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
Trademark | GB | GOST | ASTM | UNS | DIN | W.Nr. | NF | BS | JIS | SS |
Inconel 751 | – | – | Inconel 751 | N07751 | – | – | – | – | – | – |
Chemical Composition, %
Alloy | C | Si | Mn | P | S | Cr | Ni+Co | Nb+Ta | Al | Ti | Cu | Fe |
Inconel 751 | ≤0.10 | ≤0.50 | ≤1.0 | ≤0.02 | ≤0.01 | 14.0-17.0 | ≥70 | 0.7-1.2 | 0.9-1.5 | 2.0-2.6 | ≤0.50 | 5.0-9.0 |
Typical Physical and Mechanical Properties (RT, Solution annealed)
Density, g/cm3 | Melting Point, ℃ | Tensile Strength, MPa | Yield Strength, MPa | ELongation, % | Hardness, HRB |
8.22 | 1390-1430 | 1310 | 965 | 22 | / |
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.