INCONEL 751 (UNS N07751) is a precipitation-hardening nickel-chromium alloy used primarily in exhaust valves for internal combustion engines. The alloy has essentially the same excellent physical, mechanical and corrosion resistance as INCONEL alloy X-750. Its thermal properties are very close to those of INCONEL alloy X-750.

The alloy is mainly used in the exhaust valve of internal combustion engine and the manufacture of corrosion-resistant flat wave spring, circumferential spiral spring, spiral compression spring, spring clamp and seal ring and other parts of the aircraft engine operating temperature below 540℃.