4J29 i le 20 ~ 450 ℃ o loʻo i ai se faʻaopoopoga laina tutusa faʻatasi ma le silicon boron tioata malo Curie point e maualuga atu, ma e iai se tulaga mautu lelei faʻalapotopotoga. O le oxide film o le alloy e mafiafia ma e mafai ona lelei

lelei infiltrated e le tioata, ma e le fegalegaleai ma mercury, faia talafeagai mo le faaaogaina i E le fegalegaleai ma mercury ma e talafeagai mo le faaaogaina i meafaifaaili o loo i ai le mercury lafoaia. O le mea autu faʻamaufaʻailoga fausaga mo masini eletise eletise.

4J32 u'amea, lea e ta'ua o le Super-Invar u'amea, o se fa'ameamea vili u'amea-nickel la'ititi fa'alautele fa'atasi ma le maualalo o le fa'alauteleina i le va o le 20-100 ° C. O le uʻamea o loʻo i ai le maualalo o le faʻalauteleina i le va o le 20-100 ° C. O le u'amea e fetaui lelei mo le fa'aoga e fai ma mea fa'amaufa'ailoga mo masini eletise eletise.

4J29 e masani ona faʻaaogaina mo vaega eletise eletise e pei o paipa, oscillator tubes, ignition tubes, magnetrons, transistors, faʻamau faʻamaufaʻailoga, relays, fesoʻotaʻiga tuʻufaʻatasia, uaea taʻitaʻia, chassis, atigi, puipui, ma isi, faʻamaufaʻailoga tioata, i le faʻaogaina o tioata ma le faʻapipiʻi e tatau ona faʻaaogaina e fetaui ma le faʻaogaina o le faʻalauteleina o le vevela ma e tusa ai ma le faʻatulagaina o le faʻatulagaina o le faʻamaualuga o le faʻatulagaina o lona maualalo-vevela, o le gaioiga e tatau ona faia i se vevela talafeagai Togafitiga e faʻamautinoa ai o loʻo i ai i mea o loʻo i ai mea lelei loloto. O mea o loʻo i ai le faʻatinoga o ata loloto lelei, pe a faʻaaogaina mea faʻapipiʻi e tatau ona matua faʻataʻitaʻiina mo le malulu o le ea.

4J32 e fetaui lelei mo le tele o meafaifa'aili, vaega o meafaifa'aili, vevela bimetallic pasif layer ma resonance cavities e manaʻomia le mautu.