ISO 11951:2016

DRAFT INTERNATIONAL STANDARD
ISO/DIS 11951
ISO/TC 17/SC 9 Secretariat: JISC
Voting begins on: Voting terminates on:
2014-01-09 2014-04-09
Cold-reduced blackplate in coil form for the production of
tinplate or electrolytic chromium/chromium oxide-coated
steel
Fer noir laminé à froid en bobines destiné à la fabrication de fer-blanc ou de fer chromé électrolytique
[Revision of first edition (ISO 11951:1995)]
ICS: 77.140.50
THIS DOCUMENT IS A DRAFT CIRCULATED
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THEREFORE SUBJECT TO CHANGE AND MAY
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Reference number
NATIONAL REGULATIONS.
ISO/DIS 11951:2013(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 2013

ISO/DIS 11951:2013(E)
Copyright notice
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ii © ISO 2013 – All rights reserved

ISO/DIS 11951:2013
Contents Page
Foreword . v
1 Scope . 1
2 Normative references . 1
3 Definitions . 2
4 Classification . 3
5 Information to be supplied by the purchaser . 3
5.1 Designation . 3
5.2 Mandatory information. 4
5.3 Options . 4
6 Manufacturing features . 5
6.1 Manufacture . 5
6.2 Annealing . 5
6.3 Finish . 5
6.4 Oiling. 5
6.5 Imperfections . 6
7 Mechanical properties. 6
7.1 General . 6
7.2 Hardness requirement . 6
7.3 Tensile property requirement . 6
8 Tolerances on dimensions and shape . 6
8.1 General . 6
8.2 Thickness and feather edge . 7
8.3 Coil width . 7
8.4 Coil length . 7
8.5 Edge camber of trimmed coils . 7
8.6 Flatness . 8
9 Joints within a coil . 9
9.1 General . 9
9.2 Number of joints . 9
9.3 Location of joints . 9
9.4 Dimensions of joints . 9
10 Sampling . 10
11 Test methods . 10
11.1 Hardness tests . 10
11.2 Tensile tests . 11
11.3 Flatness tests . 11
12 Retests . 14
13 Inspection document . 14
14 Dispatch and packaging . 14
14.1 Coil orientation . 14
14.2 Labeling . 15
Annex A (normative)  Hardness requirements for blackplate . 16
Annex B (normative)  Tensile property requirements for blackplate . 17
Annex C (Informative) Steel types . 18
ISO/DIS 11951:2013
Annex D (normative) Springback test for routine determination of proof strength for blackplate . 19
Annex E (normative) Rockwell HR15Tm values and their HR30Tm equivalents . 20

iv © ISO 2013 – All rights reserved

ISO/DIS 11951:2013
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.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
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.
ISO/DIS 11951:2013 was prepared by Technical Committee ISO/TC 17, Steel, Subcommittee SC 9, Tinplate
and blackplate.
DRAFT INTERNATIONAL STADARD ISO/DIS 11951:2013

Cold-reduced blackplate in coil form for the production of
electrolytic tinplate or electrolytic chromium/chromium oxide-
coated steel
1 Scope
This International Standard specifies requirements for single and double cold-reduced blackplate in the form
of coils which are intended for manufacturing electrolytic tinplate or electrolytic chromium/chromium oxide-
coated steel (ECCS) in accordance with ISO 11949 or ISO 11950.
In general, single cold-reduced blackplate is specified in nominal thicknesses that are multiples of 0,005 mm,
from 0,15 mm up to and including 0,60 mm. Double cold-reduced blackplate is specified in nominal
thicknesses that are multiples of 0,005 mm, from 0,10 mm up to and including 0,36 mm.
1)
This International Standard applies to coils in nominal minimum rolling widths of 600 mm , with either trimmed
or untrimmed edges.
In addition, the general technical delivery requirements of ISO 404 are applicable.
2 Normative references
The following referenced documents are indispensable for the application of this International Standard. 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 condition
ISO 4288, Geometrical Product Specifications (GPS) – Surface texture : Profile method – Rule and
procedures for the assessment of surface texture
ISO 6508-1:2005, Metallic materials –Rockwell hardness test – Part 1:Test method (scales A, B, C, D, E, F, G,
H, K, N, T).
ISO 6892-1:2009, Metallic materials -Tensile testing – Part 1:Method of test at room temperature.
ISO/TR 9769, Steel and iron – Review of available methods of analysis
ISO 10474, Steel and steel products – Inspection documents
ISO 11949, Cold-reduced electrolytic tinplate.
ISO 11950, Cold-reduced electrolytic chromium/chromium oxide-coated steel.

