Special Metals INCONEL® Alloy 751

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Special Metals INCONEL® Alloy 751
Categories:	Metal; Nonferrous Metal; Nickel Alloy; Superalloy
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.
Key Words:	Nickel-Chromium Alloy; UNS N07751
Vendors:	Visit metalmen for your metals needs. Products include special chemistry, tight tolerances, custom tempers, odd dimensions/forms, and small quantities. Phone 1-800-767-9494. Click here to view all available suppliers for this material. Please click here if you are a supplier and would like information on how to add your listing to this material.
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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 0.2 %	127000 psi @Strain 0.2 %	Precipitation Hardened. Value at room temperature
	760 MPa @Strain 0.2 %, Temperature 650 °C	110000 psi @Strain 0.2 %, 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.
Rupture Strength	96.5 MPa @Temperature 816 °C, Time 3.60e+6 sec	14000 psi @Temperature 1500 °F, Time 1000 hour
	193 MPa @Temperature 816 °C, Time 360000 sec	28000 psi @Temperature 1500 °F, Time 100 hour
	276 MPa @Temperature 649 °C, Time 3.60e+6 sec	40000 psi @Temperature 1200 °F, Time 1000 hour
	476 MPa @Temperature 649 °C, Time 360000 sec	69000 psi @Temperature 1200 °F, Time 100 hour

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

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 %

Some of the values displayed above may have been converted from their original units and/or rounded in order to display the information in a consistent format. Users requiring more precise data for scientific or engineering calculations can click on the property value to see the original value as well as raw conversions to equivalent units. We advise that you only use the original value or one of its raw conversions in your calculations to minimize rounding error. We also ask that you refer to MatWeb's terms of use regarding this information. Click here to view all the property values for this datasheet as they were originally entered into MatWeb.

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NINC36 / 17405

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