ISO 5002:2013

INTERNATIONAL ISO
STANDARD 5002
Fourth edition
2013-11-15
Hot-rolled and cold-reduced electrolytic
zinc-coated carbon steel sheet of
commercial and drawing qualities
Tôles en acier au carbone laminées à chaud et à froid, revêtues par
zingage électrolytique (tôles électro-zinguées) de qualité commerciale
et pour emboutissage
Reference number
ISO 5002:2013(E)
©
ISO 2013

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ISO 5002:2013(E)

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© ISO 2013
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Published in Switzerland
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ISO 5002:2013(E)

Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Dimensions . 2
5 Conditions of manufacture . 2
5.1 Steelmaking . 2
5.2 Chemical composition . 2
5.3 Chemical analysis . 3
5.4 Coating . 4
5.5 Fabrication qualities. 5
5.6 Weldability . 6
5.7 Application . 6
5.8 Mechanical properties . 6
5.9 Strain ageing . 7
5.10 Surface treatment of electrolytic zinc-coated products . 8
5.11 Oiling . 8
5.12 Painting . 8
6 Dimensional and shape tolerances . 9
7 Sampling . 9
7.1 Tensile sampling . 9
7.2 Coating tests . 9
8 Test methods . 9
8.1 Tensile test . 9
8.2 Coating tests . 9
9 Retests .10
10 Resubmission .10
11 Workmanship .10
12 Inspection and acceptance .10
13 Coil size .10
14 Marking .11
15 Designation .11
16 Information to be supplied by the purchaser.12
Annex A (normative) Specification of thickness as base metal alone .13
Bibliography .15
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ISO 5002:2013(E)

Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2. www.iso.org/directives
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received. www.iso.org/patents
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
The committee responsible for this document is ISO/TC 17, Steel, Subcommittee SC 12, Continuous mill
flat rolled products.
For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment,
as well as information about ISO’s adherence to the WTO principles in the Technical Barriers to Trade
(TBT) see the following URL: http://www.iso.org/iso/home/standards_development/resources-for-
technical-work/foreword.htm
This fourth edition cancels and replaces the third edition (ISO 5002:2008), of which it constitutes a
minor revision.
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INTERNATIONAL STANDARD ISO 5002:2013(E)
Hot-rolled and cold-reduced electrolytic zinc-coated
carbon steel sheet of commercial and drawing qualities
1 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 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 can 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 thicker than 4,0 mm can be suitable for electrolytic zinc coating,
and, if required, be the subject of agreement between the interested parties.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
ISO 6892-1, Metallic materials — Tensile testing — Part 1: Method of test at room temperature
ISO 7438, Metallic materials — Bend test
ISO 16160, Hot-rolled steel sheet products — Dimensional and shape tolerances
ISO 16162, Cold-rolled steel sheet products — Dimensional and shape tolerances
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
electrolytic zinc-coated steel sheet
product obtained by electrolytic deposition of a zinc coating on steel sheet on a zinc coating line to
produce either electrolytic zinc-coated coils or electrolytic zinc-coated cut lengths
3.2
skin pass
light cold rolling of hot-rolled descaled sheet or of the cold-reduced and annealed steel sheet prior
to zinc coating
Note 1 to entry: The purpose of the skin pass is to produce a higher degree of surface smoothness and thereby
improve the surface appearance. The skin pass also temporarily minimizes the occurrence of a surface condition
known as stretcher strain (Luders lines) or fluting during the fabrication of finished parts. The skin pass also
controls and improves flatness. Some increase in hardness and loss of ductility will result from skin passing.
3.3
stabilized interstitial free steel
extra low carbon steel in which all interstitial elements are combined with titanium and/or
equivalent elements
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ISO 5002:2013(E)

3.4
grade substitution
interstitial free steel (IF steel) may be applied on orders specifying CR4
Note 1 to entry: Deep drawing special killed, provided that the customer is informed of the substitution and
related shipping documents reflecting the actual material shipped.
3.5
lot
50 t or less of sheet of the same designation rolled to the same thickness and condition
4 Dimensions
4.1 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.
4.2 Electrolytic zinc-coated sheet less than 600 mm wide can be slit from wide sheet and will be
considered as sheet.
5 Conditions of manufacture
5.1 Steelmaking
The processes used in making the steel and in manufacturing electrolytic zinc-coated cold-reduced
sheet and hot-rolled sheet are left to the discretion of the manufacturer. When requested, the purchaser
shall be informed of the steelmaking process being used.
5.2 Chemical composition
The chemical composition (heat analysis) shall not exceed the values given in Tables 1, 2, and 3.
Table 1 — Chemical composition (heat analysis) for hot-rolled electrolytic zinc-coated
carbon steel sheet
Mass fractions in percent
Quality C Mn P S
max. max. max. max.
Designation Name
HR1 commercial 0,12 0,60 0,045 0,035
HR2 drawing 0,10 0,45 0,035 0,035
HR3 deep drawing 0,08 0,40 0,030 0,030
deep drawing aluminium
HR4 0,08 0,35 0,025 0,030
killed
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ISO 5002:2013(E)

