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Special Metals INCONEL® Alloy 751

Category Metal , Nonferrous Metal , Nickel Alloy , Superalloy
Manufacturer Special Metals (includes the former Inco Alloys International Inc.)
Trade Name INCONEL®
Port Shanghai port,China
Trade Terms FOB, CFR, CIF
Payment Terms L/C, T/T, Western Union
Download PDF Special Metals INCONEL® Alloy 751.pdf
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Material Notes:
A nickel-chromium alloy similar to INCONEL ALLOY X-750 but with increased aluminum content for greater precipitation hardening. INCONEL alloy 751 was designed for use as exhaust valves in internal-combustion engines. In that application, the alloy offers high strength at operating temperatures, high hot hardness for wear resistance, and corrosion resistance in hot exhaust gases containing lead oxide, sulfur, bromine, and chlorine. The standard product form is round bar.Data provided by the manufacturer, Special Metals.
Physical Properties Metric English Comments
Density 8.22 g/cc
0.297 lb/in³
Mechanical Properties Metric English Comments
Tensile Strength, Ultimate 1030 MPa

@Temperature 650 °C
149000 psi

@Temperature 1200 °F
Precipitation Hardened prior to test
1275 MPa

@Temperature 23.0 °C
184900 psi

@Temperature 73.4 °F
Tensile Strength, Yield 875 MPa

@Strain 0.200 %
127000 psi

@Strain 0.200 %
Precipitation Hardened. Value at room temperature
760 MPa

@Strain 0.200 %,
Temperature 650 °C
110000 psi

@Strain 0.200 %,
Temperature 1200 °F
Precipitation Hardened prior to test
Elongation at Break 25 %
25 %
Precipitation Hardened
22 %

@Temperature 650 °C
22 %

@Temperature 1200 °F
Precipitation Hardened prior to test.
Thermal Properties Metric English Comments
CTE, linear 12.6 µm/m-°C

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

@Temperature 68.0 - 212 °F
Specific Heat Capacity 0.431 J/g-°C
0.103 BTU/lb-°F
Thermal Conductivity 12.0 W/m-K
83.3 BTU-in/hr-ft²-°F
Melting Point 1390 - 1430 °C
2530 - 2610 °F
Solidus 1390 °C
2530 °F
Liquidus 1430 °C
2610 °F
Component Elements Properties Metric English Comments
Aluminum, Al 0.90 - 1.5 %
0.90 - 1.5 %
Carbon, C <= 0.10 %
<= 0.10 %
Chromium, Cr 14 - 17 %
14 - 17 %
Copper, Cu <= 0.50 %
<= 0.50 %
Iron, Fe 5.0 - 9.0 %
5.0 - 9.0 %
Manganese, Mn <= 1.0 %
<= 1.0 %
Nickel, Ni >= 70 %
>= 70 %
Including Cobalt
Niobium, Nb (Columbium, Cb) 0.70 - 1.2 %
0.70 - 1.2 %
Includes Ta
Silicon, Si <= 0.50 %
<= 0.50 %
Sulfur, S <= 0.010 %
<= 0.010 %
Titanium, Ti 2.0 - 2.6 %
2.0 - 2.6 %
Electrical Properties Metric English Comments
Electrical Resistivity 0.000122 ohm-cm
0.000122 ohm-cm
Magnetic Permeability 1.0035
1.0035
at 200 oersted (15.9 kA/m)
Curie Temperature -125 °C
-193 °F
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