IEC 60404-1:2000 pdf download

IEC 60404-1:2000 pdf download.Magnetic materials -Part 1:Classification.
2.2.2.1.3 AvaIlable forms
These materials are supplied in the form of cold-rolled coils or sheets or (for relay application) in the form of hot-rolled strip, sheet or plate.
2.2.2.2 Physical characteristics
In addition to specific total loss, a more complete definition of these materials can be based on the following properties:
— magnetic: magnetic polarization at various values of field strength;
— mechanical: suitability for punching operations, surface condition, stacking factor;
— metallurgical state: hot-rolled;
hard state — i.e. cold-rolled;
semi-processed state — i.e. annealed and finally cold-rolled:
fully processed state — i.e. finally annealed,
NOTE For material delivered in the hard or semi-processed state, subctasslflcation Is based on the total specific loss or coercivity measured afl.r heat tr.atm.nt according to the requirements of the product standard or recommendations of the manufacturer.
— dimensions: thickness, width and (as required) length.
Recommended nominal thicknesses for the cold-rolled materials are 0,47 mm. 0,50 mm. 0,65mm and 1.0 mm.
Magnetic measurements are made in accordance with IEC 60404-2, IEC 60404-3 or IEC 60404-7.
Ranges of specified specific total loss, after annealing, for the commonly used thicknesses are as shown in table 4.
Table 4 — Ranges of sp.clfled valu•s of maximum specific total loss
The specified maximum value of coercivity for relay material ranges from 40 Aim to 240 Aim.
2.22.3 Main applications
The materials are used in the manufacture of laminated cores for electrical apparatus and especially small machines and for relay applications.
2.3 Class C — Silicon steels
2.3.1 Class C.1 — Bulk material
2.3.1.1 General
Some of these materials are covered by IEC 60404-8-6 and IEC 60404-8-10.
2.3.1.1.1 Chemical composition
The basic constituent of these materials Is iron In wtilch the main alloying element Is silicon in the range of 0.5 % to 5 %.
2.3.1.1.2 BasIs of subclassltlcatlon
The recommended subclassification is based on coercivity values or on electrical resistivity which is a function of silicon content.
2.3.1.1.3 Available forms
These materials are available as hot-rolled and cold-drawn bar, wire, ground bar and forging billets and require heat treatment after mechanical working to achieve the required magnetic properties
2.3.1.2 Physical charact.ristlcs
In addition to the coercivity and the electrical resistivity for which ranges are given in table 5, a more complete definition of these materials can be based on the following characteristics:
— magnetic: saturation magnetic po4arization, magnetic polarization for various field strengths. remanent magnetic polarization:
— mechanical: machinability, ductility, hardness;
– metallurgical state: hot- or cold-worked, annealed to produce required magnetic characteristics
Table 5 — Ranges of specified values for magnetic and electric properties
S Aim T
2104,5 0,35100,00 48to12 O,Stol,2 l,ltol,3 1,21o1,35 1,5
Value not specified but typ.cei
2.3.1.3 Main applications
The main applications are for the magnetic circuits of relays, magnetic clutches, magnetic pole pieces, steppin9 motors and gyro housings.
2.3.2 Class C.2 — Flat material
2.3.2.1 Class C.21 — Isotropic’ (non-oriented) steels for use at power frequencies
2.3.2.1.1 General
These matenals are covered by i[C 60404-8-2, IEC 60404-8-4, [C 60404-8-6 and I[C 60404-8-10.
2.3.2.1.1.1 Chemical composition
The basic constituent of these materials is iron. The main alloying element is silicon, whose content may be between 0.5 % and 5 %. Other alloyrng elements, for example aluminium, may also be present. The material also contains unavoidable impurities, together with a low level of other elements which may arise from additions necessitated during the manufacturing process.
2.3.2.1.1.2 Basis of subclassification
The recommended subclassification is based on the specific total loss which is a function of thickness and normally measured at a magnetic polarization value of 1.5 T and at power frequencies.
When the application demands it (for example relays), it may be more appropriate for the subclassification to be based on coercivity or permeability.
2.3.2.1.1.3 Available forms
These materials are normally supplied in the lotni of cold-rolled coils or sheets.
2.3.2.1.2 Physical characteristics
In addition to the values of specific total loss, a more complete definition of these materials can be based on the following characteristics:
— magnetic: magnetic polarization for various values of magnetic field strength. specific apparent power for different values of magnetic polarization anisotropy of loss;
— electrical: type of surface insulation and its resistance, resistivity;
— mechanical: suitability for punching operations, ductility, tensile strength. hardness, surface condition and finish, stacking factor, flatness, edge camber.
— metallurgical state: hard state. i.e. as cold rolled.