ISO/FDIS 11949

FINAL DRAFT
International
Standard
ISO/TC 17/SC 9
Cold-reduced tinmill products —
Secretariat: JISC
Electrolytic tinplate
Voting begins on:
Aciers pour emballage laminés à froid — Fer blanc électrolytique 2026-01-28
Voting terminates on:
2026-03-25
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 SUPPOR TING DOCUMENTATION.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO­
LOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT
INTERNATIONAL STANDARDS MAY ON OCCASION HAVE
TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL
TO BECOME STAN DARDS TO WHICH REFERENCE MAY BE
MADE IN NATIONAL REGULATIONS.
Reference number
FINAL DRAFT
International
Standard
ISO/TC 17/SC 9
Cold-reduced tinmill products —
Secretariat: JISC
Electrolytic tinplate
Voting begins on:
Aciers pour emballage laminés à froid — Fer blanc électrolytique
Voting terminates on:
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 SUPPOR TING DOCUMENTATION.
© ISO 2026
IN ADDITION TO THEIR EVALUATION AS
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO­
LOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
INTERNATIONAL STANDARDS MAY ON OCCASION HAVE
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TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL
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TO BECOME STAN DARDS TO WHICH REFERENCE MAY BE
MADE IN NATIONAL REGULATIONS.
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ii
Contents Page
Foreword .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 General technical delivery condition . 4
5 Classification . 4
6 Information to be supplied by the purchaser . 4
6.1 Designation .4
6.2 Mandatory information .5
6.3 Options.5
7 Manufacturing features . 6
7.1 Manufacture.6
7.2 Annealing .6
7.3 Finish .6
7.4 Passivation .7
7.5 Oiling .7
7.6 Imperfections .7
7.6.1 Coils .7
7.6.2 Sheets .7
8 Tin coating mass . 8
9 Mechanical properties . 8
9.1 General .8
9.2 Hardness requirement . .8
9.3 Tensile property requirement .8
10 Tolerances on dimensions and shape . 9
10.1 General .9
10.2 Thickness and feather edge .9
10.2.1 Thickness .9
10.2.2 Feather edge .9
10.3 Width .9
10.4 Length .9
10.4.1 Length of coil .9
10.4.2 Length of sheet .9
10.5 Edge camber .9
10.6 Out-of-squareness of sheet .10
10.7 Flatness .11
10.7.1 Edge wave .11
10.7.2 Longitudinal and transverse bow .11
10.7.3 Centre fullness.11
11 Joint within a coil .11
11.1 General .11
11.2 Number of joints . 12
11.3 Location of joints . 12
11.4 Dimension of joints . 12
11.4.1 Thickness . 12
11.4.2 Overlap . 12
12 Marking of differentially coated cold-reduced tinplate.12
12.1 General . 12
12.2 Marking on heavily coated surface . 12
12.3 Marking on lightly coated surface . 13

iii
12.4 Marking designation. 13
13 Sampling .13
14 Test method .13
14.1 Tin coating mass . 13
14.1.1 Test piece . 13
14.1.2 Method of determination .14
14.2 Hardness test .14
14.2.1 Test piece .14
14.2.2 Test method .14
14.3 Tensile test . 15
14.3.1 Test piece . 15
14.3.2 Test method . 15
14.4 Flatness test . 15
14.4.1 General . 15
14.4.2 Edge wave . 15
14.4.3 Longitudinal or transverse bow .16
14.4.4 Centre fullness.16
15 Retests .18
16 Inspection document .18
17 Dispatch and packaging .18
17.1 Coils .18
17.2 Sheets .19
17.3 Labelling .19
Annex A (normative) Hardness requirements for tinplate .20
Annex B (normative) Tensile property requirements for tinplate .21
Annex C (informative) Steel types .23
Annex D (informative) Springback test for routine determination of R or R for tinplate .24
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Annex E (informative) Alternative marking system for differentially coated tinplate .25
Annex F (normative) Referee method for determining tin coating mass .27
Annex G (normative) Rockwell HR15Tm values and their HR30Tm equivalents .34
Annex H (informative) Types of chromium-free passivation (CFP) .35
Bibliography .36

iv
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 document should be noted. This document was drafted in accordance with the editorial rules of the
ISO/IEC Directives, Part 2 (see www.iso.org/directives).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent
rights in respect thereof. As of the date of publication of this document, ISO had not received notice of (a)
patent(s) which may be required to implement this document. However, implementers are cautioned that
this may not represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and expressions
related to conformity assessment, as well as information about ISO's adherence to the World Trade
Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 17, Steel, Subcommittee SC 9, Tinplate and
blackplate.
