{"id":445732,"date":"2024-10-20T08:43:16","date_gmt":"2024-10-20T08:43:16","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/bs-en-iec-60404-8-12023\/"},"modified":"2024-10-26T16:14:30","modified_gmt":"2024-10-26T16:14:30","slug":"bs-en-iec-60404-8-12023","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/bsi\/bs-en-iec-60404-8-12023\/","title":{"rendered":"BS EN IEC 60404-8-1:2023"},"content":{"rendered":"

IEC 60404-8-1:2023 specifies minimum values for the principal magnetic properties of, and dimensional tolerances for, technically important permanent magnet (magnetically hard) materials. For information purposes only, this document provides values for the densities of the materials and the ranges of their chemical compositions. This fourth edition includes the following significant technical changes with respect to the previous edition: a) recently developed anisotropic REFeB hot deformed magnets and anisotropic HDDR REFeB bonded magnets are included; b) high energy Ca-La-Co ferrites stabilized by La and Co substitution are included; c) new and high-performance grades of REFeB and RE2Co17 sintered magnets and isotropic REFeN bonded magnets are added.<\/p>\n

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2<\/td>\nundefined <\/td>\n<\/tr>\n
5<\/td>\nAnnex ZA (normative)Normative references to international publicationswith their corresponding European publications <\/td>\n<\/tr>\n
7<\/td>\nFran\u00e7ais
CONTENTS <\/td>\n<\/tr>\n
10<\/td>\nFOREWORD <\/td>\n<\/tr>\n
12<\/td>\nINTRODUCTION <\/td>\n<\/tr>\n
13<\/td>\n1 Scope
2 Normative references
3 Terms and definitions <\/td>\n<\/tr>\n
14<\/td>\n4 Types of materials and their applications
5 Classification
5.1 General
Tables
Table 1 \u2013 Classification of permanent magnet (magnetically hard) materials <\/td>\n<\/tr>\n
15<\/td>\n5.2 Principal magnetic properties
5.3 Additional magnetic properties
Table 2 \u2013 Magnetic properties \u2013 Symbols and units
Table 3 \u2013 Additional magnetic properties \u2013 Symbols and units <\/td>\n<\/tr>\n
16<\/td>\n6 Chemical composition
7 Densities
8 Designation
9 Mode of shipment and dimensions <\/td>\n<\/tr>\n
17<\/td>\n10 Testing
10.1 Extent of testing
10.2 Testing methods
11 Grounds for rejection
12 Description of tables of standard properties
12.1 Magnetically hard alloys
12.1.1 Aluminium-nickel-cobalt-iron-titanium alloys (AINiCo)
Table 4 \u2013 Chemical compositions of AlNiCo alloys (% mass fraction) \u2013 for information purposes only <\/td>\n<\/tr>\n
18<\/td>\n12.1.2 Chromium-iron-cobalt alloys (CrFeCo)
Table 5 \u2013 Chemical compositions of CrFeCo alloys (% mass fraction) \u2013 for information purposes only <\/td>\n<\/tr>\n
19<\/td>\n12.1.3 Iron-cobalt-vanadium-chromium alloys (FeCoVCr)
12.1.4 Rare earth-cobalt alloys (RECo)
Table 6 \u2013 Chemical compositions of FeCoVCr alloys (% mass fraction) \u2013 for information purposes only <\/td>\n<\/tr>\n
20<\/td>\n12.1.5 Rare earth-iron-boron sintered and hot deformed magnets (REFeB)
Table 7 \u2013 Chemical compositions of RECo alloys (% mass fraction) \u2013 for information purposes only <\/td>\n<\/tr>\n
21<\/td>\n12.2 Magnetically hard ceramics (magnetically hard ferrites)
12.2.1 Chemical composition
Table 8 \u2013 Chemical compositions of REFeB sintered and hot deformed magnets (% mass fraction) \u2013 for information purposes only <\/td>\n<\/tr>\n
22<\/td>\n12.2.2 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)
12.3.1 General
12.3.2 Magnet materials <\/td>\n<\/tr>\n
23<\/td>\n12.3.3 Manufacturing method
12.3.4 Sub-classification
Table 9 \u2013 Chemical compositions of REFeN alloys for bonded magnet (% mass fraction) \u2013 for information purposes only <\/td>\n<\/tr>\n
25<\/td>\n12.3.5 Magnetic properties and densities
12.3.6 Dimensional tolerances
13 Irreversible demagnetization behaviour
13.1 General
13.2 General definition of demagnetization field strength HD <\/td>\n<\/tr>\n
