SIST EN 10202:2022

Cold reduced tinmill products - Electrolytic tinplate and electrolytic chromium/chromium oxide coated steel

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.

Kaltgewalzte Verpackungsblecherzeugnisse - Elektrolytisch verzinnter und spezialverchromter Stahl

Dieses Dokument legt die Anforderungen an Verpackungsblecherzeugnisse in Form von Tafeln oder von Coils fest. Verpackungsblecherzeugnisse sind einfach kaltgewalzte oder doppeltreduzierte weiche Stähle, die entweder elektrolytisch verzinnt (Weißblech) oder elektrolytisch spezialverchromt (ECCS) oder (ECCS-RC) (siehe 3.3).
Einfach kaltgewalzte Verpackungsblecherzeugnisse werden in Nenndicken von 0,16 mm bis 0,49 mm in Stufen von 0,005 mm geliefert. Doppeltreduzierte Verpackungsblecherzeugnisse werden in Nenndicken von 0,12 mm bis 0,29 mm in Stufen von 0,005 mm geliefert.
ANMERKUNG 1   Auf Anfrage können auch andere Dicken bestellt werden.
Dieses Dokument gilt für Band in Rollen und für aus Band geschnittene Tafeln in Nennbreiten von mindestens 600 mm.
ANMERKUNG 2   Für besondere Anwendungen, z. B. "Laschenband", darf das Band auch als durch Längsteilen hergestelltes schmaleres Band in Rollen geliefert werden.

Aciers pour emballage laminés à froid - Fer blanc électrolytique et fer chromé électrolytique

Le présent document spécifie les exigences relatives aux aciers pour emballage sous la forme de feuilles ou de bobines. Les aciers pour emballage sont constitués d’acier doux à faible teneur en carbone à simple et double laminage recouvert par électrolyse d’étain (fer blanc) ou de chrome ou d’oxyde de chrome (ECCS ou ECCS-RC) (voir 3.3).
Les aciers pour emballage à simple laminage sont spécifiés dans des épaisseurs nominales qui sont des multiples de 0,005 mm à partir de 0,16 mm jusqu’à 0,49 mm inclus. Les aciers pour emballage à double laminage sont spécifiés dans des épaisseurs nominales qui sont des multiples de 0,005 mm à partir de 0,12 mm jusqu’à 0,29 mm inclus.
NOTE 1   Après accord, il est possible de commander d’autres épaisseurs.
Le présent document s’applique aux bobines et aux feuilles découpées dans des bobines dont les largeurs nominales sont égales à 600 mm au minimum.
NOTE 2   Les bobines de largeurs normalisées pour usages spéciaux, tels que feuillard, peuvent être découpées en bandes refendues à longueur pour conditionnement en bobines.

Hladno valjani jekleni izdelki za embalažo - Elektrolizno pokositreni in pokromani izdelki

Ta dokument določa zahteve za jeklene izdelke za embalažo v obliki plošč ali zvitkov. Jekleni izdelki za embalažo vključujejo enkrat in dvakrat valjano maloogljično mehko jeklo, elektrolitsko prevlečeno s kositrom (bela pločevina) ali kromom/kromovim oksidom (ECCS) oz. (ECCS-RC) (glej točko 3.3).
Enkrat valjani jekleni izdelki za embalažo so podani z nazivnimi debelinami, ki so večkratniki vrednosti 0,005 mm v razponu od 0,16 mm do vključno 0,49 mm. Dvakrat valjani jekleni izdelki za embalažo so podani z nazivnimi debelinami, ki so večkratniki vrednosti 0,005 mm v razponu od 0,12 mm do vključno 0,29 mm.
OPOMBA 1:   Po dogovoru je mogoče naročiti druge debeline.
Ta dokument se uporablja za zvitke in plošče, izrezane iz zvitkov, z najmanjšo nazivno širino 600 mm.
OPOMBA 2:   Zvitke s standardno širino za specifično uporabo (npr. zavihki na pločevinkah) je mogoče narezati v ozke trakove za dobavo v obliki zvitkov.

