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ISO 5002 Document Information:
Title
Hot-rolled and cold-reduced electrolytic zinc-coated carbon steel sheet of commercial and drawing qualities
International Organization for Standardization
Publication Date:
May 1, 2008
Scope:
This International Standard specifies the characteristics of
carbon steel sheet of commercial and drawing qualities in cut
length or coil form, zinc coated by electrolytic deposition.
Electrolytic zinc-coated sheet is intended for the manufacture of
formed or of miscellaneous parts, and can be supplied chemically
treated to render it more suitable for painting. The zinc coating
is expressed in micrometres of thickness per side for either
equally coated, differentially coated or one-side coated sheets.
These sheets are generally produced with coatings which are not
intended to withstand outdoor exposure without chemical treatment
and painting. Electrolytic zinc-coated sheet may be produced in
thicknesses of 0,36 mm and thicker (normally up to 4,0 mm) and in
widths of 600 mm and over in coils or cut lengths. It is recognized
that materials thinner than 0,36 mm or heavier than 4,0 mm may be
suitable for electrolytic zinc coating, and if required should be
the subject of agreement between the interested parties.
The thickness of zinc-coated sheet can be specified as a
combination of the base metal and metallic coating, or as the base
metal alone. The purchaser indicates on the order which method of
specifying thickness is required. In the event that the purchaser
does not indicate any preference, the thickness as a combination of
the base metal and coating will be provided. Annex A describes the
requirement for specifying the thickness as base metal alone.
Electrolytic zinc-coated sheet less than 600 mm wide may be slit
from wide sheet and will be considered as sheet.
Commercial quality electrolytic zinc-coated sheet (HR1 or CR1)
is intended for general fabricating purposes where sheet is used in
the flat, or for bending or moderate forming.
Drawing quality elelectrolytic zinc-coated sheet (HR2, HR3, HR4,
or CR2, CR3, CR4, CR5) is intended for drawing or severe forming.
It is furnished to all requirements of this International Standard
or, by agreement when ordered, to fabricate an identified part, in
which case the mechanical properties of Table 3 (for hot rolled)
and Table 4 (for cold reduced) do not apply.
Drawing qualities are identified as follows:
— HR2/CR2 — Drawing quality
— HR3/CR3 — Deep drawing quality
— HR4/CR4 — Deep drawing quality aluminum killed (see
4.8)
— CR5 — Extra deep drawing quality (stabilized
interstitial free)
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