SIST EN 10202:2022

SLOVENSKI STANDARD
01-april-2022
Nadomešča:
SIST EN 10202:2002
SIST EN 10202:2002/AC:2004
Hladno valjani jekleni izdelki za embalažo - Elektrolizno pokositreni in pokromani
izdelki
Cold reduced tinmill products - Electrolytic tinplate and electrolytic chromium/chromium
oxide coated steel
Kaltgewalzte Verpackungsblecherzeugnisse - Elektrolytisch verzinnter und
spezialverchromter Stahl
Aciers pour emballage laminés à froid - Fer blanc électrolytique et fer chromé
électrolytique
Ta slovenski standard je istoveten z: EN 10202:2022
ICS:
77.140.50 Ploščati jekleni izdelki in Flat steel products and semi-
polizdelki products
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 10202
EUROPEAN STANDARD
NORME EUROPÉENNE
February 2022
EUROPÄISCHE NORM
ICS 77.140.50 Supersedes EN 10202:2001
English Version
Cold reduced tinmill products - Electrolytic tinplate and
electrolytic chromium/chromium oxide coated steel
Aciers pour emballage laminés à froid - Fer blanc Kaltgewalzte Verpackungsblecherzeugnisse -
électrolytique et acier revêtu de chrome/d'oxyde de Elektrolytisch verzinnter und spezialverchromter Stahl
chrome électrolytique
This European Standard was approved by CEN on 26 December 2021.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 10202:2022 E
worldwide for CEN national Members.

Contents Page
European foreword . 6
1 Scope . 8
2 Normative references . 8
3 Terms and definitions . 8
4 Classification and designation . 12
4.1 Classification. 12
4.2 Designation . 12
5 Information to be supplied by the purchaser . 12
5.1 Mandatory information . 12
5.2 Options . 13
5.3 Ordering examples . 13
6 Manufacturing features . 13
6.1 Steelmaking process . 13
6.2 Annealing . 14
6.3 Finish . 14
6.4 Passivation . 15
6.4.1 General. 15
6.4.2 Titanium / Zirconium passivation . 15
6.4.3 Chromium passivation . 15
6.5 Oiling . 16
6.6 Imperfections . 16
6.6.1 Coils . 16
6.6.2 Sheets . 16
7 Coatings . 17
7.1 Electrolytic tinplate . 17
7.1.1 Properties . 17
7.1.2 Test method . 18
7.2 Electrolytic chromium coated steel . 18
7.2.1 General. 18
7.2.2 Test method . 19
8 Mechanical properties . 19
8.1 General. 19
8.2 Tensile test measurement . 20
8.2.1 General. 20
8.2.2 Location of test pieces . 20
8.2.3 Aging . 20
8.2.4 Thickness . 20
8.2.5 Testing conditions . 20
8.2.6 Strength characteristics . 20
8.3 Mechanical properties of tinmill products . 24
9 Tolerances on dimensions and shape . 26
9.1 General. 26
9.2 Thickness and feather edge . 26
9.2.1 Thickness . 26
9.2.2 Test method for thickness . 26
9.2.3 Feather edge . 26
9.2.4 Test method for feather edge . 26
9.3 Linear dimensions . 27
9.3.1 Width and length . 27
9.3.2 Out-of-squareness of sheets. 27
9.3.3 Short pitch camber (lateral weave) of coils . 28
9.3.4 Test method for short pitch camber . 28
9.4 Shape . 29
9.4.1 Edge wave . 29
9.4.2 Test method for edge wave . 29
9.4.3 Bow . 29
9.4.4 Test method for bow. 30
9.4.5 Centre fullness . 30
9.4.6 Test method for centre fullness. 31
9.4.7 Burr . 32
10 Welds within a coil . 32
10.1 General . 32
10.2 Number of welds . 32
10.3 Location of welds . 32
10.4 Dimensions of welds . 32
10.4.1 Thickness . 32
10.4.2 Overlap . 33
11 Marking of differentially coated cold reduced tinplate . 33
12 Selection of samples . 33
12.1 For quality control. 33
12.2 In case of dispute . 34
13 Retests . 34
14 Dispatch and packaging . 35
14.1 Coils . 35
14.1.1 Coil dispatch . 35
14.1.2 Coil winding . 35
14.2 Sheets . 35
Annex A (informative) De-tinning . 36
A.1 Principle . 36
A.2 Clarke’s solution . 36
A.3 Procedure . 36
Annex B (normative) Determination of chromium using the diphenylcarbazide method . 37
B.1 General . 37
B.2 Principle . 37
B.3 Reagent . 37
B.4 Apparatus . 37
B.5 Procedure . 37
B.6 Calibration. 38
Annex C (normative) Determination of titanium content using the Inductively Coupled
Plasma (ICP) method . 39
C.1 General. 39
C.2 Principle . 39
C.3 Reagent . 39
C.4 Apparatus . 40
C.5 Procedure . 40
Annex D (normative) Determination of tin oxides by galvanostatic potentiometry . 41
