4J42 uaeaose u'amea fa'alautele fa'atonu-pulea sa'o e fa'atatau i le u'amea ma le 42% nickel. E fa'ainisinia e fa'afetaui lelei le fa'alauteleina o le vevela o tioata borosilicate ma isi mea fa'apipi'i, ma avea ai ma filifiliga lelei mo fa'amaufa'ailoga fa'amau, afifiina fa'aeletoroni, ma fa'aoga aerospace.
Nikeli (Ni): ~42%
Uamea (Fe): Paleni
Elemene laiti: Mn, Si, C (su'ega aofa'i)
CTE (Coefficient of Thermal Expansion, 20–300°C):~5.5–6.0 × 10⁻⁶ /°C
Malosi:~8.1 g/cm³
Tete'e eletise:~0.75 μΩ·m
Malosi o le Tensile:≥ 430 MPa
Meatotino maneta:Maneta vaivai, maualalo le fa'amalosi
Diamita: 0.02 mm - 3.0 mm
Lau'ele'ele: Malamalama, leai se oxide
Fomu: Spool, coil, tipi-i-umi
Tulaga: Fa'apipi'i po'o le toso malulu
Fa'asinomaga: Avanoa pe a talosaga
Fa'afetaui le fa'alauteleina o le vevela mo tioata ma sima
Fa'ainisinia mautu ma mea fa'amaneta
Lelei le fetaui lelei
Lelei mo le fa'amaufa'ailoga fa'aeletonika, fa'asolo, ma ta'ita'i fa'alogo
Faʻalautele maualalo ma le lelei ductility ma weldability
Fa'amaufa'ailoga mata'iata-i-u'amea
Fa'avaa ta'ita'i Semiconductor
Ulutala fa'aeletonika
Infrared ma vacuum sensors
Feso'ota'iga masini ma afifiina
Feso'ota'i va'alele ma pa puipui