ISO 3575:2016

DRAFT INTERNATIONAL STANDARD
ISO/DIS 3575
ISO/TC 17/SC 12 Secretariat: ANSI
Voting terminates on:
Voting begins on:
2015-07-20 2015-10-20
Continuous hot-dip zinc-coated and zinc-iron alloy-coated
carbon steel sheet of commercial and drawing qualities
Tôles en acier au carbone galvanisées en continu par immersion à chaud, de qualité commerciale et
pour emboutissage
ICS: 77.140.50
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENT AND APPROVAL. IT IS
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
Reference number
NATIONAL REGULATIONS.
ISO/DIS 3575:2015(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
©
PROVIDE SUPPORTING DOCUMENTATION. ISO 2015

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ISO/DIS 3575:2015(E)

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ISO/DIS 3575:2015(E)

Contents Page
Foreword .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Dimensions . 3
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 . 3
5.4 Mechanical properties . 4
5.4.1 Ordering conditions . 4
5.4.2 Fabrication qualities . 5
5.4.3 Interstitial free steel . . 5
5.5 Coating . 7
5.5.1 Coating mass. 7
5.5.2 Coating adherence . 7
5.6 Weldability . 8
5.7 Painting . 8
5.8 Surface treatment . 8
5.8.1 Mill passivation . 8
5.8.2 Mill phosphating . 8
5.8.3 Oiling . 9
5.9 Coated coil joining . 9
5.10 Dimensional and shape tolerances . 9
6 Sampling . 9
6.1 Tensile test . 9
6.2 Coating tests . 9
6.2.1 Coating mass. 9
6.2.2 Triple-spot test . 9
6.2.3 Single-spot test . 9
6.2.4 Coating adherence .10
7 Test methods .10
7.1 Tensile test .10
7.2 Coating properties .10
7.2.1 Coating mass.10
7.2.2 Coating adherence .10
8 Designation system .10
8.1 Coating type .10
8.2 Coating mass .10
8.3 Coating finish condition .11
8.4 Surface treatment .11
8.5 Base-metal quality designation .11
8.6 Examples .11
9 Retests .12
9.1 Machining and flaws.12
9.2 Elongation .12
9.3 Additional tests .12
10 Resubmission .12
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ISO/DIS 3575:2015(E)

11 Workmanship .12
12 Inspection and acceptance .13
13 Coil size .13
14 Marking .13
15 Information to be supplied by the purchaser.13
Annex A (normative) Orders requiring base-metal thickness .15
Bibliography .16
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ISO/DIS 3575:2015(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.
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: Foreword - Supplementary information
The committee responsible for this document is ISO/TC 17, Steel, Subcommittee SC 12, Continuous mill
flat rolled products.
This fifth edition cancels and replaces the fourth edition (ISO 3575:2011), which has been technically revised.
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DRAFT INTERNATIONAL STANDARD ISO/DIS 3575:2015(E)
Continuous hot-dip zinc-coated and zinc-iron alloy-coated
carbon steel sheet of commercial and drawing qualities
1 Scope
This International Standard is applicable to the requirements for steel sheet, in coils and cut lengths,
metallic-coated by the continuous hot-dip process, with zinc and zinc-iron alloy coatings.
The product is intended for applications requiring corrosion resistance, formability and paintability.
The steel sheet is produced in a number of quality designations and grades, coating mass, surface
treatments and coating conditions designed to be compatible with differing application requirements.
This International Standard does not cover steels designated as structural quality, which are covered in
[[1]]
ISO 4998 .
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 reference documents (including any amendments) applies.
ISO 1460, Metallic coatings — Hot dip galvanized coatings on ferrous materials — Gravimetric determination
of the mass per unit area
ISO 2178, Non-magnetic coatings on magnetic substrates — Measurement of coating thickness —
Magnetic method
ISO 3497, Metallic coatings — Measurement of coating thickness — X-ray spectrometric methods
ISO 6892-1, Metallic materials — Tensile testing — Part 1: Method of test at room temperature
ISO 7438, Metallic materials — Bend test
ISO 16163, Continuously hot-dipped coated 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
commercial
intended for general fabricating purposes where sheet is used in the flat condition, or for bending or
moderate forming
3.2
drawing
intended for parts where drawing or severe forming may be involved
3.3
deep drawing
intended for parts where severe forming or severe drawing may be involved
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ISO/DIS 3575:2015(E)