26<\/td>\n13.3 Simplified definition of demagnetization field strength HD
Figures
Figure 1 \u2013 Graphic representation of B(H) and J(H) demagnetization and recoil curves <\/td>\n<\/tr>\n
28<\/td>\n14 Tables 10 to 25
Figure 2 \u2013 Simplified evaluation of B(H) and J(H) demagnetization and recoil curves <\/td>\n<\/tr>\n
29<\/td>\nTable 10 \u2013 Magnetic properties and densities of AlNiCo magnets <\/td>\n<\/tr>\n
30<\/td>\nTable 11 \u2013 Magnetic properties and densities of CrFeCo and FeCoVCr magnets <\/td>\n<\/tr>\n
31<\/td>\nTable 12 \u2013 Magnetic properties and densities of RECo sintered magnets <\/td>\n<\/tr>\n
33<\/td>\nTable 13 \u2013 Magnetic properties and densities of REFeB sintered magnets <\/td>\n<\/tr>\n
35<\/td>\nTable 14 \u2013 Magnetic properties and densities of REFeB hot deformed magnets <\/td>\n<\/tr>\n
36<\/td>\nTable 15 \u2013 Magnetic properties and densities of hard ferrites <\/td>\n<\/tr>\n
38<\/td>\nTable 16 \u2013 Magnetic properties and densities of isotropic AlNiCo bonded magnets <\/td>\n<\/tr>\n
39<\/td>\nTable 17 \u2013 Magnetic properties and densities of isotropic and anisotropic RECo bonded magnets <\/td>\n<\/tr>\n
40<\/td>\nTable 18 \u2013 Magnetic properties and densities of isotropic REFeB bonded magnets <\/td>\n<\/tr>\n
42<\/td>\nTable 19 \u2013 Magnetic properties and densities of anisotropic REFeB bonded magnets <\/td>\n<\/tr>\n
43<\/td>\nTable 20 \u2013 Magnetic properties and densities of isotropic and anisotropic hard ferrite bonded magnets <\/td>\n<\/tr>\n
44<\/td>\nTable 21 \u2013 Magnetic properties and densities of isotropic and anisotropic REFeN bonded magnets <\/td>\n<\/tr>\n
45<\/td>\nTable 22 \u2013 Dimensional tolerances (as cast or as sintered)of AlNiCo magnets
Table 23 \u2013 Dimensional tolerances of cold rolled strips of FeCoVCr and CrFeCo magnets with a maximum thickness of 6 mm and maximum width of 125 mm <\/td>\n<\/tr>\n
46<\/td>\nTable 24 \u2013 Dimensional tolerances of the diameter of cold drawn wires and bars of FeCoVCr and CrFeCo magnets <\/td>\n<\/tr>\n
47<\/td>\nTable 25 \u2013 Dimensional tolerances on hard ferrites <\/td>\n<\/tr>\n
48<\/td>\nAnnex A (informative)Physical data and mechanical reference values of AINiCo, CrFeCo, FeCoVCr, SmCo, NdFeB, hard ferrite and SmFeN bonded magnets <\/td>\n<\/tr>\n
49<\/td>\nTable A.1 \u2013 Physical data and mechanical reference values of AlNiCo, CrFeCo, FeCoVCr,SmCo, NdFeB, hard ferrite and SmFeN bonded magnets <\/td>\n<\/tr>\n
50<\/td>\nAnnex B (informative)Grain boundary diffusion (GBD) process for REFeB sintered magnets
Figure B.1 \u2013 Example of coercivity gain of GBD processed sintered REFeB magnets in dependence of the distance to the magnet surface <\/td>\n<\/tr>\n
51<\/td>\nAnnex C (informative)Cerium-iron-boron sintered magnets (CeFeB)
Figure C.1 \u2013 Manufacturing flow chart of CeFeB sintered magnets
Table C.1 \u2013 Chemical compositions of CeFeB sintered magnets (% mass fraction) <\/td>\n<\/tr>\n
52<\/td>\nBibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

Magnetic materials – Specifications for individual materials. Permanent magnet (magnetically hard) materials<\/b><\/p>\n\n\n\n\n
Published By<\/td>\nPublication Date<\/td>\nNumber of Pages<\/td>\n<\/tr>\n
BSI<\/b><\/a><\/td>\n2023<\/td>\n54<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":445742,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[2641],"product_tag":[],"class_list":{"0":"post-445732","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-bsi","8":"first","9":"instock","10":"sold-individually","11":"shipping-taxable","12":"purchasable","13":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/445732","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media\/445742"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=445732"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=445732"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=445732"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}