GB/T 2520-2017 (GB/T2520-2017, GBT 2520-2017, GBT2520-2017)
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Cold-reduced electrolytic tinplate [Steel-plate and steel-strip]
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GB/T 2520-2017
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Standards related to: GB/T 2520-2017
| 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Count Estimation | 26,232 | | Date of Issue | 2017-09-07 | | Date of Implementation | 2018-06-01 | | Older Standard (superseded by this standard) | GB/T 2520-2008 | | Administrative Organization | National Steel Standardization Technical Committee (SAC/TC 183) | GB/T 2520-2017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.
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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...
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