Inconel 751 (UNS N07751)

Inconel 751 (UNS N07751) is a precipitation hardenable nickel-chromium alloy, used mainly for the exhaust valves of internal combustion engines. Its thermal properties correspond closely to those published for INCONEL alloy X-750.

Equivalent Grades

Inconel 751Inconel 751N07751

Chemical Composition, %

Inconel 751≤0.10≤0.50≤1.0≤0.02≤0.0114.0-17.0≥700.7-1.20.9-1.52.0-2.6≤0.505.0-9.0

Typical Physical and Mechanical Properties (RT, Solution annealed)

Density, g/cm3Melting Point, ℃Tensile Strength, MPaYield Strength, MPaELongation, %Hardness, HRB

Available Products and Specifications

Rod, Bar, Wire and Forgings
Plate, Sheet and Strip
Pipe and Tube
Welding Product


The alloy has essentially the same excellent physical, mechanical and corrosion-resistance properties as INCONEL alloy X-750.


In the evaluation of materials for exhaust valve applications, nickel-chromium alloys have performed well in a 1675°F (913°C) lead oxide screening test. INCONEL alloy 751 repeatedly offered good results, with corrosion rates averaging 4.31 g/dm2/h. Like other nickel-chromium alloys, INCONEL alloy 751 also resists attack by other exhaust stream impurities such as sulfur, bromine and chlorine.