Standard Specification for Cold-Rolled Magnetic Lamination Quality Steel, Semiprocessed Types

1.1 This specification covers cold-rolled carbon sheet steel used for magnetic applications. These products, commonly called "cold-rolled magnetic lamination steel" (CRML) are usually intended for applications where the stamped laminations or assembled core structures for electrical equipment are annealed to develop the desired core loss and permeability characteristics.

1.2 By using appropriate lamination annealing practices, the purchaser can optimize magnetic properties for the various types.

1.3 A non-guaranteed core-loss type is usually made to controlled chemical composition. However, magnetic properties are not guaranteed by the producer.

1.4 Higher quality core-loss types are made to controlled chemical composition and are usually given critical reduction on a temper mill to yield specified magnetic properties after a suitable lamination anneal. These products, typically called semiprocessed lamination steel, are classified by the ASTM Code Letter D in accordance with Specification A664.

1.5 The values stated in inch-pound, cgs, and em units are to be regarded as standard.