ASTM International Standard Specification for Nonoriented Electrical Steel, Semiprocessed Types [Metric] (Withdrawn 1999) ASTM A683M-91

1.1 This specification covers the detailed requirements to which flat-rolled, nonoriented semiprocessed electrical steel shall conform. 1.2 This steel is produced to specified maximum core-loss values and is intended primarily for commercial power frequency (50 and 60 Hz) applications in magnetic devices. Desirable core-loss and permeability characteristics are developed by further heat treatment by the purchaser. 1.3 These nonoriented semiprocessed electrical steels are low carbon, silicon-iron or silicon-aluminum-iro n alloys containing up to about 3.5% silicon and a small amount of aluminum. Note-This specification is the metric companion to Specification A683.