EN 10079-1992 pdf download.Definition of steel products.
5.3 Electrical steels8
Electrical steels are characterised by their magnetic properties and are intended for the manufacture of electrical circuits. They are supplied in the form of cold rolled sheet or strip, generally less than 2 mm thick and of width up to and including 1 500 mm.
NOTE There are also certain hot rolled flat products in thicknesses of 1.5 mm up to 5 mm with specified mechanical and magnetic properties.
Electrical steels are defined by the following specified principal magnetic properties:
a) specific total loss in W/kg at a specified level of peak magnetic flux density, Tand frequency liz;
b) peak magnetic flux density, Tat a specified level of peak magnetic field strength A/rn and frequency Hz.
Electrical steels are further defined as follows.
5.3.1 Non oriented grain electrical steels
Non alloy steels and steels alloyed with silicon or silicon and aluminium which are essentially isotropic in their magnetic properties; i.e. the magnetic properties are similar both in the direction of rolling and in the transverse direction.
They may he supplied:
a) in the semi processed state with the required specific total loss achieved after the material has been annealed by the user according to a reference heat treatment:
b) in the finally annealed state, when the product may be supplied uncoated or with an insulating coating on one or both surfaces.
5.3.2 Grain oriented electrical steels Steels alloyed with silicon which are anisotropic in that they possess a metallurgical structure which gives preferential magnetic properties in the direction of rolling. These steels are supplied with an insulating coating on both surfaces.
5.4 Tin mill and allied products for packaging 9)10)11)
5.4.1 Blackplate12
Non alloy, low carbon steel supplied in strip or sheet form which has been single or double cold reduced.
Single reduced blackplate is supplied in thicknesses from 0.17 mm up to and including 0.49 mm, double reduced blackplate in thicknesses from 0.14 mm up to and including 0.29 mm.
NOTE Blackplate is normally used to manufacture tinpiate or
ECCS. but in certain packaging applications it may be used as
such. In such cases the product must he suitable for varnishing
(lacquering) or printing.
5.4.2 Tinpiate
Non alloy, low carbon steel supplied in strip or sheet form which has been single or double cold reduced, coated on both surfaces with tin in a continuous electrolytic process.
Single reduced tinpiate is supplied in thicknesses from 0.17 mm up to and including 0.49 mm, double reduced tinpiate in thicknesses from 0.14 mm up to and including 0.29 mm. Tinpiate is supplied normally with a passivation treatment and a protective coating of oil and is suitable for varnishing (lacquering) or printing.
NOTE Tinpiate may also be obtained by hot dipping in a bath of molten tin.
5.4.3 Tinned sheet and strip
Non alloy, low carbon steel supplied in strip or sheet form of a thickness of 0,50 mm or over and tin coated on both surfaces.
5.4.4 Electrolytic chromium/chromiuin oxide coated steel (ECCS)
Non alloy, low carbon steel supplied in strip or sheet form which may have been single or double cold reduced: coated on both surfaces by a cathodic process with a duplex film of metallic chromium adjacent to the steel substrate with an outer layer of hydrated chromium oxide or hydroxide.
Single reduced ECCS is supplied in thicknesses from 0.17 mm up to and including 0.49 mm. double
reduced KCCS in thicknesses from 0.14 mm up to and including 0.29 mm. ECCS is supplied normally with a protective coating of oil and is suitable for varnishing (lacquering) or printing.
5.5 Coated hot or cold rolled flat products’3 Hot or cold rolled products with a permanent coating other than those defined in 5.2, 5.3 or 5.4 whether:
a) on both surfaces:
— of equal thickness on each surface;
— of different thickness: differential coating; b) on one surface only.
NOTE All figures shown are nominal and relate to the current technology: they may change in future.EN 10079-1992 pdf download.
EN 10079-1992 pdf download
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