1) Nominal minimum rolling widths of 500 mm may be applied by agreement between the purchaser and the
manufacturer.
ISO/DIS 11951:2013
3 Definitions
For the purposes of this International Standard, the following definitions apply.
3.1
blackplate:
cold-reduced low-carbon mild steel, normally oiled, for the production of electrolytic tinplate or ECCS in
accordance with ISO 11949 or ISO 11950.
3.2
single cold-reduced:
term used to describe blackplate which has been reduced to the desired thickness in a cold-reduction mill and
subsequently annealed and temper rolled.
3.3
double cold-reduced
term used to describe blackplate which has had a second major reduction after annealing.
3.4
batch annealed; box annealed (BA)
annealed by the process in which the cold-reduced strip is annealed in coil form, within a protective
atmosphere, for a predetermined time-temperature cycle.
3.5
continuously annealed (CA)
annealed by the process in which cold-reduced coils are unwound and annealed in strip form within a
protective atmosphere.
3.6
finish
appearance of the surface of blackplate, resulting from controlled preparation of the work rolls used for the
final stages of rolling.
3.6.1
matt finish
finish resulting from the use of temper-mill work rolls with dull surface textured by Shot Blast, EDT(Electro
Discharge Texturing), EBT (Electron Beam Texturing) and so on,
3.6.2
smooth finish
finish resulting from the use of temper-mill work rolls that have been ground to a low roughness. This finish is
used for the production of bright finish tinplate or smooth finish ECCS.
3.6.3
stone finish
finish 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.
3.7
coil
rolled flat strip product which is wound into regularly superimposed laps so as to form a coil with almost flat
sides.
3.8
longitudinal bow; line bow
residual curvature in the strip remaining along the direction of rolling.
2 © ISO 2013 – All rights reserved

ISO/DIS 11951:2013
3.9
transverse bow; cross bow
mode of curvature in the strip such that the distance between its edges parallel to the direction of rolling is less
than the strip width.
3.10
centre fullness; centre buckle, full centre
intermittent vertical displacement or wave in the strip occurring other than at the edges (see Figure 6).
3.11
edge wave
intermittent vertical displacement occurring at the strip edge when the strip is laid on a flat surface. This
parameter is only applicable to material supplied with trimmed edges.
3.12
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. This parameter is only applicable to material supplied with trimmed edges.
3.14
Edge camber
deviation of edge of coil from a straight line forming its chord.
3.15
burr
metal displaced beyond the plane of the surface of the strip by shearing action.
3.16
rolling width
width of the rolled strip perpendicular to the direction of rolling.
3.17
consignment
quantity of material of the same specification made available for dispatch at the same time.
3.18
pallet
base platform on which a coil is placed to facilitate ready transportation.
3.19
anvil effect
effect which a hard anvil can produce on the numerical hardness value obtained when a hardness test is
performed on very thin material supported on such an anvil.
4 Classification
Steel grades for this International Standard are generally classified as non-alloy quality steels.
5 Information to be supplied by the purchaser
5.1 Designation
For the purposes of this International Standard, blackplate 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 requirement, the steel grade designations are given in Table A.1 for single cold-reduced blackplate
ISO/DIS 11951:2013
and in Table A.2 for double cold-reduced blackplate. For the tensile properties requirement, the steel grade
designations are given in Table B.1.
Blackplate covered by this International Standard shall be designated by the following characteristics in the
given sequence:
a) the number of this International Standard;
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 6.2);
d) the type of finish (see 6.3);
e) the dimensions of the thickness and width, in millimetres;
f) whether mill-edge or trimmed.
EXAMPLE
ISO 11951 - T61 - CA - stone - 0,22 x 800 trimmed
ISO 11951 - T75 - CA - stone - 0,18 x 750 mill-edge
ISO 11951 - TH415 - CA - ST - 0,20 x 750 mill-edge
ISO 11951 - TS520 - BA - stone - 0,14 x 844 trimmed
5.2 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 5.1
b) the quantity, expressed on a mass basis;
c) the orientation of the coils on delivery, i.e. with the cores vertical or horizontal (see 14.1);
d) whether the coil shall be supplied with the edges trimmed or not.
e) whether the coil shall be coated with a suitable oil or not.
NOTE Appropriate classifications are suitable for shaping operations such as stamping, drawing, folding, beading
and bending, and assembly work such as joint forming and welding. The end use should be borne in mind when the
classification is selected.
5.3 Options
When ordering, the purchaser shall supply all the necessary information concerning
a) his production facilities which he anticipates will be appropriate to the ordered blackplate;
b) the intended end use.
4 © ISO 2013 – All rights reserved

