IEC 60404-1 :2000 pdf download-Magnetic materials – Part 1: Classification

01-18-2022 comment

IEC 60404-1 :2000 pdf download-Magnetic materials – Part 1: Classification.
2.2.1.3 Applications principales Ces matériaux sont utilisés pour de gros aimants à courant continu pour lesquels aucune résistance mécanique n’est requise par exemple aimants de déviation dans des cyclotrons et pour des applications dans les relais. 2.2.2 Classe B.2 – Produits plats 2.2.2.1 Généralités Ces matériaux sont couverts par la CEI 60404-8-3, la CEI 60404-8-4 et la CEI 60404-8-1 0. 2.2.2.1.1 Composition chimique Le constituant de base de ces matériaux est le fer contenant, en dehors des impuretés inévitables, de faibles teneurs en autres éléments qui peuvent provenir d’additions nécessaires au cours du processus de fabrication. La teneur en éléments d’alliage est limitée à celle d’un acier non allié tel que défini dans l’ISO 4948-1 , en particulier la teneur en Si est inférieure à 0,5 %. Ces matériaux peuvent subir un traitement de recuit après poinçonnage afin d’accroître leurs caractéristiques magnétiques. 2.2.2.1 .2 Base de sous-classification La sous-classification recommandée est fondée soit sur les pertes totales spécifiques qui sont fonction de l’épaisseur et sont habituellement mesurées à une polarisation magnétique de 1 ,5 T et aux fréquences industrielles courantes ou (pour les applications dans les relais) sur la coercitivité.
2.2.1.3 Main applications The materials are used for large d.c. magnets where no mechanical strength is required, for example deflection magnets in elementary particle physics and for relay applications. 2.2.2 Class B.2 – Flat material 2.2.2.1 General These materials are covered by IEC 60404-8-3, IEC 60404-8-4 and IEC 60404-8-1 0. 2.2.2.1.1 Chemical composition The basic constituent of these materials is iron containing unavoidable impurities, together with a low level of other elements which may arise from additions necessitated during the manufacturing process. The amount of alloying elements is limited to that of non-alloy steel as defined in ISO 4948-1 , in particular silicon is less than 0,5 %. These materials can have an annealing treatment after punching to enhance their magnetic properties. 2.2.2.1 .2 Basis of subclassification The recommended subclassification is based either on the specific total loss which is a function of thickness and is normally measured at a magnetic polarization value of 1 ,5 T and at normal industrial power frequencies or (for relay application) on the coercivity.

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