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Special Metals INCONEL® alloy 740 Precipitation-Hardenable Ni-Cr-Co Superalloy

Category Metal , Nonferrous Metal , Cobalt Alloy , Nickel Alloy , Superalloy
Manufacturer Special Metals (includes the former Inco Alloys International Inc.)
Trade Name INCONEL®
Port Ningbo port,China
Trade Terms FOB, CFR, CIF
Payment Terms L/C, T/T, Western Union
Download PDF Special Metals INCONEL® alloy 740 Precipitation-Hardenable Ni-Cr-Co Superalloy.pdf
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Material Notes:
INCONEL® alloy 740 is a nickel-chromium-cobalt alloy developed by Special Metals Corporation. The alloy is age hardenable by the precipitation of a gamma prime second phase. Potential applications include advanced power production boiler tubes and diesel engine exhaust valves. INCONEL alloy 740 is still under development. While the composition is defined, work is continuing on processing the alloy.Information Provided by Special Metals Corporation
Physical Properties Metric English Comments
Density 8.05 g/cc
0.291 lb/in³
Mechanical Properties Metric English Comments
Hardness, Rockwell C 33.6
33.6
Tensile Strength, Ultimate 1209 MPa
175300 psi
Tensile Strength, Yield 818.4 MPa

@Strain 0.200 %
 118700 psi

@Strain 0.200 %
Elongation at Break 36.4 %
36.4 %
Modulus of Elasticity 158 GPa

@Temperature 900 °C
 22900 ksi

@Temperature 1650 °F
193 GPa

@Temperature 500 °C
 28000 ksi

@Temperature 932 °F
218 GPa

@Temperature 100 °C
 31600 ksi

@Temperature 212 °F
221 GPa

@Temperature 22.0 °C
 32100 ksi

@Temperature 71.6 °F
Thermal Properties Metric English Comments
CTE, linear 12.38 µm/m-°C

@Temperature 100 °C
 6.878 µin/in-°F

@Temperature 212 °F
14.27 µm/m-°C

@Temperature 500 °C
 7.928 µin/in-°F

@Temperature 932 °F
15.81 µm/m-°C

@Temperature 900 °C
 8.783 µin/in-°F

@Temperature 1650 °F
Specific Heat Capacity 0.449 J/g-°C

@Temperature 23.0 °C
 0.107 BTU/lb-°F

@Temperature 73.4 °F
0.476 J/g-°C

@Temperature 100 °C
 0.114 BTU/lb-°F

@Temperature 212 °F
0.513 J/g-°C

@Temperature 500 °C
 0.123 BTU/lb-°F

@Temperature 932 °F
0.635 J/g-°C

@Temperature 900 °C
 0.152 BTU/lb-°F

@Temperature 1650 °F
Thermal Conductivity 10.2 W/m-K

@Temperature 23.0 °C
 70.8 BTU-in/hr-ft²-°F

@Temperature 73.4 °F
11.7 W/m-K

@Temperature 100 °C
 81.2 BTU-in/hr-ft²-°F

@Temperature 212 °F
17.1 W/m-K

@Temperature 500 °C
 119 BTU-in/hr-ft²-°F

@Temperature 932 °F
23.8 W/m-K

@Temperature 900 °C
 165 BTU-in/hr-ft²-°F

@Temperature 1650 °F
Melting Point 1288 - 1362 °C
2350 - 2484 °F
Solidus 1288 °C
2350 °F
Liquidus 1362 °C
2484 °F
Component Elements Properties Metric English Comments
Aluminum, Al 0.90 %
0.90 %
Carbon, C 0.030 %
0.030 %
Chromium, Cr 25 %
25 %
Cobalt, Co 20 %
20 %
Iron, Fe 0.70 %
0.70 %
Manganese, Mn 0.30 %
0.30 %
Molybdenum, Mo 0.50 %
0.50 %
Nickel, Ni 48.27 %
48.27 %
Remainder
Niobium, Nb (Columbium, Cb) 2.0 %
2.0 %
Silicon, Si 0.50 %
0.50 %
Titanium, Ti 1.8 %
1.8 %
Electrical Properties Metric English Comments
Electrical Resistivity 0.0001168 ohm-cm
0.0001168 ohm-cm
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