This part of IEC 404 specifies the methods used for determining the density, resistivity
and stacking factor of electrical steel sheet and strip. These quantities are necessary to
establish the magnetic characteristics of the material. In particular, the density is necessary to
allow specified values of the flux density to be set without knowing the thickness of the test
specimen.
For the determination of the density, the immersion method was earlier considered to be
a fundamental method for use in cases of arbitration. However, experience has shown
that this method is very difficult to use in the case of sheet samples with a relatively
large surface area. This method is therefore not included. It is described in ISO 2738 and ISO
1183.
BS EN 60404-13:2007 Referenced Document
ISO 1183:1987 Plastics; Methods for determining the density and relative density of non-cellular plastics
ISO 2738:1987 Permeable sintered metal materials; Determination of density, oil content, and open porosity
BS EN 60404-13:2007 history
2007BS EN 60404-13:2007 Magnetic materials - Methods of measurement of density, resistivity and stacking factor of electrical steel sheet and strip
1996BS 6404-13:1996 Magnetic materials - Methods of measurement of density, resistivity and stacking factor of electrical steel sheet and strip