Shanghai LANZHU super alloy Material Co., Ltd.


Nickel alloy718 bolt
Release time: 2021-07-09 13:09:07  Hits: 174


An age hardened nickel-chromium-based superalloy, In718 bolts are ideal for extreme environments that require oxidation and corrosion resistant bolts, even when subjected to pressure and heat. Twice as strong as In625 bolts, 718 bolts are renowned for its high yield strength and usability to 1800°F. Often selected by industry for their high temperature strength capabilities, In718 bolts also deliver strength and ductility at cryogenic temperatures.

Also known as alloy 718, In718 bolts are a precipitation hardened (also called age hardened) form of In625. This heating and quenching process is used to change the alloy’s atomic structure, making it stronger by locking the metal's grain structure in place. Additional strength could be gained by cold working.

Corrosion resistance

Similar to its 625 counterpart, In718 bolts offer excellent resistance due to their nickel-chromium content, even combating chloride-ion stress-corrosion cracking.The nickel in alloy 718 helps provide resistance to many inorganic and organic compounds throughout wide ranges of acidity and alkalinity, with the exception of strongly oxidizing compounds. It's chromium content enables it to withstand sulfur compounds and mild oxidizing media, while molybdenum helps prevent pitting. Key corrosion resistance attributes of In718 include:

· Highly resistant to chloride and sulfide stress corrosion cracking.

· Excellent resistance to H2S, CO2, chloride, and sour gas environments.

· Resistant to aqueous corrosion.

· Provides protection in oil & gas drilling environements at high temperatures.


Inconel 718 bolts in Action: Extreme Applications

· Natural gas processing where contaminants such as H2S and CO2 are present

· Aerospace also uses Inconel 718 bolts for liquid oxygen turbo-pumps, gas turbine engines and airframe parts

· Down-hole oil shafts and wellhead parts

· Chemical processing

· High temperature applications like steam generators and nuclear pressurized water reactors

· Cryogenic tanks 


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