CEI IEC 60404-1-2000 pdf download

CEI IEC 60404-1-2000 pdf download.Magnetic materials – Part 1: Classification.
This standard is intended to classify commercially available magnetic materials.
The term “magnetic materials” denotes substances where the application requires the existence of ferromagnetic or ferrimagnetic properties.
In this standard, the classification of magnetic materials is based upon the generally recognized existence of two main groups of products:
— soft magnetic materials (coercivity <1 000 A/m);
— hard magnetic materials (coercivity >1 000 Nm).
Within these main groups, the classification when appropriate recognizes the following characteristics:
— the main alloying element and the metallurgical state and physical properties of the material:
— when possible and convenient, the relationship between these characteristics is identified.
A classification by specific areas of application cannot be applied to all materials because different materials can very often be used for the same application depending on the characteristics required.
1.2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of this part of IEC 60404. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this part of IEC 60404 are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies. Members of IEC and ISO maintain registers of currently valid International Standards.
IEC 60050(121):1998, International Electrotechnical Vocabulary (1EV) — Part 121: Electromagnetism
IEC 60050(151):1978, International Electrotechnical Vocabulary (1EV) — Chapter 151: Electrical and magnetic devices
IEC 60050(221):1990, International Electrotechnical Vocabulary (1EV) — Chapter 221: Magnetic materials and components
1.3 Definitions
The definitions relating to the various terms used in this part of IEC 60404 are defined in IEC 60050(121)，IEC 60050(151), IEC 60050(221) and in the product standards of the IEC 60404-8 series.
2 Magnetically soft materials (coercivity s1 kA/m)
2.1 Class A- lrons
2.1.1 General
These materials are covered by IEC 60404-8-6 and IEC 60404-8-10.
2.1.1.1 Chemical composition
The basic constituent of these materials is iron, and they are often referred to as “commercially pure” or “magnetically soft” irons. Elements that adversely affect the remanence, coercivity, saturation, magnetic polarization and stability of the magnetic properties are controlled to produce the required magnetic properties for the proposed application. The amounts of the most significant elements， other than iron， when they are present in these materials are characteristically within the ranges of table 1.CEI IEC 60404-1 pdf download.