This third edition cancels and replaces the second edition (ISO 11949:2016), which has been technically
revised.
The main changes are as follows:
— the maximum nominal thickness for double cold-reduce tinplate has been changed to 0,390 mm, instead
of 0,360 mm (see Clause 1);
— the chromium-free passivation has been specified in addition to the usual chromium passivation (see 6.2
and 7.4);
— former subclause 7.4, “Passivation and Oiling”, has been divided into two subclauses, i.e. passivation (7.4)
and oiling (7.5);
2 2
— the coating mass of 0,6 g/m has been specified for the lowest coating mass, instead of 1,0 g/m (see
Clause 8);
— an option to supply sheet numbers in bulk package other than multiples of 100 has been added (17.2);
— the maximum weight of sheets in bulk package has been increased to up to 3 000 kg instead of 2 000 kg
(17.2);
— several steel grades have been added (see Tables A.1, A.2 and B.1);
— the lower yield strength, R has been specified for CA (9.3, 14.3.2, Annex B, Annex D).
eL
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
FINAL DRAFT International Standard ISO/FDIS 11949:2026(en)
Cold-reduced tinmill products — Electrolytic tinplate
1 Scope
This document specifies requirements for single and double cold-reduced low-carbon mild steel electrolytic
tinplate in the form of sheets or coils.
Single cold-reduced tinplate is generally specified in nominal thicknesses that are multiples of 0,005 mm,
from 0,150 mm up to and including 0,600 mm. Double cold-reduced tinplate is generally specified in nominal
thicknesses that are multiples of 0,005 mm, from 0,100 mm up to and including 0,390 mm.
1)
This document applies to coils and sheets cut from coils in nominal minimum rolling widths of 600 mm.
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 404, Steel and steel products — General technical delivery requirements
ISO 6508-1:2019, Metallic materials — Rockwell hardness test — Part 1: Test method
ISO 6892-1, Metallic materials — Tensile testing — Part 1: Method of test at room temperature
ISO 10474, Steel and steel products — Inspection documents
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
blackplate
cold-reduced low-carbon mild steel, applied for manufacturing electrolytic tinplate
[1]
Note 1 to entry: See ISO 11951 .
3.2
electrolytic tinplate
cold-reduced low-carbon steel sheet or coil coated on both surfaces with tin that is applied in a continuous
electrolytic operation
3.3
differentially coated electrolytic tinplate
cold-reduced electrolytic tinplate, one surface of which carries a heavier tin coating than the other
1) Nominal minimum rolling widths of 500 mm can be applied by agreement between the purchaser and the
manufacturer.
3.4
single cold-reduced
description of product in which the blackplate has been reduced to the desired thickness in a cold-reduction
mill and subsequently annealed and temper rolled
3.5
double cold-reduced
description of product in which the blackplate has had a second major reduction after annealing
3.6
standard grade tinplate sheet
product in sheet form which is confirmed to be suitable, under normal conditions of storage, for established
lacquering and printing over the entire sheet and is
a) free from surface imperfections which render the material unsuitable for the intended use and
b) free from damage which render the material unsuitable for the intended use
Note 1 to entry: The standard material is compliant with the requirements as specified in this document.
