In general, steel materials and inspired by pure metal alloy of iron - silicon is usually the magnetic permeabilities. In conditions of low intensity magnetic low. But magnetic materials will not cause much trouble. When using the internal power supply because it is often used in a manner that is put into a magnetic field. However, for various communication tools that have a high sensitivity for the detection or transmission usually requires a magnetic alloy such as nickel - steel with the magnetic permeabilities. In conditions of high intensity magnetic low. Composites, metals, nickel and iron are divided chest has two major types of alloy Ni 50% and Ni 79% alloy Ni 50% to the magnetic permasbilities medium and the saturation induction higher metal parts. Ni is mixed with 79% to the value satilation induction under these alloys are commonly used in audio and transformer, relays, etc.
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