Specifies minimum values for the principal magnetic properties of, and dimensional tolerances for, technically important magnetically hard materials (permanent magnets). For information purposes only, the standard provides values for the densities of the materials and the ranges of their chemical compositions. Some additional physical and mechanical reference data concerning the magnetic materials is given for information and comparison purposes. This consolidated version consists of the second edition (2001) and its amendment 1 (2004). Therefore, no need to order amendment in addition to this publication.