D.1 General. 41
D.2 Principle . 41
D.3 Reagents . 41
D.4 Apparatus . 41
D.5 Procedure . 41
Annex E (normative) Electromechanical method for determining tin coating mass . 43
E.1 Principle . 43
E.2 Reagents . 43
E.3 Apparatus . 43
E.3.1 Cell and electrodes . 43
E.3.2 Power supply . 43
E.3.3 Voltmeter . 43
E.4 Procedure . 43
E.5 Calibration of the measuring system . 43
E.6 Calculation . 44
Annex F (normative) Methods for determination of metallic chromium and chromium in the
oxide on the surface of electrolytic chromium coated steel (ECCS or ECCS-RC) . 47
F.1 Determination of chromium in the oxide . 47
F.1.1 Principle . 47
F.1.2 Reagents . 47
F.1.3 Apparatus . 47
F.1.4 Preparation of the chromium calibration curve . 48
F.1.5 Procedure . 48
F.1.6 Calculation . 48
F.2 Determination of metallic chromium . 48
F.2.1 Principle . 48
F.2.2 Reagents . 49
F.2.3 Apparatus . 49
F.2.4 Preparation of the chromium calibration curve . 49
F.2.5 Procedure . 50
F.2.5.1 General . 50
F.2.5.2 Removal of chromium oxide layer . 50
F.2.5.3 Removal and determination of metallic chromium . 50
F.2.6 Calculation . 50
Annex G (informative) The Rockwell Hardness test for routine determination of proof
strength for double reduced materials . 54
G.1 General . 54
G.2 Test pieces . 54
G.3 Test method . 54
G.4 Hardness for tinmill products . 56
Annex H (informative) The springback test for routine determination of proof strength for
double reduced material. 57
H.1 General . 57
H.2 Principle . 57
H.3 Test pieces . 57
H.4 Test method . 57
Annex I (normative) Tensile testing conditions in case of dispute . 58
I.1 General . 58
I.2 Tensile test piece dimensions . 58
I.3 Elongation measurement. 58
I.4 Testing velocity . 58
I.4.1 General . 58
I.4.2 Material displaying no discontinuous yielding . 58
I.4.3 Discontinuous yielding material . 59
Annex J (informative) Indicative tensile strength of tinmill products . 60
Annex K (informative) Alternative marking system for electrolytic tinplate — differentially
coated . 61
Bibliography . 63

European foreword
This document (EN 10202:2022) has been prepared by Technical Committee CEN/TC 459 “ECISS -
European Committee for Iron and Steel Standardization” , the secretariat of which is held by AFNOR.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by August 2022, and conflicting national standards shall be
withdrawn at the latest by August 2022.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN 10202:2001.
In comparison with the previous edition, the following technical modifications have been made:
— normative references have been updated;
— revision of the definition of electrolytic chromium coated steel with the addition of the symbol ECCS-
RC which allows the use of a trivalent process;
— rewording of Clause 5 with the split into mandatory information (5.1) and options (5.2);
— modification of Clause 6 with the rewording of 6.1 and the addition of 6.2 and 6.3 about annealing
and finish respectively;
— Table 1 has been updated;
— major modifications of 6.4 about passivation;
— addition of a new subclause 6.6 on imperfections that includes 6.6.1 and 6.6.2 for coils and sheets
respectively;
— major modifications of Clause 7 about coatings including changes of Table 2, Table 3 and Table 4;
— major modifications of Clause 8 about mechanical properties with the addition of stress-strain curves
for batch and continuous annealed material, curve showing the plateau height for continuous
annealed material and stress-strain curves for the determination of the yield strength of some
continuous annealed grades;
— removal of the tensile strength values from Table 5 and transfer into informative Annex J;
— modification of 9.4.6 about test method for centre fullness;
— modifications of the ordering of Annexes;
— new Annex I about tensile testing conditions in case of dispute;
— deletion of the Annex giving the previous designations and of the Annex giving examples of steel
types and chemical composition.

