Invar 36 nickel-iron ne, ƙarancin faɗaɗa gami da ke ƙunshe da 36% nickel kuma yana da ƙimar haɓakar zafi kusan kashi ɗaya bisa goma na carbon karfe. Alloy 36 yana kula da ma'auni kusan akai-akai akan kewayon yanayin yanayin yanayi na yau da kullun, kuma yana da ƙarancin haɓakar haɓakawa daga yanayin zafi na cryogenic zuwa kusan 500°F. Wannan nau'in ƙarfe na nickel yana da tauri, mai yawa kuma yana riƙe da ƙarfi mai kyau a yanayin zafi na cryogenic.

Ana amfani da Invar 36 musamman don:

• Gudanar da jirgin sama
• Na gani & Laser tsarin
• Rediyo & na'urorin lantarki
• Haɗe-haɗe kayan aikin ƙirƙira & mutu
• Abubuwan da ake kira cryogenic