US
Industry
Code

ISO
Code

Grade

Composition

Specific
Gravity
g/cm3
  0.25

Hardness
HRA
0.5

Transverse
Rupture
Strength
KSI, Min.

GrainSize

Recommended Applications

WC

Co

TaC

TiC

Others

Microns

Class

C-1

K30-K40

CT-1

90

10

14.55

91.1

250

1-2

Fine

Roughing cuts - Cast iron & non-ferrous  materials

C-2

K20

CT-6

94

6

14.95

91.9

235

1-2

Fine

General purpose - Cast iron & non ferrous materials

C-13

CT-13

83

17

13.85

87.2

335

3-4

Coarse

Medium impact dies

US
Industry
Code

ISO
Code

Grade

Composition

Specific
Gravity
g/cm3
  0.25

Hardness
HRA
0.5

Transverse
Rupture
Strength
KSI, Min.

GrainSize

Recommended Applications

WC

Co

Others

Microns

Class

C-2 to   C-3

K20

CT-61

94

6

14.95

92.4

250

1.0

Micrograin

C-4

K01-K05

CT-60

94

6

14.95

92.9

300

0.8

Submicron

C-3

K10

CT-80

91.5

8.5

*

14.80

92.4

350

0.8

Submicron

C-2

K20

CT-110

90

10

*

14.52

91.9

450

0.8

Submicron

C-1

K30-K40

CT-116

84

16

*

13.90

89.6

500

0.8

Submicron

CT-212

88

12

*

14.32

92.2

0.5

0.5-micron