Through its sub-committee SC 9 “Coated and uncoated flat products to be used for cold forming” (secretariat:
AFNOR).
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organisations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia,
Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland,
Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of North
Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United
Kingdom.
1 Scope
This document specifies requirements for tinmill products in the form of sheets or coils. Tinmill products
consist of single and double reduced low carbon mild steel electrolytically coated with either tin (tinplate)
or chromium/chromium oxide (ECCS) or (ECCS-RC) (see 3.3).
Single reduced tinmill products are specified in nominal thicknesses that are multiples of 0,005 mm from
0,16 mm up to and including 0,49 mm. Double reduced tinmill products are specified in nominal
thicknesses that are multiples of 0,005 mm from 0,12 mm up to and including 0,29 mm.
NOTE 1 Other thicknesses can be ordered upon agreement.
This document applies to coils and sheets cut from coils in nominal minimum widths of 600 mm.
NOTE 2 Standard width coils for specific uses, e.g. tabstock, can be slit into narrow strip for supply in coil form.
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.
EN 610, Tin and tin alloys - Ingot tin
EN 10204, Metallic products - Types of inspection documents
EN 10334:2005, Steel for packaging - Flat steel products intended for use in contact with foodstuffs,
products and beverages for human and animal consumption - Non-coated steel (blackplate)
EN ISO 6892-1:2019, Metallic materials - Tensile testing - Part 1: Method of test at room temperature
(ISO 6892-1:2019)
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:
— IEC Electropedia: available at https://www.electropedia.org/
— ISO Online browsing platform: available at https://www.iso.org/obp
3.1
electrolytic tinplate
cold reduced low carbon mild steel sheet or coil coated on both surfaces with tin that is applied in
continuous electrolytic operation
3.2
differentially coated electrolytic tinplate
electrolytic tinplate, one surface of which carries a heavier tin coating than the other
Note 1 to entry: In some cases, one surface does not have any tin coating.
3.3
electrolytic chromium coated steel
ECCS
ECCS-RC
cold reduced low carbon mild steel sheet or coil electrolytically treated to produce on both surfaces a
duplex film of metallic chromium adjacent to the steel substrate with a top layer of hydrated chromium
oxides or hydroxides
Note 1 to entry: This can either be produced by a hexavalent chromium process (ECCS) or by a trivalent chromium
process (ECCS-RC).
3.4
blackplate
cold-reduced low-carbon mild steel, applied for manufacturing electrolytic metallic coated plate
3.5
single reduced
product in which the blackplate has been reduced to the desired thickness in a cold-reduction mill and
subsequently annealed and temper rolled
3.6
double reduced
product in which the blackplate has been reduced to the desired thickness in a cold-reduction mill and
subsequently annealed and temper rolled mostly with the help of a water-based lubricant to achieve a
higher gauge reduction often in excess of 5%
3.7
temper rolling
secondary rolling process to obtain desired roughness and mechanical properties
3.8
standard grade
material in sheet or coil form that is suitable, under normal conditions of storage, for its ordered use
3.9
batch annealed
box annealed
BA
process in which the cold reduced strip is heated in tight coil form, within a controlled atmosphere, for a
pre-determined time/temperature cycle
3.10
continuously annealed
CA
process in which cold reduced coils are unwound and heated in strip form within a controlled atmosphere
for a pre-determined time/temperature cycle
3.11
finish
surface appearance of tinmill products determined by the surface characteristics of the steel base
together with the condition of the coating, either flow-melted or unflow-melted
3.11.1
flow-melting
process by which the ‘as deposited’ tin is heated above its melting point of 232 °C and is quickly quenched
in cool water resulting in a composite coating iron/tin alloy and free tin which exhibits a bright reflective
appearance
3.11.2
bright finish
finish resulting from the use of temper mill work rolls that have been ground to a high degree of polish
and, in the case of tinplate, together with a flow-melted tin coating
3.11.3
stone finish
fine stone finish
finish characterized by a directional pattern, resulting from the use of final mill work rolls that have been
ground to a lower degree of polish than those used for the bright finish, in the case of tinplate together
