GB/T 2520-2017_English: PDF (GB/T2520-2017)
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| Standard ID | GB/T 2520-2017 (GB/T2520-2017) | | Description (Translated English) | Cold-reduced electrolytic tinplate [Steel-plate and steel-strip] | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | H46 | | Word Count Estimation | 26,232 | | Date of Issue | 2017-09-07 | | Date of Implementation | 2018-06-01 | | Older Standard (superseded by this standard) | GB/T 2520-2008 | | Administrative Organization | National Steel Standardization Technical Committee (SAC/TC 183) | | Standard ID | GB/T 2520-2008 (GB/T2520-2008) | | Description (Translated English) | Cold-reduced electrolytic tinplate | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | H46 | | Classification of International Standard | 77.140.50 | | Word Count Estimation | 16,185 | | Date of Issue | 2008-09-11 | | Date of Implementation | 2009-05-01 | | Older Standard (superseded by this standard) | GB/T 2520-2000 | | Adopted Standard | JIS G3303-2008, NEQ; ASTM A623M-2006a, NEQ; ASTM A624M-2003, NEQ; ASTM A625M-2003, NEQ; ASTM A626M-2003, NEQ; ASTM A650M-2003, NEQ; ISO 11949-1995, NEQ; EN 10202-2001, NEQ | | Drafting Organization | Baoshan Iron & Steel Co., Ltd. | | Administrative Organization | National Steel Standardization Technical Committee | | Regulation (derived from) | National Standard Approval Announcement 2008 No.16 (Total No.129) | | Proposing organization | China Iron and Steel Association | | Issuing agency(ies) | Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China; Standardization Administration of China | | Summary | This standard specifies the tin- plated cold-rolled steel sheet and strip classification and code, dimensions, shape, Weight, technical requirements, marking and quality certification, etc., packaging, inspection and testing. This standard applies to nominal thickness of 0. 15mm ~ 0. 60mm tin plating of a cold-rolled steel sheet and strip and the nominal thickness of 0. 12mm ~ 0. 36mm tin plating secondary cold-rolled steel sheet and strip (hereinafter referred to as steel sheet and strip). | | Standard ID | GB/T 2520-2000 (GB/T2520-2000) | | Description (Translated English) | Cold-reduced electrolytic tinplate | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | H46 | | Classification of International Standard | 77.140.50 | | Word Count Estimation | 17,157 | | Date of Issue | 2000/10/25 | | Date of Implementation | 2001/9/1 | | Older Standard (superseded by this standard) | GB/T 2520-1988 | | Adopted Standard | ISO 11949-1995, MOD | | Regulation (derived from) | Announcement of Newly Approved National Standards No. 16 of 2008 (No. 129 overall) | | Proposing organization | State Bureau of Metallurgical Industry | | Issuing agency(ies) | State Quality and Technical Supervision |
GB/T 2520-2017
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.140.50
H 46
Cold-reduced Electrolytic Tinplate
ISSUED ON. SEPTEMBER 7, 2017
IMPLEMENTED ON. JUNE 1, 2018
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine of the People's Republic of China;
Standardization Administration of the People's Republic of
China.
3. No action is required - Full-copy of this standard will be automatically &
immediately delivered to your EMAIL address in 0~60 minutes.
Table of Contents
Foreword ... 3
1 Application Scope ... 5
2 Normative References ... 5
3 Terms and Definitions ... 7
4 Classification and Codes ... 9
5 Ordering Content ... 10
6 Dimensions, Shapes, Weights and Tolerances ... 10
7 Technical Requirements ... 13
8 Test Methods ... 18
9 Inspection Rules ... 20
10 Packaging, Marking and Quality Certification ... 20
11 Cross-reference of temper degree codes of domestic and overseas
standards ... 20
12 Precautions for use of tinplate ... 21
Annex A (Normative) Method for Marking of Thick Face of Differentially Coated
Electrolytic Tinplate ... 22
Annex B (Informative) Spring-back Test Method ... 23
Annex C (Normative) Table of Conversion between HR15Tm and HR30Tm . 25
Annex D (Informative) Cross-reference of Temper Degree Codes of Domestic
and Overseas Standards ... 26
Annex E (Informative) Precautions for Use of Tinplate ... 27
Annex F (Normative) Determination of Lead Content in the Coating of Tinplate
... 28
Foreword
This Standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This Standard replaces GB/T 2520-2008, Cold-reduced Electrolytic Tinplate.
Compared with GB/T 2520-2008, the major technical changes are as follows.
