Silicon Core Iron A is a magnetic core alloy with high initial permeability, low hysteresis loss in AC and DC circuits, moderate formability, and a medium electrical resistivity, yet higher than Electrical Iron. It is melted in electric arc furnaces to exacting chemical specifications and carefully controlled in rolling and annealing processes to produce a fine-grain, uniform quality magnetic core iron.
Silicon Core Iron "A-FM" contains a free-machining additive to improve its machinability especially for screw machine operations. It has been used primarily for solid cores which must be machined economically in volume.
Carbon (Nominal) 0.03
Silicon (Nominal) 1
Manganese (Nominal) 0.15
Iron (Nominal) Balance
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