with a flow-melted tin coating
3.11.4
silver finish
finish resulting from the use of temper mill work rolls with surface textured by shot blast, electro
discharge texturing (EDT), electron beam texturing (EBDT) or another similar method, together with a
flow-melted tin coating
3.11.5
matt finish
finish resulting from the use of temper mill work rolls with surface textured by shot blast, electro
discharge texturing (EDT), electron beam texturing (EBDT) or another similar method, together with an
unflow-melted tin coating
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
bow
residual curvature in sheet or coil such that the distance between the edges is less than the appropriate
sheet or coil dimension
3.13.1
longitudinal bow
line bow
residual curvature in the strip remaining along the direction of rolling
3.13.2
transverse bow
cross bow
mode of curvature in the sheet such that the distances between its edges parallel to the rolling direction
is less than the sheet width
3.14
centre fullness
full centre
centre buckle
intermittent vertical displacement occurring other than at the edge of the sheet or coil when the material
is laid on a flat horizontal surface
3.15
short pitch camber
deviation of the coil from a straight line forming its chord
3.16
edge wave
intermittent vertical displacement occurring at the edge of a sheet or a sample from a coil when laid on a
flat horizontal surface
3.17
feather edge
transverse thickness profile
variation in thickness, characterized by a reduction of thickness close to the edges, at right angles to the
rolling direction
3.18
burr
metal displaced beyond the plane of the surface of the strip by shearing action
3.19
rolling width
width of the strip perpendicular to the rolling direction
3.20
consignment
quantity of material of the same specification made available for dispatch at the same time
3.21
bulk package
packaging unit comprising a stillage platform, the sheets and packaging material
3.22
stillage platform
platform on which sheets are stacked to facilitate packing and ready transportation
3.23
line inspection
final inspection of the finished product performed by instruments and/or by visual examination at
normal production line speeds
3.24
SITA
2 2
area of 100 m of material taken from a total surface area of 200 m
4 Classification and designation
4.1 Classification
The classification of the relevant steel grades is according to EN 10020. Steel grades for this document
are generally classified as non-alloy quality steels, but in some cases low-alloy quality steels may be
encountered.
4.2 Designation
For the steel grades covered by this document, the steel names as given in the relevant tables are allocated
in accordance with EN 10027-1. TS grades are batch annealed grades and TH grades are continuous
annealed grades. The steel numbers as given in the relevant tables are allocated in accordance with
EN 10027-2. See ordering examples below (see 5.3).
5 Information to be supplied by the purchaser
5.1 Mandatory information
The following information shall be given by the purchaser on the enquiry and order to assist the
manufacturer in supplying the correct material:
a) quantity expressed as an area (square metres or SITA's) or mass (tons);
b) description of the material (coil or sheet) and type of metallic coating (typically tin or chromium);
c) dimensions in millimetres:
— for coil: thickness X width;
— for sheets: thickness X rolling width X cutting length;
d) number of this document (EN 10202:2022);
e) steel name or steel number (see Table 5);
f) type of annealing;
g) finish (see Table 1);
h) in the case of tinplate, the coating masses and their combinations, E (for equally coated) or D (for
differentially coated marked) described in Clause 11 (standard marking); in the case of chromium
coated steel specify ECCS or ECCS-RC;
i) in the case of tinplate, the passivation (see 6.4);
j) type of oiling;
k) intended use of the material e.g. stamping, drawing, beading, bending and assembly work such as joint
forming, soldering and welding, surface coating (metallic and organic coating);
l) dispatch and packaging conditions (see Clause 14), e.g. inner diameter of coils, coils core vertical or
horizontal and the coil winding direction if core vertical, maximum and minimum mass and/or
outside diameter of coils;
m) maximum weight of bulk package for sheets, direction of runners if is different from 14.2;
n) if required standard designation for a test report 2.2 or an inspection certificate 3.1 or 3.2 in
accordance with EN 10204.
5.2 Options
In addition to the information in 5.1, the purchaser shall provide further information to the supplier to
ensure that the order requirements are consistent with the end use of the product.
