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Kennametal Stellite Stellite® 25 Cobalt Chromium Cast Alloy

Category Metal , Nonferrous Metal , Cobalt Alloy , Superalloy
Manufacturer Kennametal Stellite
Trade Name Stellite®
Port Ningbo port,China
Trade Terms FOB, CFR, CIF
Payment Terms L/C, T/T, Western Union
Download PDF Kennametal Stellite Stellite® 25 Cobalt Chromium Cast Alloy.pdf
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Material Notes:
Stellite alloy 25 forms a protective oxide film during hot metal-on metal wear which prevents metal transfer and damage due to adhesion. The alloy is resistant to thermal cracking and surface fatigue. Since the micro-structure is relatively free of carbide reinforcement, it is not recommended for low stress or low angle particle erosion service.Stellite alloy 25 is resistant to oxidation and carburization up to 1900°F. The alloy resists wet chlorine at ambient temperatures and is resistant to nitric and hydrochloric acids under certain conditions. Exposure testing is recommended to verify performance.Applications include metal working tools where a combination of metal-on-metal wear, thermal fatigue and hot corrosion resistance are required, such as piercing points, forming tools, and extrusion dies. Also used for furnace hardware. The alloy is normally used in the as-cast condition, but can be age hardened in the 1300° to 1500°F range for 4 to 50 hours. Solution annealing involves quenching or forced air cooling from 2175° to 2225°F. Information provided by Deloro Stellite Inc.Product of former Deloro Stellite Inc.
Physical Properties Metric English Comments
Density 8.31 g/cc
0.300 lb/in³
Mechanical Properties Metric English Comments
Hardness, Brinell 350
350
130

@Temperature 900 °C
130

@Temperature 1650 °F
280

@Temperature 500 °C
280

@Temperature 932 °F
Hardness, Rockwell C 10 - 35
10 - 35
Tensile Strength, Ultimate 925 MPa
134000 psi
Tensile Strength, Yield 895 MPa
130000 psi
Elongation at Break 5.0 %
5.0 %
Reduction of Area 7.0 %
7.0 %
Modulus of Elasticity 207 GPa
30000 ksi
Charpy Impact 8.70 J
6.42 ft-lb
V Notch
Thermal Properties Metric English Comments
CTE, linear 12.9 µm/m-°C

@Temperature 20.0 - 205 °C
7.17 µin/in-°F

@Temperature 68.0 - 401 °F
14.4 µm/m-°C

@Temperature 20.0 - 538 °C
8.00 µin/in-°F

@Temperature 68.0 - 1000 °F
14.8 µm/m-°C

@Temperature 20.0 - 650 °C
8.22 µin/in-°F

@Temperature 68.0 - 1200 °F
16.2 µm/m-°C

@Temperature 20.0 - 877 °C
9.00 µin/in-°F

@Temperature 68.0 - 1610 °F
16.9 µm/m-°C

@Temperature 20.0 - 982 °C
9.39 µin/in-°F

@Temperature 68.0 - 1800 °F
Thermal Conductivity 9.40 W/m-K
65.2 BTU-in/hr-ft²-°F
Melting Point 1329 - 1410 °C
2424 - 2570 °F
Solidus 1329 °C
2424 °F
Liquidus 1410 °C
2570 °F
Maximum Service Temperature, Air 1038 °C
1900 °F
Oxidation resistant
Component Elements Properties Metric English Comments
Boron, B 0.00 %
0.00 %
Carbon, C <= 0.45 %
<= 0.45 %
Chromium, Cr 20 %
20 %
Cobalt, Co 51 %
51 %
As remainder
Iron, Fe 2.0 %
2.0 %
Manganese, Mn 1.5 %
1.5 %
Nickel, Ni 10 %
10 %
Silicon, Si 0.70 %
0.70 %
Tungsten, W 15 %
15 %
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