ISO 5002:2025

International
Standard
ISO 5002
Fifth edition
Hot-rolled and cold-reduced
2025-05
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 2025
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ii
Contents Page
Foreword .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Dimensions . 2
5 Conditions of manufacture . 3
5.1 Steelmaking .3
5.2 Chemical composition .3
5.3 Chemical analysis .3
5.3.1 Heat analysis .3
5.3.2 Product analysis .4
5.4 Coating .4
5.4.1 Coating thickness .4
5.4.2 Coating adherence.4
5.5 Fabrication qualities .5
5.6 Weldability .5
5.7 Application .5
5.8 Mechanical properties .5
5.9 Strain ageing .7
5.10 Surface treatment .8
5.10.1 General .8
5.10.2 Surface preparation for painting .8
5.10.3 Mill passivation .8
5.11 Oiling .8
5.12 Painting .8
6 Dimensional and shape tolerances. 8
7 Sampling . 9
7.1 Tensile test .9
7.2 Coating tests .9
7.2.1 Coating mass .9
7.2.2 Coating adherence.9
8 Test methods . 9
8.1 Tensile test .9
8.2 Coating tests .9
8.2.1 Coating mass .9
8.2.2 Coating adherence.10
9 Designation system . 10
9.1 General .10
9.2 Base-metal quality designation .10
9.3 Coating designation.10
9.4 Surface treatment .10
9.5 Examples .10
10 Retests .11
11 Resubmission.11
12 Workmanship .11
13 Inspection and acceptance .11
14 Coil size .12
15 Marking . .12

iii
16 Information to be supplied by the purchaser .12
Annex A (normative) Orders requiring base-metal thickness . 14
Bibliography .15

iv
Foreword
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This document was prepared by Technical Committee ISO/TC 17, Steel, Subcommittee SC 12, Continuous mill
flat rolled products.
This fifth edition cancels and replaces the fourth edition (ISO 5002:2013), which has been technically
revised.
The main changes are as follows:
— the Scope has been modified to only include relevant text;
— the terms and definitions have been updated;
— the former Clause 15 "Designation" has been replaced with a new Clause 9 "Designation system";
subsequent clauses have been renumbered.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.

v
International Standard ISO 5002:2025(en)
Hot-rolled and cold-reduced electrolytic zinc-coated carbon
steel sheet of commercial and drawing qualities
1 Scope
This document specifies the requirements for hot-rolled and cold-reduced electrolytic zinc-coated carbon
steel sheet of commercial and drawing qualities.
The product is intended for the manufacture of formed or of miscellaneous parts, and can be supplied
chemically treated to render it more suitable for painting.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes
requirements of this document. 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.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
3.1
electrolytic zinc-coated carbon steel sheet
product obtained by electrolytic deposition of a zinc coating on carbon steel sheet on a zinc coating line to
produce either electrolytic zinc-coated coils or electrolytic zinc-coated cut lengths
3.2
commercial
base-metal quality intended for general fabricating purposes where sheet is used in the flat condition, or for
bending or moderate forming
3.3
drawing
base-metal quality intended for parts where drawing or severe forming may be involved
3.4
deep drawing
base-metal quality intended for parts where severe forming or severe drawing may be involved

3.5
deep drawing aluminium killed
base-metal quality intended for fabricating parts where particularly severe drawing or forming may be
involved
3.6
extra-deep drawing
base-metal quality intended for applications where maximum formability is required by applying interstitial-
free steel
3.7
interstitial-free steel
IF steel
extra-low-carbon steel in which all interstitial elements are stabilized with titanium and/or equivalent
elements
Note 1 to entry: Interstitial-free steel is sometimes referred to as stabilized steel.
3.8
breakage allowance
agreed upon level of acceptable die breakage not subject to claim
3.9
skin passing
light cold-rolling of the product
Note 1 to entry: The purpose of the skin passing is one or more of the following: to minimize the appearance of coil
breaks, stretcher strains and fluting; and to control the shape; and to obtain the required surface finish.
Note 2 to entry: Some increase in hardness and some loss in ductility will result from skin passing.
3.10
lot
specified quantity of steel sheet of the same designation rolled to the same thickness and coating condition
3.11
differential coating
coating deliberately produced to have a different coating mass on each surface
3.12
coating mass
total amount of coating on both sides of the sheet, expressed in grams per square metre (g/m ) of sheet
4 Dimensions
4.1 Electrolytic zinc-coated carbon steel sheet is produced in thicknesses from 0,36 mm to 4,0 mm
inclusive after coating, and in widths of 600 mm and over in coils and cut lengths. Materials thinner than
0,36 mm or thicker than 4,0 mm may be applied for electrolytic zinc coating by agreement between the
purchaser and the manufacturer. Electrolytic zinc-coated carbon steel sheet less than 600 mm wide, slit
from wide sheet, is considered as sheet.
4.2 The thickness of electrolytic zinc-coated carbon steel sheet may be specified as a combination of the
base-metal and metallic coating, or as the base-metal alone. The purchaser shall indicate 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
requirements for specifying the thickness as base-metal alone.

5 Conditions of manufacture
5.1 Steelmaking
The processes used in making the steel and in manufacturing hot-rolled and cold-reduced electrolytic zinc-
coated carbon steel sheet are left to the discretion of the manufacturer. On request, the purchaser shall be
informed of the steelmaking process being used.
5.2 Chemical composition
The chemical composition (heat analysis) shall conform to the requirements 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
Base-metal 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
Table 2 — Chemical composition (heat analysis) for cold-reduced electrolytic zinc-coated carbon
steel sheet
Mass fractions in percent
a
Base-metal quality
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 aluminium
c
CR4 killed 0,06 0,45 0,030 0,03 —
(non-ageing)
b
Extra-deep drawing
CR5 0,02 0,25 0,020 0,02 0,15
(stabilized interstitial
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 applied to CR2, CR3 and CR4 orders, the values of 0,15 % maximum titanium and 0,10 % maximum niobium and
vanadium 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 shall be made by the manufacturer in order to determine compliance with the
requirements given in Tables 1, 2 and 3. On request, a report of the heat analysis shall be made available
to the purchaser or the purchaser’s 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 in order 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.
Table 3 — Limits on additional chemical elements
Mass fractions in percent
Heat analysis Product analysis
Element
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 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 apply.
c
Heat analysis greater than 0,008 % may be supplied after agreement between the purchaser and the manufacturer.
d
For IF steel only, the values of 0,15 % maximum titanium and 0,10 % maximum for niobium and vanadium are acceptable to
ensure that carbon and nitrogen are fully stabilized.
Table 4 — Product analysis tolerances for Table 1 and Table 2
Mass fractions in percent
Element Maximum of specified element Tolerance over maximum specified
C 0,15 0,03
Mn 0,60 0,03
P 0,05 0,01
...