ASTM A677 Standard Specification for Non-oriented Electrical Steel Fully Processed Types
ASTM A677 is a test method that determines the requirements to which flat-rolled non-oriented fully processed electrical steel shall conform. The steel is produced as per specified maximum core loss values.
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Introduction to ASTM A677
ASTM A677 is a test method designed to determine the requirements for flat rolled non-oriented electrical steel fully processed types. The steel is produced as per the specified core loss values and is intended for use in magnetic devices primarily for commercial power frequencies of 50 and 60 Hz. The results obtained through this method are specially used for quality control, reliability check, performance evaluation, and specification purposes.
ASTM A677 test method is generally applicable to fully processed types of electrical steel such as flat rolled soft irons, low-carbon steels, and alloys of iron with silicon and aluminium. The desirable core loss and permeability characteristics are developed during mill processing. The final values of the procedure are stated in standard units of SI.
ASTM A677 Test Method
This test method proceeds by determining the core loss grade and the density of the materials under examination is specified. The materials are tested for specifications and a proper report of the core loss values is generated. The producer submits to the user after the shipment with a certified report to confirm that the material conforms to the specified standards.
Test procedure for determining properties
The specimen is tested for its density and the mechanical, physical, magnetic, and surface insulation characteristics of the specimen are specified through repeated examinations.
Creating test report
A certified report is generated stating the core loss values and other required values that could stand for the specificity of the specimen. The report serves as the certificate of a specimen being durable and reliable for particular applications.
ASTM A677 Specimens
Specimen details
Non-oriented fully processed electrical steels are low-carbon, silicon-iron, or silicon-aluminum-iron alloys containing up to about 3.5 % silicon and a small amount of aluminum.
Specimen dimensions
The acceptable specimen thickness for ASTM A677 is in mm (in.) and can be one of the following: 0.36 (0.0140), 0.47 (0.0185), or 0.64 (0.0250).
Specimen preparation
Specimens are injection molded or cut from molded or extruded sheets or plates.
ASTM A677 Results
This test method evaluates electrical steels by determining their magnetic properties such as specific core loss, permeability, specific exciting power, and magnetic aging. The surface insulation characteristics are also determined. Mechanical and physical properties are also determined such as hardness, ductility, and lamination factor.
Tests related to ASTM A677
ASTM A664 is similar to ASTM A677 and covers the procedure for designating standard grades of flat-rolled electrical steels made to specified maximum values of core loss. This practice is applicable to soft irons, low carbon steels, alloys of iron with silicon, aluminium, and so forth, where a core loss measurement at a stated peak value of altering induction and a stated frequency is used to grade the material.
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