3.7
batch annealing
box annealing
BA
process in which the cold-reduced strip is annealed in coil form, within a protective atmosphere, for a
predetermined time-temperature cycle
3.8
continuous annealing
CA
process in which cold-reduced coils are unwound and annealed in strip form within a protective atmosphere
3.9
finish
surface appearance of tinplate, determined by the surface roughness, R , of the steel base together with the
a
conditioning of the tin coating which can be either flow-melted or unflow-melted
3.9.1
smooth finish
appearance of the blackplate resulting from the use of temper-mill work rolls that have been ground to a low
roughness
Note 1 to entry: This finish is used for the production of bright finish tinplate.
3.9.2
bright finish
appearance of the surface on flow-melted tinplate using the smooth finish blackplate
3.9.3
fine stone finish
appearance of the surface on flow-melted tinplate characterized by a directional pattern, resulting from the
use of final mill work rolls that have been ground to a lower level of roughness than those used for stone
finish
3.9.4
stone finish
appearance of the surface on flow-melted tinplate characterized by a directional pattern, resulting from
the use of final-mill work rolls that have been ground to a higher level of roughness than those used for the
smooth finish
3.9.5
silver finish
appearance of the surface resulting from the use of temper-mill work rolls with dull surface textured by
shot blast, electro discharge texturing (EDT), electron beam texturing (EBT) or another suitable method,
together with a flow-melted tin coating
3.9.6
matt finish
appearance of the surface resulting from the use of temper-mill work rolls with dull surface textured by
shot blast, electro discharge texturing (EDT), electron beam texturing (EBT) or another suitable method,
together with an unflow-melted tin coating
3.10
chromium passivation
usual procedure which is a cathodic treatment in an acidic chromium solution resulting in a chromium layer
on the tinplate
3.11
chromium-free passivation
procedure which is a treatment in non-chromium solution resulting in a chromium-free layer on the tinplate
3.12
coil
rolled flat strip product which is wound into regularly superimposed laps so as to form a coil with almost
flat sides
3.13
longitudinal bow
line bow
residual curvature in the strip remaining along the direction of rolling
3.14
transverse bow
cross bow
mode of curvature in the sheet such that the distance between its edges parallel to the direction of rolling is
less than the sheet width
3.15
centre fullness
centre buckle
full centre
intermittent vertical displacement or wave in the strip occurring other than at the edges
Note 1 to entry: See Figure 8.
3.16
edge wave
intermittent vertical displacement occurring at the strip edge when the strip is laid on a flat surface
3.17
feather edge
transverse thickness profile
variation in thickness, characterized by a reduction in thickness close to the edges, at right angles to the
direction of rolling
3.18
edge camber
deviation of edge of coil/sheet from a straight line forming its chord

3.19
rolling width
width of the rolled strip perpendicular to the direction of rolling
3.20
stillage platform
base platform on which sheets are stacked to facilitate packing and ready transportation
3.21
consignment
quantity of material of the same specification made available for dispatch at the same time
3.22
bulk package
bulk
packaging unit comprising a stillage platform, the sheets and packaging material
3.23
line inspection
final inspection of the finished product performed by instruments and/or visual examination at normal
production-line speeds
4 General technical delivery condition
In cases where the technical delivery condition is not specified in this document, then ISO 404 shall apply.
5 Classification
Steel grades for this document are generally classified as non-alloy quality steels.
6 Information to be supplied by the purchaser
6.1 Designation
For the purposes of this document, tinplate is designated in terms of a steel grade classification based either
on the Rockwell HR30Tm hardness values or on the tensile properties. For the hardness requirements, the
steel grade designations shall be in accordance with Annex A; specifically, steel grade designations are given
in Table A.1 for single cold-reduced tinplate and in Table A.2 for double cold-reduced tinplate. For the tensile
properties requirements, the steel grade designations shall be in accordance with Table B.1 of Annex B.