Table 2 — Chemical composition (heat analysis) for cold-rolled electrolytic zinc-coated
carbon steel sheet
Mass fractions in percent
Quality
a
C Mn P S Ti
max. max. max. max. max.
Designation Name
CR1 commercial 0,15 0,60 0,050 0,035 —
c
CR2 drawing 0,10 0,50 0,040 0,035 —
c
CR3 deep drawing 0,08 0,45 0,030 0,03 —
deep drawing alumin-
c
CR4 ium killed 0,06 0,45 0,030 0,03 —
(non-ageing)
b
extra deep drawing
CR5 (stabilized interstitial 0,02 0,25 0,020 0,02 0,15
free)
a Titanium may be replaced totally or partially by niobium or vanadium. Carbon and nitrogen shall be completely
stabilized.
b By agreement, the manganese, phosphorus, and sulfur maximums may be adjusted.
c If IF steel is to be applied to CR1 or CR4 orders, the values of 0,15 % maximum Ti and 0,10 % maximum Nb and V are
acceptable to ensure that carbon and nitrogen are fully stabilized.
5.3 Chemical analysis
5.3.1 Heat analysis
An analysis of each heat of steel shall be made by the manufacturer in order to determine compliance
with the requirements given in Tables 1, 2 and 3. On request, at the time of ordering, this analysis shall
be reported to the purchaser or his representative. Each of the elements listed in Tables 1 and 2 shall be
included in the report of the heat analysis. If one or more of the elements in Table 3 is/are specified, the
analysis shall be reported.
5.3.2 Product analysis
A product analysis may be made by the purchaser to verify the specified analysis of the semi-finished
or finished steel, and shall take into consideration any normal heterogeneity. The sampling method
and deviation limits shall be agreed upon between the manufacturer and the purchaser at the time of
ordering. The product analysis tolerances shall be in accordance with Table 3 and Table 4.
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ISO 5002:2013(E)

Table 3 — Limits on additional chemical elements
Mass fractions in percent
Heat analysis Product analysis
Elements
max. max.
a
Cu 0,20 0,23
a
Ni 0,20 0,23
a,b
Cr 0,15 0,19
a,b
Mo 0,06 0,07
c,d
Nb 0,008 0,018
c,d
V 0,008 0,018
c,d
Ti 0,008 0,018
a The sum of copper, nickel, chromium, and molybdenum shall not exceed 0,50 % on heat analysis. When one or more of
these elements are specified, the sum does not apply; in which case, only the individual limits on the remaining elements will
apply.
b The sum of chromium and molybdenum shall not exceed 0,16 % on heat analysis. When one or more of these elements
are specified, the sum does not apply; in which case, only the individual limits on the remaining elements will apply.
c An analysis greater than 0,008 % may be supplied after agreement between the producer and the consumer.
d For IF steel, only the values of 0,15 % maximum Ti and 0,010 % maximum for Nb and V are acceptable to ensure that
carbon and nitrogen are fully stabilized.
Table 4 — Product analysis tolerances
Mass fractions in percent
Tolerance over maximum speci-
Element Maximum of specified element
fied
C 0,15 0,03
Mn 0,60 0,03
P 0,05 0,01
S 0,035 0,01
Ti 0,15 0,01
NOTE The maximum tolerance in this table is the allowable excess over the specified requirements and not the heat
analysis.
5.4 Coating
5.4.1 Coating mass
The amount of coating is expressed in micrometres of thickness per surface of sheet and shall conform
to the requirements of minimum thickness given in Table 5.
5.4.2 Coating adherence
The zinc-coated sheet shall be capable of being bent in any direction, in accordance with the mandrel
diameter requirements for the quality designations included in Table 6.
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ISO 5002:2013(E)

Table 5 — Zinc coatings for electrolytic zinc-coated hot-rolled and cold-reduced steel sheet
Nominal thickness Minimum thickness Nominal coating mass
a b
Coating designation per surface per surface per surface
2
µm µm g/m
ZE 04 0,4 0,4 3
ZE 10 1,0 0,9 7
ZE 14 1,4 1,2 10
ZE 25 2,5 2,2 18
ZE 28 2,8 2,4 20
ZE 38 3,8 3,4 27
ZE 42 4,2 3,6 30
ZE 50 5,0 4,5 36
ZE 56 5,6 4,8 40
ZE 70 7,0 6,0 50
ZE 75 7,5 6,8 54
ZE 100 10,1 9,1 75
ZE 135 13,5 12,2 96
ZE 150 15,0 13,5 107
3
NOTE The density of zinc used is 7 100 kg/m .
a Equally coated material should be designated as ZE 10/10, for example. Differentially coated material should be
designated as ZE 50/10, for example. Single-surface-coated material should be designated as ZE 38/0, for example.
b This is for information only.
Table 6 — Coating bend test requirements for electrolytic zinc-coated hot-rolled and cold-
reduced steel sheet
Designation 180° bend mandrel diameter
e < 3 e ≥ 3
HR1, HR2, HR3, HR4 0 1,0a
CR1, CR2, CR3, CR4, CR5 0 0
NOTE 1 e is the thickness of the sheet in millimetres.
NOTE 2 a is the thickness of bend test piece.
5.5 Fabrication qualities
5.5.1 Commercial quality electrolytic zinc-coated sheet (HR1 or CR1) is intended for general fabricating
purposes where sheet is used in the flat state or for bending or moderate forming.
5.5.2 Drawing quality electrolytic zinc-coated sheet (HR2, HR3, and HR4 or CR2, CR3, CR4, and CR5) is
intended for drawing or severe forming. It is furnished according 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 4 (for hot-rolled steel sheet) and Table 5 (for cold-reduced steel sheet) do not apply.
Drawing qualities are identified as follows:
— HR2/CR2 (drawing quality);
— HR3/CR3 (deep drawing quality);
— HR4/CR4 [deep drawing quality aluminium killed (see 5.9)];
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ISO 5002:2013(E)

— CR5 [extra deep drawing quality (stabilized interstitial free)].
5.6 Weldability
The product is suitable for welding if appropriate conditions are selected.
5.7 Application
It is desirable that electrolytic zinc-coated steel sheet be identified for fabrication by the name of the
part or by the intended application. Steel sheet of drawing qualities HR2, HR3, and HR4 and CR2, CR3,
CR4, and CR5 may be produced to make an identified part within a properly established breakage
allo
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