Grade Range Chart

P
Steel

01

C8

Precision finishing

arrow-up-blue
increasing wear resistance
 

 

increasing shock resistance
arrow-down-blue


10

C7

Light
finishing

20

C6

Semi-finishing

30

40

C5

Roughing
& general purpose

50

M
Stainless
Steel


10



Precision
finishing

arrow-up-gold
increasing wear resistance

 

 

increasing shock resistance
arrow-down-gold


20



Semi-finishing

30



General purpose

40



Roughing

K
Cast
Iron

01


C4


Precision finishing

arrow-up-red
increasing wear resistance

 

 

increasing shock resistance
arrow-down-red


10

C3

Semi-finishing

20

C2

General purpose

30

C1

Roughing

N
Non-
ferrous


01




Precision finishing


pmk-ch1
increasing wear resistance

 

 

increasing shock resistance
pmk-ch2

10




Semi-finishing


20




General purpose


30




Roughing


S
Hi-temp
Alloys


10



Precision finishing

pmk-ch5
increasing wear resistance

 

 

increasing
shock resistance
pmk-ch6

20



Semi-finishing

30



General
purpose

40



Roughing

H

Hardened
Materials


01



Precision finishing

pmk-ch1
increasing wear resistance

 

 

increasing shock resistance
pmk-ch2

10



Semi-finishing

20



General purpose

30



Roughing