I-4J42 yi-iron-nickel fixed expansion alloy, eyenziwe kakhulu yi-iron (Fe) kunye ne-nickel (Ni), enomxholo we-nickel omalunga ne-41% ukuya kwi-42%. Ukongeza, ikwaqulathe inani elincinci lezinto ezilandelelanayo ezifana ne-silicon (Si), i-manganese (Mn), i-carbon (C), kunye ne-phosphorus (P). Le khemikhali ikhethekileyo...
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