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Product Detail

GH93

Detail

GH93

Chinesegrade: GH93 cobalt-based superalloy

British grade: Nimonic93

I. Overview of GH93:  

GH93 is a precipitation-hardenednickel-based alloy containing higher cobalt and chromium, which has higherstrength and better structural stability and can work below 815 ° C with goodcomprehensive properties.   It isextensively used in turbine blades for aircraft engines, turbine disks andfasteners for small engines. The alloy has good hot working plasticity, and canbe supplied in form of plate, bar and forging.

1. Chemical composition: %

C≤

Si≤

Mn≤

P≤

S≤

Cr≥

Ni≥

Mo≥

Cu≤

0.13

1.00-

1

0.015

0.015

18.0-21.0

Balance


0.2

Other

B≤

Al≤

Ti≤

Fe≤

Co≤

Pb≤

W≤

Nb≤

0.02

1.0-2.0

2.0-3.0

1

15.0-21.0

0.0025

-

-

Note: B is added in a calculated amount,and the addition of trace amounts of Ce, Zr, Mg is allowed.

II. Physical andchemical properties:     

1. Thermal performance:                                       

(1) Melting temperature range: 1360 1390 .

(2) Thermal conductivity:  

θ/

20

100

200

300

400

500

600

700

800

900

λ/(W/(m · ))

11.47

12.77

14.44

15.99

17.54

18.97

20.64

22.32

23.99

25.83

(3) Specific heat capacity:

θ/

20

100

200

300

400

500

600

700

800

900

c/(J/(kg. ))

446

467

494

520

547

572

600

626

652

679

(4) Coefficient of linear expansion:

θ/

16   to 100

16   200

16   300

16   400

16   500

16   600

16   700

α/10 -6 -1

11.91

12.97

13.52

14.1

14.49

14.99

15.61

2. Density: ρ = 8.19g/cm 3 .

3. Magnetic properties: non-magnetic.  

4. Chemical properties:  

(1) Oxidation resistance: See Table 2-4 forthe oxidation rate after 100h test in air medium.

θ/

700

800

900

Oxidation rate/(g/(m 2 · h))

0.0398

0.0236

0.1435

Note: The test method is according toYB48-1964.

(2) Corrosion resistance: The alloy hasgood heat and corrosion resistance.


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