General Information

• Status: Published
• Public Enquiry End Date: 28-Apr-2021
• Publication Date: 02-Mar-2022
• ICS: 77.140.50 - Flat steel products and semi-products
• Technical Committee: IFEK - Ferrous metals
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 02-Mar-2022
• Due Date: 07-May-2022
• Completion Date: 03-Mar-2022
• Ref Project: EN 10202:2022 - Cold reduced tinmill products - Electrolytic tinplate and electrolytic chromium/chromium oxide coated steel

Relations

• Replaces: SIST EN 10202:2002/AC:2004 - Cold reduced tinmill products - Electrolytic tinplate and electrolytic chromium/chromium oxide coated steel
• Effective Date: 02-Mar-2022
• Replaces: SIST EN 10202:2002 - Cold reduced tinmill products - Electrolytic tinplate and electrolytic chromium/chromium oxide coated steel
• Effective Date: 02-Mar-2022
• Replaces: SIST EN 10202:2002 - Cold reduced tinmill products - Electrolytic tinplate and electrolytic chromium/chromium oxide coated steel
• Effective Date: 08-Jun-2022

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN 10202:2022
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
SIST EN 10202:2022 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 10202:2022

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SIST EN 10202:2022


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.

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SIST EN 10202:2022
EN 10202:2022 (E)
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
2

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SIST EN 10202:2022
EN 10202:2022 (E)
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
3

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SIST EN 10202:2022
EN 10202:2022 (E)
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
4

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SIST EN 10202:2022
EN 10202:2022 (E)
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

5

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SIST EN 10202:2022
EN 10202:2022 (E)
European foreword
This document (EN 10202:2022) has been prepared by Technical Committee CEN/TC 459 “ECISS -
1
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.

1
Through its sub-committee SC 9 “Coated and uncoated flat products to be used for cold forming” (secretariat:
AFNOR).
6

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SIST EN 10202:2022
EN 10202:2022 (E)
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.
7

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...

SLOVENSKI STANDARD
oSIST prEN 10202:2021
01-april-2021
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: prEN 10202
ICS:
77.140.50 Ploščati jekleni izdelki in Flat steel products and semi-
polizdelki products
oSIST prEN 10202:2021 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN 10202:2021

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oSIST prEN 10202:2021


DRAFT
EUROPEAN STANDARD
prEN 10202
NORME EUROPÉENNE

EUROPÄISCHE NORM

February 2021
ICS 77.140.50 Will supersede 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 fer chromé électrolytique Elektrolytisch verzinnter und spezialverchromter Stahl
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 459/SC 9.

If this draft becomes a European Standard, 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.

This draft European Standard was established by CEN 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.

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.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.


EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 10202:2021 E
worldwide for CEN national Members.

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oSIST prEN 10202:2021
prEN 10202:2021 (E)
Contents Page
European foreword . 6
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 7
4 Classification and designation . 11
4.1 Classification. 11
4.2 Designation . 11
5 Information to be supplied by the purchaser . 11
5.1 Mandatory information . 11
5.2 Options . 12
5.3 Ordering examples . 12
6 Manufacturing features . 12
6.1 Steelmaking process . 12
6.2 Annealing . 13
6.3 Finish . 13
6.4 Passivation . 14
6.4.1 General. 14
6.4.2 Titanium / Zirconium passivation . 14
6.4.3 Chromium passivation . 14
6.5 Oiling . 15
6.6 Imperfections . 15
6.6.1 Coils . 15
6.6.2 Sheets . 15
7 Coatings . 16
7.1 Electrolytic tinplate . 16
7.1.1 Properties . 16
7.1.2 Test method . 17
7.2 Electrolytic chromium coated steel . 17
7.2.1 General. 17
7.2.2 Test method . 18
8 Mechanical properties . 18
8.1 General. 18
8.2 Tensile test measurement . 19
8.2.1 General. 19
8.2.2 Location of test pieces . 19
8.2.3 Aging . 19
8.2.4 Thickness . 19
8.2.5 Testing conditions . 19
8.2.6 Strength characteristics . 19
8.3 Mechanical properties of tinmill products . 23
9 Tolerances on dimensions and shape . 25
9.1 General. 25
9.2 Thickness and feather edge . 25
2

