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.
