BS EN 10331:2003 – Magnetic materials — Specification for sintered soft magnetic materials
1 Scope
This European Standard specifies some magnetic and mechanical properties of sintered soft magnetic metals which are used for components made by a powder metallurgical process only.
This standard does not apply to magnetically soft castings or to semi-finished products.
2 Normative references
This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text, and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies (including amendments).
prEN 10281, Magnetic materials – Methods of measurement of the magnetic properties of isotropic nickel-iron soft magnetic alloys, types E1, E3 and E4.
EN 24498-1, Sintered metal materials, excluding hardmetals – Determination of apparent hardness – Part 1:Materials of essentially uniform section hardness (ISO 4498-1:1990)
IEC 60050-121:1998, International Electrotechnical Vocabulary (IEV) – Chapter 121: Electromagnetism.
IEC 60050-221:1990, International Electrotechnical Vocabulary (IEV) – Chapter 221: Magnetic materials and components.
EN ISO 2738, Sintered metal materials, excluding hardmetals – Permeable sintered metal materials – Determination of density, oil content and open porosity (ISO 2738:1999).
ISO 3369, Impermeable sintered metal materials and hardmetals – Determination of density.
ISO 4498-2, Sintered metal materials, excluding hardmetals – Determination of apparent hardness – Part 2: Case- hardened ferrous materials, surface enriched by carbon or carbon and nitrogen
ISO 5755, Sintered metal materials – Specifications.
3 Terms and definitions
For the purposes of this European Standard, the terms and definitions given in IEC 60050-121:1998 and IEC 60050-221:1990, and the following apply:
3.1
sintered density,
quotient of mass m and volume V of the sintered structural part (including pores) :
NOTE The sintered density ρ s , given in equation (1) in grammes per cubic centimetres, is calculated from m in grammes and V in cubic centimetres.
3.2 porosity,
P s
content of pores relative to the total volume of the part in volume per cent
NOTE 1 Porosity of the sintered metal with the sintered density is calculated as follows:
BS EN 10331:2003 – Magnetic materials — Specification for sintered soft magnetic materials