ISO/DIS 11951:2013
6 Manufacturing features
6.1 Manufacture
Continuously cast, fully-killed steel is applied except when otherwise specified. The examples of the steel
types of blackplate are shown in Annex C.
The steel type of blackplate shall be designed to secure food safety if blackplate is applied for food application.
The purchasers should be aware of existing national regulations which may impose limitations on some
elements.
The methods of manufacture of blackplate are the province of the manufacturer and are not specified in this
International Standard.
NOTE It is recommended that the manufacturer supplies to the purchaser such details of the manufacturing process
as may assist the purchaser in his efficient use of the blackplate.
6.2 Annealing
Annealing of blackplate shall be either batch annealing (BA) or continuous annealing(CA), and shall be
specified by the purchaser at the time of enquiry and order.
6.3 Finish
Blackplate is usually available in the finishes as indicated in Table 1.
Table 1 — Typical finishes for blackplate
a) b)
Finish Code Surface roughness
Ra µm
Smooth ≤0,35
Fine stone FS 0,25 – 0,45
Stone ST
0,35 – 0,60
Matt MM ≥ 0,90
a)
By agreement between the purchaser and the

manufacture, another code system may be applied.
b)
Values of surface roughness in this table are not
normative. The values are reference to classify the finishes.

NOTE 1 Double cold-reduced blackplate is usually supplied with a stone finish.
NOTE 2 For guidance on the measurement of surface roughness, refer to ISO 4288.
6.4 Oiling
To avoid corrosion, blackplate shall normally be supplied with a sufficient layer of a suitable, non-mineral,
protective oil. The oil shall be removed by an adequate inline cleaning process before any subsequent coating.
If blackplate is required without an oil coating, this shall be indicated at the time of ordering.
NOTE If unoiled blackplate is supplied, there is an increased risk of surface corrosion.
ISO/DIS 11951:2013
6.5 Imperfections
The production of blackplate coils in continuous-strip mill operations does not afford the opportunity for
removal of all blackplate that does not comply with the requirements of this International Standard.
However the manufacturer has to ensure that in coils complying to this International Standard at least 90% of
the coil can be used for producing electrolytic tinplate or chromium / chromium oxide coated steel sheets
which is :
a) free from surface imperfections which render the material unsuitable for the intended use
b) free from damage which render the material unsuitable for intended use
c) compliant to the requirements as specified in this International Standard
The purchaser is expected to have adequate handling and roller levelling equipment and inspection facilities,
and to take reasonable care during these operations.
7 Mechanical properties
7.1 General
For the purposes of this International Standard, blackplates 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.
Other mechanical properties may significantly influence the performance of blackpla
...