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  • ASTM
    A1102-19 Standard Specification for Sintered Samarium Cobalt (SmCo) Permanent Magnets (Redline)
    Edition: 2019
    $103.58
    Unlimited Users per year

Description of ASTM-A1102 2019

ASTM A1102-19

Redline Standard: Standard Specification for Sintered Samarium Cobalt (SmCo) Permanent Magnets




ASTM A1102

Scope

1.1 This specification covers technically important, commercially available, magnetically hard sintered (fully dense) permanent magnets commonly known as samarium cobalt. These materials are available in two general composition families abbreviated “SmCo 1:5” and “SmCo 2:17.” The numbers indicate the approximate atomic ratio of samarium to the sum of other constituents. (Refer to Appendix X3 for additional composition information.)

1.2 Samarium cobalt magnets have approximate magnetic properties of residual magnetic induction, Br, from 0.78 T (7800 G) to 1.18 T (11 800 G) and intrinsic coercivity, HcJ, typically greater than 800 kA/m (10 000 Oe). Special grades and isotropic (un-aligned) magnets can have properties outside these ranges (see Appendix X4). Specific magnetic hysteresis behavior (demagnetization curve) can be characterized using Test Method A977/A977M.

1.3 The values stated in SI units are to be regarded as standard. The values given in parentheses are mathematical conversions to customary (cgs-emu and inch-pound) units which are provided for information only and are not considered standard.

1.4 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.

1.5 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.


Keywords

coercive field strength; magnetic field strength; magnetic flux density; magnetic properties; maximum energy product; permanent magnet; residual induction; samarium cobalt magnet; sintered rare earth magnet;


ICS Code

ICS Number Code 29.100.10 (Magnetic components)


DOI: 10.1520/A1102-19

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About ASTM

ASTM International, formerly known as the American Society for Testing and Materials (ASTM), is a globally recognized leader in the development and delivery of international voluntary consensus standards. Today, some 12,000 ASTM standards are used around the world to improve product quality, enhance safety, facilitate market access and trade, and build consumer confidence. ASTM’s leadership in international standards development is driven by the contributions of its members: more than 30,000 of the world’s top technical experts and business professionals representing 150 countries. Working in an open and transparent process and using ASTM’s advanced electronic infrastructure, ASTM members deliver the test methods, specifications, guides, and practices that support industries and governments worldwide.
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