-- the thickness of single cold-reduced products in the application scope is modified
into 0.14 mm ~ 0.80 mm (see Chapter 1; Chapter 1 of Edition 2008);
-- the classification method is modified, the passivation method is modified into the
surface treatment method and the method of no treatment is added (see Table 1;
Table 1 of Edition 2008);
-- the definition of “chemical treated electrolytic tinplate” is deleted (see 3.7 of
Edition 2008);
-- the solutions for chemical passivation and electrochemical passivation intrusion
are modified (see 3.7 and 3.8; 3.8 and 3.9 of Edition 2008);
-- the content “Other thickness increments of advancement may also be used for
the nominal thickness as agreed on by the supplier and the purchaser” (see 6.1.1);
-- the types and chemical compositions of black plate steels of cold-reduced
electrolytic tinplate are added; the method standards for the testing of chemical
compositions are added simultaneously in the normative references (see Article 2
and Table 2);
-- the requirements for the black plates, and the limits of poisonous or harmful
elements, of tin coating of the tinplate which is used to make containers
(containing or not containing organic coating) in direct contact with foods,
pharmaceuticals, beverages and so on, are added (7.1.3 and 7.3.5);
-- the provisions on the minimum average tin coating weight when an order is placed
in accordance with the tin coating weight not specified, are added (7.3.1);
-- the requirement “the rounding interval of the value of single point test on each
surface is 0.05 g/m2” (see 7.3.3);
-- the surface condition of double cold-reduced products, S, is added (see Table 8);
-- the provision that the equipment measuring hardness shall be provided with a
diamond anvil block, is added (see 8.5);
-- Annex B “Spring-back Test Method” is modified (see Annex B; Annex B of Edition
2008);
-- Annex E “Precautions for Use of Tinplate” is added;
Cold-reduced Electrolytic Tinplate
1 Application Scope
This Standard specifies the classification and codes, ordering content, dimensions,
shapes, weights and tolerances, technical requirements, test methods, inspection
rules, packaging, marking and quality certification of cold-reduced electrolytic tinplate.
This Standard applies to single cold-reduced electrolytic tinplate of nominal thickness
0.14 mm ~ 0.80 mm and double cold-reduced electrolytic tinplate of nominal thickness
0.12 mm ~ 0.36 mm (hereinafter referred to as tinplate).
2 Normative References
The following referenced documents are indispensable for the application of this
document. For dated references, only the edition dated applies to this document. For
undated references, the latest edition of the referenced documents (including all
amendments) applies to this Standard.
GB/T 222, Permissible Tolerances for Chemical Composition of Steel Products
GB/T 223.4, Iron, Steel and Alloy – Determination of Manganese Content –
Potentiometric or Visual Titration Method
GB/T 223.5, Steel and Iron – Determination of Acid-soluble Silicon and Total Silicon
Content – Reduced Molybdosilicate Spectrophotometric Method
GB/T 223.9, Iron, Steel and Alloy – Determination of Aluminium Content – Chrom
Azurol S Photometric Method
GB/T 223.11, Iron, Steel and Alloy – Determination of Chromium Content – Visual
Titration or Potentiometric Titration Method
GB/T 223.18, Methods for Chemical Analysis of Iron, Steel and Alloy – The Sodium
Thiosulfate Separation Iodimetric Method for the Determination of Copper Content
GB/T 223.23, Iron, Steel and Alloy – Determination of Nickel Content – The
Dimethylglyoxime Spectrophotometric Method
GB/T 223.26, Iron, Steel and Alloy – Determination of Molybdenum Content – The
Thiocyanate Spectrophotometric Method
GB/T 223.29, Iron Steel and Alloy – Determination of Lead Content – Carrier
Precipitation-Xylenol Orange Spectrophotometric Method
GB/T 223.31, Iron Steel and Alloy – Determination of Arsenic Content – Distillation-
Molybdenum Blue Spectrophotometric Method
GB/T 223.57, Methods for Chemical Analysis of Iron,Steel And Alloy – The
Extraction-Absorption Catalytic Polarographic Method for the Determination of
Cadmium Content
GB/T 223.59, Iron, Steel and Alloy – Determination of Phosphorus Content –
Bismuth Phosphomolybdate Blue Spectrophotometric Method and Antimony
Phosphomolybdate Blue Spectrophotometric Method
GB/T 223.60, Methods for Chemical Analysis of Iron, Steel and Alloy – The
Perchloric Acid Dehydration Gravimetric Method for the Determination of Silicon
Content
GB/T 223.63, Methods for Chemical Analysis of Iron, Steel and Alloy – The Sodium
(Potassium) Periodate Photometric Method for the Determination of Manganese
Content
GB/T 223.64, Iron, Steel and Alloy – Determination of Manganese Content – Flame
Atomic Absorption Spectrometric Method
GB/T 228.1, Metallic Materials – Tensile Testing – Part 1. Method of Test at Room
Temperature
GB/T 230.1, Metallic Materials – Rockwell Hardness Test – Part 1. Test Method
(Scales A, B, C, D, E, F, G, H, K, N, T)
GB/T 247, General Rule of Package, Mark and Certification for Steel Plates (Sheets)
and Strips
GB/T 708, Dimension, Shape, Weight, and Tolerance for Cold-Rolled Steel Plate
GB/T 728-2010, Ingot Tin
GB/T 1838, Test Methods of Tin Coating Mass for Electrolytic Tinplate
GB/T 4336, Carbon and Low-alloy Steel – Determination of Multi-element Contents
– Spark Discharge Atomic Emission Spectrometric Method (Routine Method)
GB/T 8170, Rules of Rounding off for Numerical Values and Expression and
Judgement of Limiting Values
GB/T 17505, Steel and Steel Products – General Technical Delivery Requirements
GB/T 20066, Steel and Iron – Sampling and Preparation of Samples for the
Determination of Chemical Composition
GB/T 20123, Steel and Iron – Determination of Total Carbon and Sulfur Content
Infrared Absorption Method after Combustion in an Induction Furnace (Routine
Method)
continuous annealing; CA
The process in which cold-reduced steel strip is annealed in the unfolding state and
controlled atmosphere, in accordance with the set cycles of time and temperature.
