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Standard Test Methods for Permeability of Weakly Magnetic Materials
Přeložit název
NORMA vydána dne 1.2.2021
Označení normy: ASTM A342/A342M-21
Datum vydání normy: 1.2.2021
Kód zboží: NS-1017137
Počet stran: 8
Přibližná hmotnost: 24 g (0.05 liber)
Země: Americká technická norma
Kategorie: Technické normy ASTM
Keywords:
magnetic balances, magnetic probes, magnetic susceptibility, NDE, nondestructive evaluations, paramagnetic, permeability, permeameters, vibrating sample magnetometers,, ICS Number Code 29.030 (Magnetic materials)
Significance and Use | ||||
3.1?This test method is suitable for specification acceptance, design purposes, service evaluation, regulatory statutes, manufacturing control, and research and development. 3.2?Because of the restrictions on the specimen shape and size, this test method is most often used to evaluate semifinished product before fabrication of parts. |
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1. Scope | ||||
1.1?These test methods cover four procedures for determination of the permeability [relative permeability]1.2?The test methods covered are as follows: 1.2.1?Test Method 11.2.2?Test Method 21.2.3?Test Method 31.2.4?Test Method 41.2.5?Test Method 51.3?Materials typically tested by these methods such as austenitic stainless steels may be weakly ferromagnetic. That is, the magnetic permeability is dependent on the magnetic field strength. As a consequence, the results obtained using the different methods may not closely agree with each other. When using Methods 1 and 5, it is imperative to specify the magnetic field strength or range of magnetic field strengths at which the permeabilities have been determined. 1.4?The values and equations stated in customary (cgs-emu and inch-pound) or SI units are to be regarded separately as standard. Within this standard, SI units are shown in brackets except for the sections concerning calculations where there are separate sections for the respective unit systems. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with this standard. 1.5?This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.6?This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. |
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2. Referenced Documents | ||||
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