Tinplate covered by this document shall be designated by the following characteristics in the given sequence:
a) a reference to this document, i.e. ISO 11949;
b) the steel grade designation in accordance with Table A.1, Table A.2 or Table B.1;
c) the type of annealing used by the manufacturer (see 7.2);
d) the type of finish (see 7.3);
e) the coating masses and their combinations, D or S (for differentially coated), together with numbers
representing the nominal coating mass on top/bottom surface (see Clause 12);
f) the dimensions, in millimetres:
— for coils, thickness × width;
— for sheets, thickness × width × length.
By agreement, the symbol “× C” after width may be designated for coils.

By agreement, the symbol “w” may be designated after the number for the width to indicate that the number
is the dimension perpendicular to the direction of rolling.
EXAMPLES
Single cold-reduced tinplate sheet, in accordance with this document, steel grade T61, continuously annealing (CA),
stone finish, equally coated with a coating mass of 2,8 g/m , with a thickness of 0,220 mm, a width of 800 mm and a
length of 900 mm is designated:
ISO 11949-T61CA - stone - 2,8/2,8 - 0,220 × 800 × 900
Double cold-reduced tinplate coil, in accordance with this document, steel grade T75, continuously annealing (CA),
2 2 2
stone finish, differentially coated with coating masses of 8,4 g/m and 5,6 g/m , with marking on 5,6 g/m side, with a
thickness of 0,180 mm and a width of 750 mm is designated:
ISO 11949-T75CA - stone - 8,4/D5,6 - 0,180 × 750
Tinplate coil, in accordance with this document, steel grade TH415, continuously annealing (CA), stone finish (ST),
2 2 2
differentially coated with a coating mass of 2,8 g/m and 5,6 g/m , with marking on 5,6 g/m side, with a thickness of
0,200 mm, a width of 750 mm is designated:
ISO 11949- TH415 CA - ST - 2,8/D5,6 - 0,200 × 750 × C
Tinplate sheet, in accordance with this document, steel grade TS520, batch annealing (BA), stone finish, differentially
2 2 2
coated with coating masses of 5,6 g/m and 8,4 g/m , with single line marked on 5,6 g/m side, with a thickness of
0,140 mm, a dimension perpendicular to the direction of rolling of 844 mm and a length of 755 mm is designated:
ISO 11949- TS520 BA - stone - S5,6/8,4 - 0,140 × 844w × 755
6.2 Mandatory information
The following information shall be given in the enquiry and order to assist the manufacturer in supplying
the correct material:
a) the designation as given in 6.1;
b) the quantity, expressed on an area or mass basis, e.g. 50 000 kg of sheets, 100 000 kg of coils;
c) marking requirements for differentially coated tinplate (see Clause 12);
d) the minimum and the maximum coil weight, the minimum and the maximum coil outer diameter, the
coil internal diameter, the core vertical or horizontal and the direction of winding (see 17.1);
e) the maximum weight of bulk package;
f) the type of passivation (see 7.4), the type of chromium passivation or the type of chromium-free
passivation, see Annex H;
g) other inspection documents than that specified by the manufacturer (see Clause 16);
h) end use;
i) any further special requirements.
NOTE Information on appropriate steel grade is suitable for shaping operations, such as stamping, drawing,
folding, beading and bending, and assembly work such as joint forming, soldering and welding. The end use is
important when the steel grade is selected.
6.3 Options
In addition to the information in 6.2, the purchaser may wish to provide additional information to the
manufacturer to ensure that the order requirements are consistent with the end use of the product.
The purchaser shall inform the manufacturer of any modifications to the purchaser's fabrication operations
that will significantly affect the way in which the tinplate is used.

NOTE When ordering double cold-reduced tinplate, the purpose of manufacture for which the material is
intended is generally stated. It is noted that double cold-reduced tinplate is relatively less ductile than single cold-
reduced tinplate and has very distinct directional properties, so for some uses, for example for built-up can bodies, the
direction of rolling is usually stated. When double cold-reduced tinplate is used for built-up can bodies, the direction
of rolling is around the circumference of the can so as to minimize the hazard of flange cracking.
