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Electrical steel standard for EVs in works

Keywords: Tags  ASTM International, electrical steel standard, thin lamination, electric vehicles, material properties, Steve Sprague, Corinna Petry

CHICAGO — A new standard to cover thin steel laminations used to increase the energy efficiency of electric and hybrid-electric vehicles (EVs), advanced electrical features on aircraft, power generators and military systems is being developed by ASTM International’s Magnetic Properties Committee.

A material specifications subcommittee is working on the "Specification for Thin-Gauge Fully Processed Non-Oriented Electrical Steel" (ASTM WK35463).

The work group develops and maintains standards covering the grades, properties and test methods of magnetic materials used in electromagnetic systems, from motors and generators to transformers, solenoids and sensors.

The proposed standard will govern a class of very thin silicon-iron electrical steel not previously covered, and will standardize existing material designations now based on commercial trade names, giving manufacturers and consumers confidence in the material properties’ consistency.

"Anyone using this class of material must now either rely on published information from producers or perform their own internal tests to establish and verify this steel class’ properties," subcommittee spokesman Steve Sprague said.

Once the standard is in place, electrical steel manufacturers and users interested in specifying the material in their designs "will have a point of common understanding, terminology and communication regarding their properties and will be able to effect quicker design solutions and better manage manufacturing and supply chain challenges," he said.

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