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Co-Cr-W alloy powder

Cobalt base alloys typically contain tungsten and carbon for strengthening. Carbon has low solid solubility in cobalt and therefore, most of it partitions in WC, W2C and M6C or other carbides. These hard phases have a strengthening effect, making such alloys maintain high hardness and strength at temperatures 800℃. The cobalt-chromium-tungsten-carbon alloys generally have excellent properties to resist high temperature wear, oxidation and thermal fatigue.

Cobalt has a hexagonal-close-packed (hcp) crystal structure at temperatures below 417℃. Intrinsically, it has low coefficient of friction resulting in excellent wear resistance. At temperatures above 417℃, cobalt transforms from hcp to fcc (face-centered-cubic) crystal structure, thereby, generating volumtric. Therefore, it is recommended that in weld overlaying and spraying, the parts being coated are pre-heated to 500-600℃to avoid cracking in the coating or overlay.


Powder

HRC

Chemical Composition

Mesh Size

Typical Application

C

Cr

Si

W

Fe

Mo

Ni

Co

Mn

P

Co01

48-54

2.4

30

1

12

≦3.00

≦1.00

≦3.00

Bal

≦1.00


100/270

Valve seats,
bearings, cutting
blades, seal rings

Co03

48-54

2.3

30

1

12

≦3.00

/

≦3.00

Bal

/


100/270

Needle valve
seats, guide
rolls, valve seats

Co06

38-44

1.2

30

1

4.5

≦3.00


≦3.00

Bal

≦1.00


100/270
300/500

Engine valves, high
temperature pressure
valves, turbo blades

Co156

40-45

1.6

28

1.1

4.0




Bal



100/270

Automotive parts,
military  applications

Co06H

43-48

1.3

30

1.5

5.5

3.00
Max

0.8

3.00
Max

Bal

1.0
Max


100/270

Engine valves, high
temperature pressure
valves, turbo
engine blades

Co12

42-48

1.4

29

1.4

8.5

≦3.00

≦1.00

≦3.00

Bal

≦1.00


100/270

High temperature
pressure valves,
saw teeth,
extrusion screws

Co12B

45-49

1.3

30

1

5.5

3.0
Max

5

10.5

Bal

1.0
Max


100/270

Saw guide plates

Co12H

48-53

1.7

30

1.7

7

2.0
Max

2.0

3.0
Max

Bal

0.5
Max


100/270

High temperature
pressure valves,
saw teeth,
extrusion screws

Co6113

43-48

1.8

27




4.0

6.0

Bal



100/270

Resistance to
corrosionand wear

Co107

40-44
(46-50)

2.0

35

1

5

2.0
Max


24

Bal

1


100/270

Work hardening

Co19

48-56

1.8

31

1.0

11

3.0
Max


3.0
Max

Bal

1.0


100/270

Cutting knives

CoF

37-44

1.6

26

1.1

12

3.0
Max

0.5
Max

22.5

Bal

0.5
Max


100/270

Engine valves

CoFH

38-44

1.4

28

1.2

12

3.0
Max

0.8

22.5

Bal

0.5


100/270

Engine valves

Co20

47-53

2.5

32

1

18

≦3.00

≦1.00

≦3.00

Bal

≦1.00


300/500

Bearing sleeves,
wear plates

Co07

30-36

0.4

26

0.9

5.5

3.0
Max


3.0
Max

Bal

0.3


100/270

Steam turbine
blades, brass
casting molds,
extrusion molds

CoX-40

30-35

0.8

25.5

0.4

7.5

1.0
Max

1.0
Max

10.5

Bal

0.5
Max

0.04
Max

100/270

Steam turbine
parts for resisting
high temperature
degradation and erosion

Co31

30-35

0.4

25.5

0.8

7.5

2.0
Max

0.5
Max

10.5

Bal

0.5
Max


100/270

Steam turbine
parts for resisting
high temperature
degradation and erosion

Co694

47-53

1.0

28

1

19

2.5
Max



Bal

1


100/270

Steam turbine
parts for resisting
high temperature
degradation and erosion

Co25

20
Max

0.05
Max

20

0.8

15

3.0
Max

8

10

Bal

1.3


100/270

Hot extrusion molds

Co306

34-40

0.4

25

1

2.5

4.0
Max


6.0

Bal

1.0


100/270

Steel hot rolling
shears, clamps,
guide rolls.

Co238

20-26

0.1

26

1


20

3.0


Bal

1.0


100/270

Forging dies

Co190

57-63

3.3

26

0.8

14

3.0
Max

1.0
Max

3.0
Max

Bal

1.0
Max


100/270

Oil drilling heads

Co400

48-54

0.08
Max

8.5

2.5


2.0
Max

29

1.0
Max

Bal

0.5
Max


100/270
300/500

Galvanizing line
bearing sleeves
and shaft sleeves

Co400M1

50-54

0.08
Max

14

2.6


0.5
Max

26

0.5

Bal

0.1
Max


100/270
300/500

To resist high
temperature corrosion,
galvanizing bearing
sleeves, shaft sleeves

Co400M2

46-52

0.08
Max

17

1.2


0.5
Max

22

0.5
Max

Bal

0.5
Max


100/270
300/500

Resist high
temperature degradation,
galvanizing bearing
sleeves, shaft sleeves,
natural gas engine valves

Co800

52-58

0.08
Max

17.5

3.5


2.0
Max

29

1.0Max

Bal

0.5
Max


300/500

Resist high
temperature degradation

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