3.4
deep drawing aluminum killed
intended for fabricating parts where particularly severe drawing or forming may be involved
3.5
extra deep drawing stabilized
intended for applications where maximum formability is required by applying interstitial free steel
3.6
interstitial free steel (IF)
extra-low-carbon steel in which all interstitial elements are stabilized with titanium and/or
equivalent elements
Note 1 to entry: to entry Interstitial free steel is sometimes referred to as stabilized steel.
3.7
ageing
change in steel properties with the passage of time
Note 1 to entry: to entry Ageing may result in a change in yield strength and a corresponding decrease in ductility
during storage. Ageing always has a negative effect on formability. The redevelopment of a definite yield point
phenomenon as a result of ageing can result in a renewed susceptibility to surface imperfections, such as stretcher
strain marks (Lüder’s Lines) and fluting when the steel is formed. To avoid these adverse outcomes, it is essential
that the period between final processing at the producing mill and fabrication be kept to a minimum. Rotation of
stock, by using the oldest material first, is important. Effective roller leveling immediately prior to fabrication can
achieve reasonable freedom from stretcher strain marks.
3.8
continuous hot-dip zinc-coated steel sheet
steel sheet product in coils or cut lengths manufactured on a continuous coating line with a hot-dip zinc
coating on base metal of cold-reduced or hot-rolled descaled steel
3.9
continuous hot-dip zinc-iron alloy coated steel sheet
steel sheet product obtained by processing continuous hot-dip zinc-coated steel sheet to form a zinc-iron
alloy coating
Note 1 to entry: to entry This product, designated ZF is not spangled, is normally dull in appearance and, for some
applications, may be suitable for immediate painting without further treatment, except normal cleaning. Zinc-
iron alloy coatings may powder during severe forming.
3.10
differential coating
coating deliberately produced to have a different coating mass on each surface
3.11
breakage allowance
agreed upon level of acceptable die breakage not subject to claim
3.12
normal spangle
coating formed as a result of unrestricted growth of zinc crystals during normal solidification
Note 1 to entry: to entry This coating has a metallic lustre and is the type normally furnished for a wide variety
of applications. It may be furnished S (normal coating, with skin pass) or N (normal coating, as coated); however,
it may be variable in appearance and not suitable for decorative painting.
3.13
smooth finish
smoothness produced by skin-passing the coated material in order to achieve an improved surface
condition as compared with the normal as-coated product
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ISO/DIS 3575:2015(E)

3.14
skin pass
light cold rolling of the product
Note 1 to entry: 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; to control the shape; to obtain the required surface finish.
Note 2 to entry: to entry Some increase in hardness and some loss in ductility will result from skin passing.
3.15
lot
50 t or less of steel sheet of the same grade rolled to the same thickness and coating condition
4 Dimensions
4.1 Zinc-coated and zinc-iron alloy-coated steel sheet is produced in thicknesses from 0,25 mm to
5 mm inclusive after coating, and in widths of 600 mm and over in coils and cut lengths. Zinc-coated and
zinc-iron alloy-coated steel sheet less than 600 mm wide, slit from wide sheet, will be considered as sheet.
4.2 The thickness of zinc-coated and zinc-iron alloy-coated 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 of the base metal alone.
5 Conditions of manufacture
5.1 Steelmaking
Unless otherwise agreed by the interested parties, the processes used in making the steel and in
manufacturing zinc-coated and zinc-iron alloy-coated 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 and 2.
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 and 2. 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. When the amount of copper, nickel, chromium or molybdenum
present is less than 0,02 %, the analysis may be reported as “<0,02%”.
5.3.2 Product analysis
A product analysis may be made by the purchaser in order to verify the specified analysis of the product
and shall take into consideration any normal heterogeneity. The product analysis tolerances shall be in
accordance with Tables 2 and 3.
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ISO/DIS 3575:2015(E)

Table 1 — Chemical composition (heat analysis)
Mass fractions in percent
Base-metal quality C Mn P S Ti
Designation Name max. max. max. max. max.
01 Commercial 0,15 0,60 0,05 0,035
02 Drawing 0,10 0,50 0,04 0,035
a
03 Deep drawing 0,08 0,45 0,03 0,03
Deep drawing alu-
a
04 0,06 0,45 0,03 0,03
minium killed
Extra deep drawing
a
05 0,02 0,25 0,02 0,02 0,15
stabilized
a
Interstitial free steel may be applied (see 5.4.3)
Table 2 — Limits on additional chemical elements
Mass fractions in percent
a a ab ab c cd c
Cu Ni Cr Mo Nb V Ti
Element
max. max. max. max. max. max. max.
Heat analysis 0,20 0,20 0,15 0,06 0,008 0,008 0,008
Product analysis 0,23 0,23 0,19 0,07 0,018 0,018 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
For interstitial free steels only, the value of 0,15 % titanium, and 0,10 % maximum for niobium and vanadium are
acceptable to ensure that the carbon and nitrogen are fully stabilized.
d
Heat analysis greater than 0,008 % may be supplied after agreement between the producer and purchaser.
Table 3 — Product analysis tolerances
Mass fractions in percent
Tolerance over maximum spec-
Element Maximum of specified element
ified
C 0,15 0,03
Mn 0,60 0,03
P 0,05 0,01
S 0,035 0,01
NOTE The above maximum tolerance is the allowable excess over the specified requirement and not the heat analysis.
5.4 Mechanical properties
5.4.1 Ordering conditions
5.4.1.1 Zinc-coated and zinc-iron alloy-coated steel sheet of designations 02, 03, 04 and 05 are supplied
under either of the following two ordering conditions:
a) Ordering condition A): steel sheet mechanical properties shall, at the time the steel is made available
for shipment, satisfy the applicable requirements of Table 4, when they are determined on test pieces
obtained in accordance with the requirements in Clause 7.
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ISO/DIS 3575:2015(E)