3.7
chemical passivation
Steel strip is immersed in a chemical solution after electrolytic tinning and treated by
chemical passivation without electrifying.
3.8
electrochemical passivation
Steel strip is immersed in a chemical solution after electrolytic tinning and treated by
cathodic electrochemical passivation by electrifying.
3.9
low chromate passivation
One type of chemical passivation treatment, including the target value of the chrom...
......
GB/T 2520-2008
GB
NATIONAL STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
ICS 77.140.75
H 46
Replacing GB/T 2520-2000
Cold-reduced electrolytic tinplate
ISSUED ON. SEPTEMBER 11, 2008
IMPLEMENTED ON. MAY 01, 2009
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine of the People's Republic of China;
Standardization Administration of the People's Republic of
China;
Table of contents
Foreword ... 3
1 Scope ... 5
2 Normative references ... 5
3 Terms and definitions ... 6
4 Classification and code ... 8
5 Ordering information required ... 9
6 Size, shape, weight and allowable deviation ... 10
7 Technical requirements ... 12
8 Inspection and test ... 17
9 Packaging, marking and quality certificate ... 19
10 Numerical rounding off rules ... 19
11 Approximate comparison of domestic and foreign related standard
tempering degree codes ... 19
Appendix A (Normative) Thick side identification method of differentially coated
tinplate ... 20
Appendix B (Informative) Rebound test method of double cold-reduced plate
... 21
Appendix C (Normative) HR15T and HR30Tm conversion table ... 23
Appendix D (Informative) Comparison between the tempering degree code (or
steel grade code) of this standard and that of relevant standard ... 24
Foreword
This standard is the revision of GB/T 2520-2000 “Cold-reduced electrolytic
tinplate” with reference to JIS G3303.2008 “Tinplate and blackplate” (Japanese
version), ASTM A623M-06a “Standard specification for tin mill products,
General requirements” (English version), ASTM A624M-03 “Standard
specification for tin mill products, electrolytic tin plate, single reduced” (English
version), ASTM A625M-03 “Standard specification for tin mill products, black
plate, single reduced” (English version), ASTM A626M-03 “Standard
specification for tin mill products, electrolytic tin plate, double reduced” (English
version), ASTM A650M-03 “Standard specification for tin mill products, black
plate, double reduced” (English version), ISO 11949.1995 “Cold reduced
electrolytic tinplate” (English version), and EN10202.2001 “Cold reduced tinmill
products - Electrolytic tinplate and electrolytic chromium/chromium oxide
coated steel” (English version).
This standard replaces GB/T 2520-2000.
As compared with GB/T 2520-2000, the main changes of this standard are as
follows.
- CHANGE the standard Chinese name;
- MODIFY the contents of terms and definitions;
- MODIFY the tinplating amount code expression method;
- ADD the code of straight side plate and lace plate;
- USE the tempering degree to replace the original steel level expression;
- CANCEL the requirements for the level I and level I from surface quality;
- ADD the designation expression example;
- ADD the information required for ordering;
- MODIFY the requirements for size and allowable dimensional deviation;
- MODIFY the deviation range and rounding off requirements of the
minimum mean tinplating amount;
- MODIFY the identification method of differentially coated electrolytic
tinplate;
Cold-reduced electrolytic tinplate
1 Scope
This standard specifies the classification and code, size, shape, weight,
technical requirements, inspection and test, packaging, marking and quality
certificates of cold-reduced electrolytic tinplate.
This standard applies to the single cold-reduced electrolytic tinplate with a
nominal thickness of 0.15 mm ~ 0.60 mm AND the double cold-reduced
electrolytic tinplate with a nominal thickness of 0.12 mm ~ 0.36 mm
(hereinafter referred to as steel plate and steel strip).
