EDM Block

EDM Block

Carbide Grade: OBI10

For thickness below 0.5mm stainless steel, 

LED lead frame

Grade

Cobalt %

Density

Hardness

T.R.S

Compress Strength

Rupture toughness

Expansion coefficient

g/cm3

HRA

N/mm2

N/mm2

Mpa.M1/2

10-6/

OBI10

12

14.15

90.2

3800

5200

13

5.7


Carbide Grade: OBI20

For thickness below 0.6mm stainless steel, 

LED lead frame

Grade

Cobalt %

Density

Hardness

T.R.S

Compress Strength

Rupture toughness

Expansion coefficient

g/cm3

HRA

N/mm2

N/mm2

Mpa.M1/2

10-6/

OBI20

14.5

13.98

90.5

3500

5600

12

5.8


Carbide Grade: OBI30

For thickness between 0.01-1.0mm stainless steel, 

LED lead frame

Grade

Cobalt %

Density

Hardness

T.R.S

Compress Strength

Rupture toughness

Expansion coefficient

g/cm3

HRA

N/mm2

N/mm2

Mpa.M1/2

10-6/

OBI30

12

14.25

90.5

3700

5000

13

5.7


Carbide Grade: OBC10

For punching Cu, Fe, Al sheets

Grade

Cobalt %

Density

Hardness

T.R.S

Compress Strength

Rupture toughness

Expansion coefficient

g/cm3

HRA

N/mm2

N/mm2

Mpa.M1/2

10-6/

OBC10

14.5

14

90

3800

5200

13

5.7


Carbide Grade: OBC20

For punching Cu, Fe, Al sheets


Grade

Cobalt %

Density

Hardness

T.R.S

Compress Strength

Rupture toughness

Expansion coefficient

g/cm3

HRA

N/mm2

N/mm2

Mpa.M1/2

10-6/

OBC20

5

14.9

90.5

3700

5000

13

5.8


Carbide Grade: OBD10

For making powder metallurgy molds, motor molds

Grade

Cobalt %

Density

Hardness

T.R.S

Compress Strength

Rupture toughness

Expansion coefficient

g/cm3

HRA

N/mm2

N/mm2

Mpa.M1/2

10-6/

OBD10

14

13.85

89

3000

5000

13

5.7


Carbide Grade: OBD20

For making powder metallurgy molds, motor molds (UPER)

Grade

Cobalt %

Density

Hardness

T.R.S

Compress Strength

Rupture toughness

Expansion coefficient

g/cm3

HRA

N/mm2

N/mm2

Mpa.M1/2

10-6/

OBD20

11.5

14.05

89.5

3000

5000

17

6.1


Carbide Grade: OBD30

For making powder metallurgy molds, motor molds (BOTTOM)


Grade

Cobalt %

Density

Hardness

T.R.S

Compress Strength

Rupture toughness

Expansion coefficient

g/cm3

HRA

N/mm2

N/mm2

Mpa.M1/2

10-6/

OBD30

14.5

13.95

88.5

3000

5000

17

6.1