ASTM A1070-16(2022) PDF

Scope: 1.1 This specification covers technically important, commercially available, magnetically hard, cast and sintered permanent magnets known commonly as Alnico. 1.2 Alnico magnets have approximate magnetic properties of residual magnetic induction, Br, from 0.52 T (5200 G) to 1.35 T (13500 G) and coercivity, HcB, from 38 kA/m (475 Oe) to 175 kA/m (2200 Oe). Their specific magnetic hysteresis behavior (demagnetization curves) 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.

ASTM A1070-16(2022) Referenced Document

ASTM A340 Standard Terminology of Symbols and Definitions Relating to Magnetic Testing
ASTM A977/A977M Standard Test Method for Magnetic Properties of High-Coercivity Permanent Magnet Materials Using Hysteresigraphs

2022 ASTM A1070-16(2022) Standard Specification for Cast and Sintered Alnico Permanent Magnets
2016 ASTM A1070-16 Standard Specification for Cast and Sintered Alnico Permanent Magnets