4J36 ( Alloy Mgbasawanye ) (Aha a na-ahụkarị: Invar, FeNi36, Invar Standard, Vacodil36)
4J29 (Alloy Mgbasawanye) (Aha a na-ahụkarị: Kovar, Nilo K, KV-1, Dilver Po, Vacon 12)
4J42 alloy bụ tumadi mejupụtara ígwè, nickel ọcha. A na-eji ọnụọgụ ọnụọgụ nke mgbasawanye mara ya. Welite ọnụọgụ mgbasawanye ọkụ yana ebe Curie na mmụba nke ọdịnaya nickel.