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Kennametal Stellite Stellite® 21

Category Metal , Nonferrous Metal , Cobalt Alloy , Superalloy
Manufacturer Kennametal Stellite
Trade Name Stellite®
Port Shanghai port,China
Trade Terms FOB, CFR, CIF
Payment Terms L/C, T/T, Western Union
Download PDF Kennametal Stellite Stellite® 21.pdf
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Material Notes:
Excellent high temperature strength, high toughness. Solution treat at 1191-1204°C, rapid air cool, age between 538-871°C to increase hardness and strength at the expense of impact and ductility.Applications: turbine blades and vanes, hot die applications, components in combustion or exhaust systems where high strength to 816°C and oxidation to 1093°C is required, used as medical and dental components as well as remelt stock.Corrosion:Excellent resistance to body fluids and has been used for medical implants, dental fixtures, and surgical equipment. Good resistance to cavitation corrosion.Machinability: best in solution treated condition. Carbide tipped tools and low speeds and feeds should be used to avoid work hardening. Lubrication is normally used.Wear: Excellent galling resistance when self-mated or mated with Stellite alloy-6. Resistance to cavitation erosion nearly as good as Stellite alloy 6 and as good or better at high loads. Lower carbon content makes it inferior to Stellite alloy 6 for low stress abrasion resistance.Data provided by the manufacturer, Deloro Stellite Inc.Product of former Deloro Stellite Inc. Simlar to Vitallium, ASTM F75, HS21
Physical Properties Metric English Comments
Density 8.31 g/cc
0.300 lb/in³
Mechanical Properties Metric English Comments
Hardness, Brinell 237
237
101

@Temperature 871 °C
101

@Temperature 1600 °F
137

@Temperature 649 °C
137

@Temperature 1200 °F
143

@Temperature 538 °C
143

@Temperature 1000 °F
148

@Temperature 427 °C
148

@Temperature 800 °F
Hardness, Knoop 278
278
Converted from Brinell hardness.
Hardness, Rockwell A 64
64
Converted from Rockwell C hardness. Beyond normal Rockwell B range, for comparison only.
Hardness, Rockwell B 103
103
Converted from Rockwell C hardness.
Hardness, Rockwell C 22 - 32
22 - 32
Hardness, Vickers 244
244
Converted from Brinell hardness.
Tensile Strength, Ultimate 724 MPa
105000 psi
Tensile Strength, Yield 517 MPa
75000 psi
Elongation at Break 9.0 %
9.0 %
Modulus of Elasticity 248 GPa
36000 ksi
Compressive Yield Strength 1359 MPa
197100 psi
Charpy Impact 13.6 J
10.0 ft-lb
V-Notch
Thermal Properties Metric English Comments
CTE, linear 14.1 µm/m-°C

@Temperature 20.0 - 315 °C
7.83 µin/in-°F

@Temperature 68.0 - 599 °F
14.3 µm/m-°C

@Temperature 20.0 - 427 °C
7.94 µin/in-°F

@Temperature 68.0 - 801 °F
14.7 µm/m-°C

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

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

@Temperature 20.0 - 649 °C
8.39 µin/in-°F

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

@Temperature 20.0 - 816 °C
8.67 µin/in-°F

@Temperature 68.0 - 1500 °F
Thermal Conductivity 14.7 W/m-K
102 BTU-in/hr-ft²-°F
Melting Point 1338 - 1366 °C
2440 - 2491 °F
Solidus 1338 °C
2440 °F
Liquidus 1366 °C
2491 °F
Component Elements Properties Metric English Comments
Boron, B <= 0.0070 %
<= 0.0070 %
Carbon, C 0.25 %
0.25 %
Chromium, Cr 27 %
27 %
Cobalt, Co 62.25 %
62.25 %
As remainder
Iron, Fe 1.5 %
1.5 %
Molybdenum, Mo 5.5 %
5.5 %
Nickel, Ni 2.75 %
2.75 %
Silicon, Si 0.75 %
0.75 %
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