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More A These electrical steels are low-carbon, silicon iron, or silicon-aluminum-iron alloys that may be made by basic-oxygen, electric-furnace, or other steelmaking practice. Desirable core-loss and permeability characteristics are developed during mill processing, so additional heat treatment is usually not necessary.

For melting and casting of the electrical steel, the typical content of the chemical elements: carbon, silicon, aluminum, sulfur, manganese, phosphorus, copper, nickel, chromium, molybdenum, antimony, and tin, are given. The processing sequence for the electrical steel comprises hot-rolling, annealing, pickling, cold-rolling, and decarburizing annealing.

The electrical steel shall conform to the specified magnetic properties including: specific core loss, permeability, specific exciting power, and magnetic aging. For surface insulation, the electrical steels shall be supplied with a smooth surface finish and a thin, tightly adherent surface oxide, or applied coatings if needed. The specified thickness and mechanical requirements such as lamination factor, ductility, and hardness are given. Test methods to determine the magnetic and mechanical properties including Epstein test and bend test are detailed.

This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application.

ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date. Scope 1. Desirable core-loss and permeability characteristics are developed during mill processing, so additional heat treatment by the user is usually not necessary. The values given in parentheses are mathematical conversions to customary cgs-emu and inch-pound units which are provided for information only and are not considered standard.


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