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oSIST prEN 10202:2021
prEN 10202:2021 (E)
9.2.1 Thickness . 25
9.2.2 Test method for thickness . 25
9.2.3 Feather edge . 25
9.2.4 Test method for feather edge . 25
9.3 Linear dimensions . 26
9.3.1 Width and length . 26
9.3.2 Out-of-squareness of sheets. 26
9.3.3 Short pitch camber (lateral weave) of coils . 27
9.3.4 Test method for short pitch camber . 27
9.4 Shape . 27
9.4.1 Edge wave . 27
9.4.2 Test method for edge wave . 28
9.4.3 Bow . 28
9.4.4 Test method for bow. 28
9.4.5 Centre fullness . 29
9.4.6 Test method for centre fullness. 29
9.4.7 Burr . 30
10 Welds within a coil . 31
10.1 General . 31
10.2 Number of welds . 31
10.3 Location of welds . 31
10.4 Dimensions of welds . 31
10.4.1 Thickness . 31
10.4.2 Overlap . 31
11 Marking of differentially coated cold reduced tinplate . 31
12 Selection of samples . 32
12.1 For quality control. 32
12.2 In case of dispute . 33
13 Retests . 33
14 Dispatch and packaging . 33
14.1 Coils . 33
14.1.1 Coil dispatch . 33
14.1.2 Coil winding . 33
14.2 Sheets . 34
Annex A (informative) De tinning . 35
A.1 Principle . 35
A.2 Clarke’s solution . 35
A.3 Procedure . 35
Annex B (normative) Determination of chromium using the diphenylcarbazide method . 36
B.1 General . 36
B.2 Principle . 36
B.3 Reagent . 36
B.4 Apparatus . 36
B.5 Procedure . 36
B.6 Calibration. 37
3

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oSIST prEN 10202:2021
prEN 10202:2021 (E)
Annex C (normative) Determination of titanium content using the Inductively Coupled
Plasma (ICP) method . 38
C.1 General. 38
C.2 Principle . 38
C.3 Reagent . 38
C.4 Apparatus . 39
C.5 Procedure . 39
Annex D (normative) Determination of tin oxides by galvanostatic potentiometry . 40
D.1 General. 40
D.2 Principle . 40
D.3 Reagents . 40
D.4 Apparatus . 40
D.5 Procedure . 40
Annex E (normative) Electromechanical method for determining tin coating mass . 42
E.1 Principle . 42
E.2 Reagents . 42
E.3 Apparatus . 42
E.3.1 Cell and electrodes . 42
E.3.2 Power supply . 42
E.3.3 Voltmeter . 42
E.4 Procedure . 42
E.5 Calibration of the measuring system . 42
E.6 Calculation . 43
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) . 46
F.1 Determination of chromium in the oxide . 46
F.1.1 Principle . 46
F.1.2 Reagents . 46
F.1.3 Apparatus . 46
F.1.4 Preparation of the chromium calibration curve . 47
F.1.5 Procedure . 47
F.1.6 Calculation . 47
F.2 Determination of metallic chromium . 47
F.2.1 Principle . 47
F.2.2 Reagents . 48
F.2.3 Apparatus . 48
F.2.4 Preparation of the chromium calibration curve . 48
4

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oSIST prEN 10202:2021
prEN 10202:2021 (E)
F.2.5 Procedure . 49
F.2.5.1 General . 49
F.2.5.2 Removal of chromium oxide layer . 49
F.2.5.3 Removal and determination of metallic chromium . 49
F.2.6 Calculation . 49
Annex G (informative) The Rockwell Hardness test for routine determination of proof
strength for double reduced materials . 53
G.1 General . 53
G.2 Test pieces . 53
G.3 Test method . 53
G.4 Hardness for tinmill products . 55
Annex H (informative) The springback test for routine determination of proof strength for
double reduced material. 56
H.1 General . 56
H.2 Principle . 56
H.3 Test pieces . 56
H.4 Test method . 56
Annex I (normative) Tensile testing conditions in case of dispute . 57
I.1 General . 57
I.2 Tensile test piece dimensions . 57
I.3 Elongation measurement. 57
I.4 Testing velocity . 57
I.4.1 General . 57
I.4.2 Material displaying no discontinuous yielding . 57
I.4.3 Discontinuous yielding material . 58
Annex J (informative) Indicative tensile strength of tinmill products . 59
Annex K (informative) Alternative marking system for electrolytic tinplate — differentially
coated . 60
Bibliography . 62
5

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oSIST prEN 10202:2021
prEN 10202:2021 (E)
European foreword
This document (prEN 10202:2021) has been prepared by Technical Committee CEN/TC 459/SC 9
“Coated and uncoated flat products to be used for cold forming”, the secretariat of which is held by
AFNOR.
This document is currently submitted to the CEN Enquiry.
This document will supersede 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.
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oSIST prEN 10202:2021
prEN 10202:2021 (E)
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 refe
...