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Kennametal Stellite Nucalloy® 488V High-Silicon Nickel-Base Hardfacing Alloy

Category Metal , Nonferrous Metal , Nickel Alloy , Superalloy
Manufacturer Kennametal Stellite
Trade Name Nucalloy®
Port Shanghai port,China
Trade Terms FOB, CFR, CIF
Payment Terms L/C, T/T, Western Union
Download PDF Kennametal Stellite Nucalloy® 488V High-Silicon Nickel-Base Hardfacing Alloy.pdf
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Material Notes:
Applications include diesel engine valves, and injection mold screws.Nucalloy® alloys are unique, patented, high-silicon, nickel-base hardfacing alloys that are designed to have optimum combinations of hardness and toughness, similar to the cobalt base alloys . Because of the unique microstructure features, they are less crack sensitive than the conventional nickel-base hardfacing alloys, such as, NiCr-A and NiCr-B, during welding.The Nucalloy alloys have a matrix consisting of, essentially, nickel solid solution, a binary eutectic and ternary eutectic. The binary eutectic is composed of nickel solid solution and nickel silicide (Ni3Si); whereas the ternary eutectic consists of nickel solid solution, nickel boride (Ni3B) and nickel silicide (Ni3Si). There are also carbide and boride particles dispersed in the matrix. The microstructures of these alloys differ from those of the conventional self-fluxing nickel alloys in that the brittle binary eutectic of nickel solid solution and nickel boride does not form because of the intentionally controlled high silicon to boron ratios.The high silicon and low boron in these alloys results in high fractions of nickel silicide, which is resistant to certain corrosive media due to the tendency to form a high-silicon film on the surface.Information provided by Deloro Stellite Inc.Product of former Deloro Stellite Inc.
Physical Properties Metric English Comments
Density 8.10 g/cc
0.293 lb/in³
Mechanical Properties Metric English Comments
Hardness, Rockwell C 45
45
Hardness, Vickers 484
484
362

@Temperature 700 °C
362

@Temperature 1290 °F
406

@Temperature 600 °C
406

@Temperature 1110 °F
421

@Temperature 500 °C
421

@Temperature 932 °F
430

@Temperature 400 °C
430

@Temperature 752 °F
Tensile Strength, Ultimate 945 MPa
137000 psi
834 MPa

@Temperature 600 °C
121000 psi

@Temperature 1110 °F
931 MPa

@Temperature 400 °C
135000 psi

@Temperature 752 °F
Charpy Impact Unnotched 6.50 J/cm²

@Temperature 20.0 °C
30.9 ft-lb/in²

@Temperature 68.0 °F
7.50 J/cm²

@Temperature 400 °C
35.7 ft-lb/in²

@Temperature 752 °F
8.00 J/cm²

@Temperature 600 °C
38.1 ft-lb/in²

@Temperature 1110 °F
Thermal Properties Metric English Comments
CTE, linear 11.0 µm/m-°C

@Temperature 20.0 - 100 °C
6.11 µin/in-°F

@Temperature 68.0 - 212 °F
11.6 µm/m-°C

@Temperature 20.0 - 200 °C
6.44 µin/in-°F

@Temperature 68.0 - 392 °F
12.0 µm/m-°C

@Temperature 20.0 - 300 °C
6.67 µin/in-°F

@Temperature 68.0 - 572 °F
12.3 µm/m-°C

@Temperature 20.0 - 400 °C
6.83 µin/in-°F

@Temperature 68.0 - 752 °F
12.5 µm/m-°C

@Temperature 20.0 - 500 °C
6.94 µin/in-°F

@Temperature 68.0 - 932 °F
12.7 µm/m-°C

@Temperature 20.0 - 600 °C
7.06 µin/in-°F

@Temperature 68.0 - 1110 °F
Melting Point 1075 - 1220 °C
1967 - 2230 °F
Solidus 1075 °C
1967 °F
Liquidus 1220 °C
2230 °F
Component Elements Properties Metric English Comments
Boron, B 1.0 %
1.0 %
Carbon, C 0.30 %
0.30 %
Chromium, Cr 20.5 %
20.5 %
Iron, Fe 7.5 %
7.5 %
Nickel, Ni 63 %
63 %
As Remainder
Silicon, Si 6.0 %
6.0 %
Tungsten, W 2.0 %
2.0 %
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