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BS EN IEC 60404-8-1:2023 - TC Tracked Changes. Magnetic materials - Specifications for individual materials. Permanent magnet (magnetically hard) materials, 2023
- A-30433557.pdf [Go to Page]
- undefined
- Annex ZA (normative)Normative references to international publicationswith their corresponding European publications
- Français [Go to Page]
- CONTENTS
- FOREWORD
- INTRODUCTION
- 1 Scope
- 2 Normative references
- 3 Terms and definitions
- 4 Types of materials and their applications
- 5 Classification [Go to Page]
- 5.1 General
- Tables [Go to Page]
- Table 1 – Classification of permanent magnet (magnetically hard) materials
- 5.2 Principal magnetic properties
- 5.3 Additional magnetic properties
- Table 2 – Magnetic properties – Symbols and units
- Table 3 – Additional magnetic properties – Symbols and units
- 6 Chemical composition
- 7 Densities
- 8 Designation
- 9 Mode of shipment and dimensions
- 10 Testing [Go to Page]
- 10.1 Extent of testing
- 10.2 Testing methods
- 11 Grounds for rejection
- 12 Description of tables of standard properties [Go to Page]
- 12.1 Magnetically hard alloys [Go to Page]
- 12.1.1 Aluminium-nickel-cobalt-iron-titanium alloys (AINiCo)
- Table 4 – Chemical compositions of AlNiCo alloys (% mass fraction) – for information purposes only [Go to Page]
- 12.1.2 Chromium-iron-cobalt alloys (CrFeCo)
- Table 5 – Chemical compositions of CrFeCo alloys (% mass fraction) – for information purposes only [Go to Page]
- 12.1.3 Iron-cobalt-vanadium-chromium alloys (FeCoVCr)
- 12.1.4 Rare earth-cobalt alloys (RECo)
- Table 6 – Chemical compositions of FeCoVCr alloys (% mass fraction) – for information purposes only [Go to Page]
- 12.1.5 Rare earth-iron-boron sintered and hot deformed magnets (REFeB)
- Table 7 – Chemical compositions of RECo alloys (% mass fraction) – for information purposes only
- 12.2 Magnetically hard ceramics (magnetically hard ferrites) [Go to Page]
- 12.2.1 Chemical composition
- Table 8 – Chemical compositions of REFeB sintered and hot deformed magnets (% mass fraction) – for information purposes only [Go to Page]
- 12.2.2 Manufacturing method
- 12.2.3 Sub-classification
- 12.2.4 Magnetic properties and densities
- 12.2.5 Dimensional tolerances
- 12.3 Bonded magnetically hard materials (Bonded magnets) [Go to Page]
- 12.3.1 General
- 12.3.2 Magnet materials
- 12.3.3 Manufacturing method
- 12.3.4 Sub-classification
- Table 9 – Chemical compositions of REFeN alloys for bonded magnet (% mass fraction) – for information purposes only [Go to Page]
- 12.3.5 Magnetic properties and densities
- 12.3.6 Dimensional tolerances
- 13 Irreversible demagnetization behaviour [Go to Page]
- 13.1 General
- 13.2 General definition of demagnetization field strength HD
- 13.3 Simplified definition of demagnetization field strength HD
- Figures [Go to Page]
- Figure 1 – Graphic representation of B(H) and J(H) demagnetization and recoil curves
- 14 Tables 10 to 25 [Go to Page]
- Figure 2 – Simplified evaluation of B(H) and J(H) demagnetization and recoil curves
- Table 10 – Magnetic properties and densities of AlNiCo magnets
- Table 11 – Magnetic properties and densities of CrFeCo and FeCoVCr magnets
- Table 12 – Magnetic properties and densities of RECo sintered magnets
- Table 13 – Magnetic properties and densities of REFeB sintered magnets
- Table 14 – Magnetic properties and densities of REFeB hot deformed magnets
- Table 15 – Magnetic properties and densities of hard ferrites
- Table 16 – Magnetic properties and densities of isotropic AlNiCo bonded magnets
- Table 17 – Magnetic properties and densities of isotropic and anisotropic RECo bonded magnets
- Table 18 – Magnetic properties and densities of isotropic REFeB bonded magnets
- Table 19 – Magnetic properties and densities of anisotropic REFeB bonded magnets
- Table 20 – Magnetic properties and densities of isotropic and anisotropic hard ferrite bonded magnets
- Table 21 – Magnetic properties and densities of isotropic and anisotropic REFeN bonded magnets
- Table 22 – Dimensional tolerances (as cast or as sintered)of AlNiCo magnets
- Table 23 – Dimensional tolerances of cold rolled strips of FeCoVCr and CrFeCo magnets with a maximum thickness of 6 mm and maximum width of 125 mm
- Table 24 – Dimensional tolerances of the diameter of cold drawn wires and bars of FeCoVCr and CrFeCo magnets
- Table 25 – Dimensional tolerances on hard ferrites
- Annex A (informative)Physical data and mechanical reference values of AINiCo, CrFeCo, FeCoVCr, SmCo, NdFeB, hard ferrite and SmFeN bonded magnets [Go to Page]
- Table A.1 – Physical data and mechanical reference values of AlNiCo, CrFeCo, FeCoVCr,SmCo, NdFeB, hard ferrite and SmFeN bonded magnets
- Annex B (informative)Grain boundary diffusion (GBD) process for REFeB sintered magnets [Go to Page]
- Figure B.1 – Example of coercivity gain of GBD processed sintered REFeB magnets in dependence of the distance to the magnet surface
- Annex C (informative)Cerium-iron-boron sintered magnets (CeFeB) [Go to Page]
- Figure C.1 – Manufacturing flow chart of CeFeB sintered magnets
- Table C.1 – Chemical compositions of CeFeB sintered magnets (% mass fraction)
- Bibliography [Go to Page]
