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

TrademarkGBGOSTASTMUNSDINW.Nr.NFBSJISSS
Inconel 751Inconel 751N07751

Chemical Composition, %

AlloyCSiMnPSCrNi+CoNb+TaAlTiCuFe
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
8.221390-1430131096522/

Available Products and Specifications

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

Features

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

Applications

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.