4J29 a 20 ~ 450 ℃ yana da irin wannan mizani fadada coefficient tare da silicon boron wuya gilashin Curie batu ne mafi girma, kuma yana da kyau low-zazzabi kwanciyar hankali kungiyar. Fim ɗin oxide na gami yana da yawa kuma yana iya zama da kyau

da kyau shigar da gilashin, kuma ba ya mu'amala da mercury, sa shi dace da amfani a cikin Ba ya mu'amala da mercury kuma dace da amfani a cikin kayan aiki dauke da mercury fitarwa. Ita ce babban kayan aikin hatimi don na'urorin injin injin lantarki.

4J32 alloy, wanda kuma aka sani da Super-Invar gami, ƙaramin faɗaɗɗen ƙarfe ne na hakowa na nickel tare da ƙarancin haɓakar haɓakawa a cikin kewayon 20-100 ° C. Alloy yana da ƙarancin haɓakar haɓakawa a cikin kewayon 20-100 ° C. Alloy ya dace don amfani azaman kayan tsarin rufewa don na'urorin injin injin lantarki.

4J29 ne yafi amfani da lantarki injin kayan gyara kamar watsi shambura, oscillator shambura, ƙonewa shambura, magnetrons, transistor, shãfe haske matosai, relays, hadedde da'irori, gubar wayoyi, shasi, bawo, brackets, da dai sauransu, gilashin sealing, a cikin aikace-aikace na gilashin da gami ya kamata a yi amfani da su dace da coefficient na kwanciyar hankali na fadadawa da kungiyar, bisa ga gwajin da yawan zafin jiki na fadada da kungiyar. ƙananan zafin jiki, aikin sarrafawa ya kamata a gudanar da shi a cikin zafi mai dacewa Jiyya don tabbatar da cewa kayan yana da kyawawan abubuwan da aka zana. Kayan yana da kyakkyawan aikin zane mai zurfi, lokacin amfani da kayan ƙirƙira ya kamata a gwada shi sosai don ƙarancin iska.

4J32 ya dace da kayan aiki iri-iri, sassan kayan aiki, zafi mai zafi na bimetallic m Layer da resonance cavities waɗanda ke buƙatar kwanciyar hankali mai girma.