Lork Group high-quality Inconel 751 (UNS N07751) is a precipitation hardenable nickel-chromium alloy, used mainly for the exhaust valves of internal combustion engines.

Lork Group high-quality 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 x750.

The hot working range for Inconel 751 is 1800- 2200°F (980-1205°C). The alloy should be reheated to 2200°F (1205°C) whenever its temperature falls below 1800°F (980°C).

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 751 repeatedly offered good results, with corrosion rates averaging 4.31 g/dm2/h. Like other nickel-chromium alloys, also resists attack by other exhaust stream impurities such as sulfur, bromine and chlorine.

Inconel 751 is readily machined in the as-hot finished condition. The best procedure is to machine to slightly oversize, precipitation heat treat, then finish to size. A slight permanent contraction (about 0.0003 in/in) takes place during precipitation. Precipitation treated material can be finish machined to fine finishes and close tolerances, and will have good dimensional stability.

• Excellent resistance to chloride pitting and crevice corrosion cracking
• lmmune to Chloride ion stress corrosion
• Maintains high strength at elevated temperatures
• Resistant to sea water, in both flowing and stagnant condition
• Heat resistant

Round bar & Forgings

• Marine engineering
• Furnaces & gas turbines
• Chemical processing plants
• Boiler & pressure vessels
• Nuclear power plants

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