ASTM A348/A348M
Standard Test Method for Alternating Current Magnetic Properties of Materials Using the Wattmeter-Ammeter-Voltmeter Method, 100 to 10 000 Hz and 25-cm Epstein Frame
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About This Item
ASTM A348/A348M is a test method for measuring alternating current magnetic properties of materials using the wattmeter-ammeter-voltmeter method, with testing at 100 to 10,000 Hz and in a 25-cm Epstein frame. It provides a standardized way to evaluate magnetic behavior under defined conditions, helping users compare results more reliably across materials and test programs. For purchasing, quality control, and engineering work, ASTM A348/A348M supports consistent magnetic property assessment where AC performance matters.
Overview of ASTM A348/A348M
This standard focuses on a specific laboratory method for determining AC magnetic properties by combining wattmeter, ammeter, and voltmeter measurements. Its title indicates both the frequency range and the use of a 25-cm Epstein frame, which gives important context for how testing is performed and interpreted. ASTM A348/A348M is therefore useful for organizations that need a recognized technical reference for comparing magnetic materials under controlled alternating-current conditions and for documenting test results in a consistent format.
Common use cases of ASTM A348/A348M
This standard is commonly used when testing magnetic materials in controlled laboratory or quality assurance settings, especially where alternating-current performance must be measured across the stated frequency range. It may support product qualification, incoming inspection, material comparison, and supplier documentation for electrical or magnetic material evaluations. In practice, ASTM A348/A348M is relevant to workflows that rely on Epstein-frame testing and repeatable electrical measurements to characterize material behavior.
Benefits of using ASTM A348/A348M
Using ASTM A348/A348M helps create consistent test conditions and clearer comparison between materials, which can reduce ambiguity in procurement and engineering decisions. It also supports compliance efforts by aligning testing with a recognized ASTM method rather than an informal in-house approach. For teams focused on quality control, the standard can improve repeatability, reduce testing disputes, and make magnetic property data easier to document, review, and reference over time.
- AC magnetic property testing
- 100 to 10,000 Hz measurement range
- 25-cm Epstein frame method
- Wattmeter-ammeter-voltmeter approach
- Repeatable material comparison
- Publication Date: 2021-06-10
- Publisher: ASTM
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