b) Ordering condition B): steel sheet, ordered to make an identified part, shall be supplied with
a commitment for satisfactory manufacturing performance within an established breakage
allowance, which shall be previously agreed upon by the interested parties. In the agreement, the
part name, the details of fabrication, and special requirements (such as freedom from stretcher
strain or fluting) shall be specified.
NOTE In the case of ordering condition B, mechanical properties of the steel sheet may also be agreed upon
by the interested parties and such properties may not necessarily satisfy the requirements of Table 4.
5.4.2 Fabrication qualities
Zinc-coated and zinc-iron alloy-coated steel sheet is available in several fabrication qualities as given
in 3.1 to 3.5.
5.4.3 Interstitial free steel
5.4.3.1 Stabilized interstitial free steel (IF Steel) is applicable to orders for designations 03, 04 and 05;
provided that the purchaser is informed of the substitution and that related shipping documents reflect
the actual material shipped.
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ISO/DIS 3575:2015(E)

Table 4 — Mechanical properties
R A
m
R
e,f,g e,f,g
eL
r n
c d
max. min.
a b
Base-metal quality max.
h min. min.
MPa
MPa %
i
Designation Name L = 80 mm L = 50 mm L = 5,65√ S
o o o o
01 Commercial — — — — — — —
j
02 Drawing 300 430 24 23 22 — —
03 Deep drawing 260 410 26 25 24 — —
Deep drawing
04 220 410 29 28 27 — —
aluminium killed
Extra deep draw-
05 200 350 37 36 35 1,4 0,17
ing stabilized
R = lower yield strength
eL
R = tensile strength
m
A = percent elongation after fracture
L = gauge length of original test piece
o
S = original cross-sectional area of gauge length
o
r = index of drawability of the product
n = index of the stretchability of the product
NOTE 1 Time period from date of shipment for values stated in this table to be applicable.
Designation Time period
—
02 8 days
03 1 month
04 6 months
05 6 months
NOTE 2 For products produced according to performance criteria (ordering condition B), the typical mechanical properties
presented here are non-mandatory. For products specified according to mechanical properties (ordering condition A), the
purchaser may negotiate with the manufacturer if a specific range, or a more restrictive range, is required for the application.
When agreed to, such values may be specified.
NOTE 3 With the exception of footnotes d and e, these typical mechanical properties apply to the full range of steel sheet
thicknesses. The yield strength tends to increase and the formability tends to decrease as the sheet thickness decreases.
a
All qualities are available with a normal spangle, minimized spangle or skin passed finish for Z coating designations,
and with a matte or skin passed finish for ZF coating designations.
b
The values apply to 0,2 % proof strength when a definite yield phenomenon is not present, otherwise to the lower yield
strength (R ).
eL
c
Minimum tensile strength for qualities 02, 03, 04 and 05 would normally be expected to be 270 MPa. All tensile strength
values are determined to the nearest 10 MPa.
d
For material up to and including 0,6 mm in thickness, the elongation values in the table shall be reduced by 2.
e
r and n values are only applicable to thickness 0,5 mm. For thickness > 2,0 mm, the r value is reduced by 0,2.
f
r can also be written as r-bar and n can also be written as n-bar.
g
r and n values may be modified or excluded from this specification, by agreement between the producer and the
purchaser.
h 2
1 MPa = 1 N/mm .
i
May be used for material over 3 mm in thickness.
j
This value applies to skin-passed products only.
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ISO/DIS 3575:2015(E)

5.5 Coating
5.5.1 Coating mass
The coating mass limits shall conform to the limits for the designations shown in Table 5. The coating
mass is the total amou
...