It is generally recommended that supplier and purchaser agree on the best product specifications to fit
the targeted use and other requirements. Eventually, the purchaser is responsible for the product
designation in the order (see 5.3).
The purchaser shall inform the supplier of any modifications to its manufacturing process that will
significantly affect the way in which the tinmill products are used.
It should be noted that double cold reduced tinmill products are relatively less ductile than single cold
reduced products and have very distinct directional properties, so for some uses, e.g. for three-piece can
bodies, the direction of rolling should be stated.
When double cold reduced products are used for three-piece can bodies, it is recommended to have the
can weld perpendicular to the strip rolling direction so as to minimize the hazard of flange cracking.
5.3 Ordering examples
EXAMPLE 1 10 t of tinplate in sheet, in accordance with this document of steel grade TS275, batch annealed,
stone finish, equally coated with a coating mass of 2,8 g/m , passivation 311, with a thickness of 0,22 mm, a rolling
width of 800 mm and cut length of 900 mm is designated:
10 t tinplate sheet EN 10202-TS275-BA-ST-E2,8/2,8-311-0,22 × 800 × 900
EXAMPLE 2 10 t of tinplate in coil in accordance with this document, of steel grade TH620, continuously
2 2
annealed, stone finish, differentially coated with coating masses of 8,4 g/m and 5,6 g/m , and marking on side
8,4 g/m positioned on the outside of coil, passivation Titanium/Zirconium 555 with a thickness of 0,18 mm and a
rolling width of 750 mm is designated:
10 t tinplate coil EN 10202-TH620-CA-ST-D8,4/5,6-555-0,18 × 750
EXAMPLE 3 10 t of chromium coated steel (ECCS or ECCS-RC) in coil in accordance with this document, of
steel grade TH550, continuously annealed, fine stone finish, with a thickness of 0,185 mm and a rolling width of
750 mm is designated:
10 t ECCS coil EN 10202-TH550-CA-FS-ECCS-0,185 × 750
10 t ECCS-RC coil EN 10202-TH550-CA-FS-ECCS-RC −0,185 × 750
NOTE These ordering examples do not cover all the specifications of the products; further mandatory
information is requested; see 5.1.
6 Manufacturing features
6.1 Steelmaking process
The steelmaking process is under the responsibility of the manufacturer with the exception that the steel
is continuously cast. All steels shall be fully killed.
The purchaser should be informed of any change made to the method of manufacture if the manufacturer
suspects that the change may affect the ordered end use of the product.
If the product is ordered for food contact, the product should be manufactured in accordance with food
safety regulations. The steel shall be manufactured according to EN 10334:2005, 6.2.
If the product is not ordered for food contact, a different steelmaking process may be agreed between
manufacturer and purchaser.
The purchaser shall inform the manufacturer about all relevant regulations which may influence the
manufacturing of the product.
Each product shall be traceable to the cast.
6.2 Annealing
Annealing for tinmill products shall be either batch annealing or continuous annealing and shall be
specified by the purchaser at the time of enquiry and order (see 5.1 f).
NOTE The forming properties of tinmill products will differ depending on the type of annealing employed.
6.3 Finish
Tinplate is usually available in the finishes as indicated in Table 1. The type of finish is designated by the
product finish or the code shown in Table 1.
Table 1 — Recognized finishes
Flow-
Nominal surface
Product melted
Code Steel base roughness of the
finish (tinplate
steel base
only)
µm R
a
Bright
BR Smooth Yes ≤ 0,35
(tinplate only)
Fine stone FS Fine stone Yes 0,25 - 0,45
Stone ST Stone Yes 0,35 - 0,60
Silver Shot blast or
SG Yes ≥ 0,90
(tinplate only) alternative
Shot blast or
Matt MM No Various
alternative
NOTE 1 The appearance is governed by:
a) the surface characteristics of the steel base, which principally result from controlled preparation of
the work rolls used during the final stages of temper rolling;
b) the mass of the applied coating; and
c) whether the tin layer is flow-melted or unflow-melted.
NOTE 2 Special surface finishes are available by agreement at the time of ordering for example: tin unmelted or
other surface roughnesses.
NOTE 3 For shot blast, alternative roll preparation is possible, for example: EDT, EBDT or another similar
method.
NOTE 4
...