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

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 in which the stamped laminations or assembled core structures for electrical equipment are annealed to develop the desired core loss and permeability characteristics. | Designation A726 05 Reapproved 2010 Standard Specification for Cold-Rolled Magnetic Lamination Quality Steel Semiprocessed Types1 This standard is issued under the fixed designation A726 the number immediately following the designation indicates the year of original adoption or in the case of revision the year of last revision. A number in parentheses indicates the year of last reapproval. A superscript epsilon indicates an editorial change since the last revision or reapproval. 1. Scope Wattmeter-Ammeter-Voltmeter Method and 25-cm Ep- This specification covers cold-rolled carbon sheet steel stein Test Frame used for magnetic applications. These products commonly A370 Test Methods and Definitions for Mechanical Testing called cold-rolled magnetic lamination steel CRML are of Steel Products usually intended for applications in which the stamped lami- A664 Practice for Identification of Standard Electrical Steel nations or assembled core structures for electrical equipment Grades in ASTM Specifications are annealed to develop the desired core loss and permeability A700 Guide for Packaging Marking and Loading Methods characteristics. for Steel Products for Shipment E18 Test Methods for Rockwell Hardness of Metallic Ma- By using appropriate lamination annealing practices the terials user can optimize magnetic properties for the various types. E140 Hardness Conversion Tables for Metals Relationship Non-guaranteed core-loss types usually made to con- Among Brinell Hardness Vickers Hardness Rockwell trolled chemical compositions are available but are not cov- Hardness Superficial Hardness Knoop Hardness Sclero- ered by this specification. scope Hardness and Leeb Hardness Higher quality core-loss types are made to controlled chemical compositions and are usually given a critical reduc- 3. Terminology tion on a temper-mill to yield specified magnetic properties Definitions of Terms Specific to This Standard after a suitable lamination anneal. These products .