7 Manufacturing features
7.1 Manufacture
Continuously cast, fully-killed steel is applied except when otherwise specified. The examples of the steel
types of tinplate are shown in Annex C.
The steel type of tinplate shall be designed to secure food safety when tinplate is used for food application.
The purchasers should be aware of existing national regulations which may impose limitations on some
elements.
The purity of tin used to produce the coating shall be not less than 99,85 % (mass fraction).
The manufacturing method of tinplate is left to the discretion of the manufacturer and is not specified in
this document.
7.2 Annealing
Annealing of tinplate shall be either batch annealing (BA) or continuous annealing(CA) and shall be specified
by the purchaser at the time of enquiry and order.
7.3 Finish
Tinplate is usually available in the finishes as indicated in Table 1. The type of finish is designated either by
the tinplate finish or the code shown in Table 1.
Table 1 — Typical finishes for tinplate
Blackplate
bc
Tinplate Surface roughness Flow-melt-
a
Code
finish ed
Finish R
a
µm
Bright BT Smooth ≤0,35 Yes
Fine stone FS Fine stone 0,25 – 0,45 Yes
Stone ST Stone 0,35 – 0,60 Yes
Silver AM Matt Yes
≥0,90
Matt MM Matt No
a
By agreement between the purchaser and the manufacturer, another code system may be applied.
b
Values of surface roughness in this table are not mandatory. The values are given for reference in order
to classify the finishes.
c [2]
The measurement of surface roughness is in accordance with ISO 21920-3 .
NOTE The appearance is governed by the following:
a) the surface characteristics of the blackplate principally result from controlled preparation of the work rolls used
during the final stages of temper rolling;
b) the mass of the coating applied;
c) whether the tin layer is flow-melted or unflow-melted.

7.4 Passivation
The surface of electrolytic tinplate is normally subjected to a passivation treatment and to oiling. Passivation,
produced either by a chemical or an electrochemical treatment, gives a surface with an improved resistance
to oxidation and improved suitability for lacquering and printing. Unless otherwise agreed at the time of
ordering, the usual passivation procedure is a cathodic treatment in an acidic chromium solution. The typical
range of this passivation is generally up to 10 mg/m for each side. The type of chromium-free passivation
may be agreed between the purchaser and the manufacturer at the time of ordering.
For measuring the chromium content of the passivation film, the diphenylcarbazide method or the X-ray
flourescence spectrometric method is usually applied. When the X-ray method is applied, it is necessary to
consider the influence of chromium in base metal.
NOTE For the chromium-free passivation, the following types are generally used (see Annex H).
a) zirconium passivation;
b) titanium/zirconium passivation;
c) phosphate passivation.
7.5 Oiling
Under normal conditions of transport and storage, electrolytic tinplate shall be suitable for surface
treatments such as established lacquering and printing operations.
Tinplate coils and sheets are supplied with an oil coating. The oil shall be one that is recognized (i.e. by the
relevant national or international authority) as being suitable for food packaging. Unless otherwise agreed
at the time of ordering, the kind of oil is at the discretion of the manufacturer.
NOTE For the oil, dioctyl sebacate (DOS) is usually used.
7.6 Imperfections
7.6.1 Coils
The manufacturer is expected to employ normal quality control and line inspection procedures to ensure
that the tinplate manufactured is in accordance with the requirements of this document.
However, the production of tinplate coils in continuous-strip mill operations does not afford the opportunity
for removal of all tinplate that do not conform with the requirements of this document.
At the time of shearing, sheets not conforming to the standard grade tinplate sheet shall be set aside by the
purchaser or the purchaser's agent.
The quantity of sheets conforming with this document shall be at least 90 % of any one coil.
List items a) and b) in 3.6 cannot be verified by specific tests. Accordingly, those items are recommended to
be the subject of a special agreement between the purchaser and the manufacturer.
In processing tinplate coil, when the purchaser (or the purchaser's agent) encounters recurring imperfections
which in the purchaser's opinion seem excessive, it is essential, where practicable, that the purchaser stops
processing the coil and advises the manufacturer.
