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Relieve all strains and restore the material to a soft condition suitable for further drawing, spinning or forming operations. High nickel alloys readily absorb carbon, sulphur, oxygen and other contaminants from combustion furnace gases, it is necessary that this process be performed in a controlled atmosphere.
Annealing for magnetic shielding must be under exact and controlled conditions. Annealing is a necessary final process to attain optimum magnetic properties of shielding alloys.