grinding,but strengthen and impact toughness lower.It is easy being oxidized and decarburization in Heat treatment and Heat working.