The purchaser is expected to have adequate handling, roller levelling and shearing equipment and inspection
facilities to segregate the sheets not conforming to the standard grade tinplate sheet, and to take reasonable
care during these operations.
7.6.2 Sheets
Sheets shall not contain any imperfections as defined in 3.6.

8 Tin coating mass
The nominal coating mass, on each surface, shall be expressed in grams per square metre. The lowest
value specified in this document shall be 0,6 g/m on each surface, and no upper limit is specified. Values of
2 2 2 2 2 2 2 2
preferred coating masses are 0,6 g/m , 1,0 g/m , 1,4 g/m , 2,0 g/m , 2,8 g/m , 4,0 g/m , 5,0 g/m , 5,6 g/m ,
2 2
8,4 g/m and 11,2 g/m .
Whatever the coating mass used, the coating mass for sample average and for individual sample shall not
be less than the minimum coating mass indicated in Table 2. The coating mass for sample average is the
average of three measurements on each sheet selected. The mass per unit area for equally and differentially
coated tinplate is determined on test pieces taken from samples selected in accordance with Clause 13 and
tested in accordance with 14.1.
Table 2 — Minimum tin coating masses
Range of
Minimum coating mass Minimum coating mass
nominal coating
for sample average for individual sample
mass,m, on each surface
2 2 2
g/m g/m g/m
0,6 ≤ m < 2,8 0,80 × m 0,64 × m
2,8 ≤ m < 5,6 0,87 × m 0,70 × m
5,6 ≤ m 0,90 × m 0,72 × m
The minimum coating mass for sample average and for individual sample shall be rounded to the unit of
0,1 g/m .
9 Mechanical properties
9.1 General
For the purposes of this document, tinplates are classified into steel grades based on either Rockwell
HR30Tm hardness values or tensile properties. The purchaser shall indicate the specification either by
hardness requirement or by tensile properties requirement, but not for both, when ordering the material.
When ordering the material for applications such as drawn cans, DWI cans, twist off caps, etc., it is
recommended to indicate the specification according to the tensile property requirement.
Other mechanical properties might significantly influence the performance of tinplate in processing, and the
subsequent intended end use might vary depending on the steel type and the method of casting, annealing
and temper rolling employed.
At the time of enquiry and order, it shall be agreed that properties of steel grade shall be verified either by
the hardness test or by the tensile test.
9.2 Hardness requirement
The hardness values for tinplate shall be as given in Table A.1 and Table A.2, Annex A when tested as
described in 14.2.
9.3 Tensile property requirement
The proof strength, R , for BA, or the lower yield strength, R , for CA shall be as given in Table B.1, Annex B
p0,2 eL
when tested as described in 14.3.
For routine testing, R or R may be determined using the springback test as described in Annex D.
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However, in cases of dispute, the method described in 14.3 shall be applied.

10 Tolerances on dimensions and shape
10.1 General
Tolerances on dimensions (i.e. thickness, width and length) and shape (i.e. edge camber, out-of-squareness
and flatness) are specified in 10.2 to 10.7, together with appropriate methods of measurement.
10.2 Thickness and feather edge
10.2.1 Thickness
Nominal thickness shall be a multiple of 0,005 mm. Nominal thickness other than multiple of 0,005 mm
may be specified by agreement between the purchaser and the manufacturer. Thickness out of the nominal
thickness range may be specified by agreement between the purchaser and the manufacturer.
5
The thickness of tinplate shall not deviate from the ordered nominal thickness by more than % at any
8
point except within 10 mm from the trimmed-edge.
The thickness shall be measured using micrometer to an accuracy of 0,001 mm.
It is recommended that the micrometer should have a ball-ended shank and a curved-surface base anvil.
NOTE For routine internal quality control purposes, the thickness can also be determined in-line.
10.2.2 Feather edge
For both sheet and coil, the thickness when measured at a d
...