MaTestLab > Test Standards > ASTM A664 Identification of Standard Flat-rolled Electrical Steel Grades
Last updated 18th March 2025
ASTM A664 Identification of Standard Flat-rolled Electrical Steel Grades
ASTM A664 is a standard practice for identifying standard grades of flat-rolled electrical steels based on specific core loss values. The practice involves a six-character protocol to designate material grades, including thickness and core loss characteristics. Specimens are first annealed by stress-relief and then cut parallel to the rolling direction. The core loss features of the specimen are determined, which help in the efficient selection of electrical steels. It has applications in transformers and motors selection. To select the best steel grade and optimal design, ASTM A664 is a must.
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ASTM A664 Introduction
ASTM A664 is based on the particular core loss values that form the basis for choosing the best flat-rolled grades of electrical steels. It outlines a holistic approach for the identification of electrical steels that meet the maximum values of specific core loss. MaTestLab is one of the best testing service providers, with the best network of testing laboratories in the USA to carry out ASTM A664 tests for our clients. This procedure is particularly designed for steel and magnetically soft irons. By using core loss measurements at specific peak values of alternating induction and frequencies, the given material is graded and selected.
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ASTM A664 testing
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ASTM A664 Test Method
The method proceeds as follows:
Apparatus Setup
Epstein specimens for core loss measurement at specific magnetic inductions and frequencies are analyzed.
Major Steps
Stress-relief annealing of specimensCutting the specimen parallel to the rolling direction
ASTM A664 Equipment and Sample Preparation
Specimen Details
The given specimens are annealed by stress relief and cut parallel to the rolling direction.
Specimen Preparation
Specific dimensions are used as per the ASTM specifications.
Specimen Dimensions
Specific dimensions as per the ASTM specifications are used.
ASTM A664 Results and Interpretation
The findings of ASTM A664 provide valuable information on the performance of the material characteristics. This data is significant for manufacturers and engineers in selecting the most suitable electrical steels for applications in electrical appliances. By using the ASTM A446 results, specialists can enhance the productivity and durability of electrical equipment in practical engineering applications.
Test Related to ASTM A664
ASTM A664 is compatible with a number of ASTM requirements, including ASTM A677, which entails the conditions to which non-oriented flat-rolled electrical steels have to conform.
Use of ASTM A664 in Various Industries
The standard is widely used in electrical steel in the energy, automotive, and electronics industries for their magnetic efficiency, supporting wind turbine generator design, and also helping in hybrid and electric vehicle component manufacturing.
Materials Commonly Tested with ASTM A664
It tests for core loss, permeability, thickness, and surface insulation resistance of non-oriented and grain-oriented electrical steels. The non-oriented alloys are widely used in rotating machines, and the grain-oriented alloys find application mainly as transformer material because they attain better magnetic performance.
Safety and Best Practices in ASTM A664 Testing
Testing requires strict safety protocols, such as calibrated equipment, proper handling of sharp-edged materials, and standardized procedures. Best practices involve consistent sample preparation, environmental conditions, and verification of equipment calibration for results.
Importance of ASTM A664
The importance of standard lies in its role of standardization in the identification and classification of electrical steel grades, which helps minimize energy losses in electrical applications, enables the development of advanced technologies, and makes global trade possible by means of widely recognized specifications.
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FAQ's
Where can I get the astm a664 tested?
You can share your astm a664 testing requirements with MaTestLab. MaTestLab has a vast network of material testing laboratories, spread across the USA and Canada. We support your all material testing needs ranging from specific astm a664 test to various testing techniques.
How much do I need to pay for the astm a664 test?
Please contact us for a detailed quote for your astm a664 testing needs. Cost incurred to carry out different astm a664 testing methodology depends on the type of raw material; number of samples, coupons, or specimens; test conditions, turn around time etc. Costs of some ASTM testing methods start from $100 and the final value depends upon the factors listed above. Please contact us for the best and latest prices.
How many samples are required for astm a664?
The required number of samples or specimens should comply with the procedure given in the astm a664 standard. However, the MaTestLab operations team can assist you for your special requirements once you share your testing details with us.
How much discount can I get on the astm a664 test?
MaTestLab has a vast testing laboratory network, hence we bring you the best testing facilities in a cost-effective way. We offer considerable discounts (15-20%) to our returning customers based on test volume and frequency.
How many days will it take to complete the astm a664 test?
The turnaround time for astm a664 test methodology depends upon the test procedure mentioned in the standard test document. However, we at MaTestLab understand your research requirements and hence try to get your test completed within the least possible time.
Where can I get the astm a664 tested?
You can share your astm a664 testing requirements with MaTestLab. MaTestLab has a vast network of material testing laboratories, spread across the USA and Canada. We support your all material testing needs ranging from specific astm a664 test to various testing techniques.
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