2 Normative references
The provisions in following documents become the provisions of this Standard
through reference in this Standard. For the dated references, the subsequent
amendments (excluding corrections) or revisions do not apply to this Standard;
however, parties who reach an agreement based on this Standard are
encouraged to study if the latest versions of these documents are applicable.
For undated references, the latest edition of the referenced document applies.
GB/T 228 Metallic materials - Tensile testing at ambient temperature (GB/T
228-2002, eqv ISO 6892.1998)
GB/T 230.1 Metallic Rockwell hardness test - Part 1. Test methods (scales A,
B, C, D, E, F, G, H, K, N, T) (GB/T 230.1-2004, ISO 65081.1999, MOD)
GB/T 247 General rule of package mark and certification for steel plates
(sheets) and strips
GB/T 708 Dimension, shape, weight, and tolerance for cold-rolled steel
plate
GB/T 728-1998 Ingot tin
GB/T 1838 Test methods of tin coating mass for electrolytic tinplate
GB/T 8170 Rules for rounding off for numerical values & expression and
judgment of limiting values
Continuous annealing (CA)
It refers to the annealing process of the cold reduced steel strip in unfolding
state in the controlled atmosphere at a set time and temperature cycle.
3.7
Chemical treated electrolytic tinplate
It refers to the corresponding chemical passivation treatment conducted on
the surface of the electrolytic tinplate to make the surface characteristics of
the electrolytic tinplate comply with the final intended use as specified.
3.8
Chemical chromate treated
It refers to the chemical passivation treatment of the electrolytic tinplate
which is immersed in the dichromate solution without being energized.
3.9
Electrolytic chromate treated
It refers to the cathodic electrochemical passivation treatment of the
electrolytic tinplate which is immersed in the dichromate solution being
energized.
3.10
Low chromate treated
It refers to one of the chemical passivation treatments, wherein the target
value of the chromium content in the surface passivation film shall be
controlled below 1.5 mg/m2.
3.11
K plate
As for some of food with strong electrochemical detinning effect, it shall use
the tinplate of good corrosion resistance, with the tinplating amount not less
than 5.6/2.8 g/m2; AND after being subjected to the four special tests
including acid lag (PL), iron solution value (ISV), tin crystal size (TCS), and
alloy-tin electric coupling (ATC), the target value shall comply with the
following requirements.
the actual thickness as measured at the middle position along the width
direction of the steel plate and steel strip shall be not more than 8.0% of the
actual thickness as measured at the middle position.
6.2.3 Allowable width deviation
The allowable width deviation of steel plate and strip is 0 mm ~ +3 mm.
6.2.4 Allowable length deviation
The allowable length deviation of the steel plate is 0 mm ~ + 3 mm.
6.3 Shape
6.3.1 The degree of disengagement shall not be greater than 0.15% of the
width of the steel plate.
6.3.2 For every 1000 mm length, the camber shall not be more than 1 mm.
6.3.3 Roughness is only applicable to steel plates. The roughness along any
1000 mm length of the steel plate shall not be more than 3 mm.
6.4 The edge shape and size as well as the allowable dimensional deviation of
the lace side plate shall be as negotiated between the supplier and the
purchaser at the time of ordering.
6.5 Other size, shape, weight and allowable deviation shall comply with the
provisions of GB/T 708.
6.6 Welds in steel strip
6.6.1 In each steel strip, the total number of welds at any length of 10000 m
shall not be greater than 3.
6.6.2 Welds in steel strip shall be marked through punching plus visible mark,
for example, by inserting a soft label at the weld location. Through negotiation
between the supplier and the purchaser, it may also use other marking
method.
6.6.3 The thickness of the weld shall not be greater than 1.5 times the nominal
thickness of the strip.
6.6.4 The total length of the weld lap (a) shall not be more than 10 mm AND
the free lap length (b) shall not be greater than 5 mm, as shown in Figure 1.
Appendix B
(Informative)
Rebound test method of double cold-reduced plate
B.1 Principles
First MEASURE the thickness of the rectangular test; and then BEND around
the cylindrical mandrel for 180°; RELEASE it and MEASURE the rebound
angle, which provides a simple and convenient method for the assessment of
the yield strength of the double cold-reduced plate.
B.2 Samples
From each sample steel plate of the double cold-reduced tinplate, TAKE two
200 mm × 25 mm samples from the edge and middle part, with the distance
from the edge sample to the steel plate edge of not less than 25 mm. Before
the test, MAKE the sample subjected to artificial aging for 20 min at 200 °C.
B.3 Test
B.3.1 Test instrument
Rebound tester.
B.3.2 Test procedure
B 3.2.1 MEASURE the thickness of the sample, accurate to 0.001 mm...
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