GB/T 2520-2026 Cold-reduced electrolytic tinplate English, Anglais, Englisch, Inglés, えいご
This is a draft translation for reference among interesting stakeholders. The finalized translation (passing through draft translation, self-check, revision and verification) will be delivered upon being ordered.
ICS
CCS
National Standard of the People's Republic of China
GB/T 2520-2026
Cold-reduced electrolytic tinplate
冷轧电镀锡钢板及钢带
Issue date: 2026-02-27 Implementation date: 2026-09-01
Issued by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
the Standardization Administration of the People's Republic of China
Contents
Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Classification, designation and grade designation method
5 Ordering information
6 Manufacturing process
7 Technical requirements
8 Test methods
9 Inspection rules
10 Packaging, marking and quality certificate
11 Approximate comparison of temper grade designations in relevant domestic and international standards
12 Precautions for use of tinplate
13 Implementation guide for migration test standards for metal materials and products intended for food contact
Annex A (normative) Hardness of single-cold-reduced steel plates and strips after ageing treatment
Annex B (normative) Method for identifying the heavy side of differential coated electrolytic tinplate and strips
Annex C (normative) Test method for oil coating weight on electrolytic tinplate surfaces
Annex D (normative) Conversion table for HR15TSm and HR30TSm
Annex E (normative) Test method for tin coating weight of electrolytic tinplate
Annex F (normative) Test method for chromium content on the surface of electrolytic tinplate
Annex G (normative) Test method for corrosion resistance of electrolytic tinplate
Annex H (normative) Determination of lead content in tinplate coatings
Annex I (normative) Test method for titanium content on the surface of electrolytic tinplate
Annex J (informative) Comparison of temper grade designations in this document with those in relevant standards (or steel grade designations)
Annex K (informative) Precautions for use of tinplate
Annex L (informative) Implementation guide for migration test standards for metal materials and products intended for food contact
Cold-reduced electrolytic tinplate and tin-free steel
1 Scope
This document specifies the classification, designation and grade designation method, ordering information, manufacturing process, technical requirements, test methods, inspection rules, packaging, marking and quality certificate for cold-reduced electrolytic tinplate and tin-free steel.
This document is applicable to the production, inspection and delivery of single-cold-reduced electrolytic tinplate and tin-free steel with a nominal thickness of 0.140 mm to 0.80 mm, and double-cold-reduced electrolytic tinplate and tin-free steel with a nominal thickness of 0.100 mm to 0.390 mm (hereinafter referred to as "plates and strips").
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies.
GB/T 222, Steel and alloy — Determination of permissible tolerances for chemical composition of products
GB/T 223 (all parts), Methods for chemical analysis of iron, steel and alloy
GB/T 228.1-2021, 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
GB/T 247, General requirements for packaging, marking and quality certificate of steel plates and strips
GB/T 708, Cold-rolled steel plates and strips — Dimensions, shapes, weights and tolerances
GB/T 728-2020, Tin ingots
GB/T 4336, Carbon steel and low-alloy steel — Determination of multi-element contents — Spark discharge atomic emission spectrometric method (routine method)
GB/T 6394, Determination of the average grain size of metals
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)
GB/T 20125, Low-alloy steel — Determination of multi-element contents — Inductively coupled plasma atomic emission spectrometric method
GB/T 20126, Non-alloy steel — Determination of low carbon content — Part 2: Infrared absorption method after combustion in an induction furnace (with pre-heating)
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
electrolytic tinplate
Cold-reduced low-carbon steel plate or strip with a tin coating deposited on both surfaces by a continuous electrolytic tinning process.
3.2
differential coated electrolytic tinplate
Electrolytic tinplate with different tin coating weights on the two surfaces.
3.3
single cold-reduced (SR)
The steel substrate is cold-reduced to the required thickness, followed by annealing and temper rolling.
3.4
double cold-reduced (DR)
The steel substrate is single cold-reduced and annealed, and then cold-reduced a second time with a relatively large reduction.
3.5
box annealing (BA)
A process in which cold-rolled steel strip in a tightly wound coil is annealed in a controlled atmosphere according to a specified time and temperature cycle.
3.6
continuous annealing (CA)
A process in which cold-rolled steel strip in an uncoiled state is annealed in a controlled atmosphere according to a specified time and temperature cycle.
3.7
chromium passivation
A conventional passivation process in which tinplate is cathodically treated in an acidic chromate solution to form a chromium layer on the surface of the tinplate.
3.8
chemical passivation (CP)
A passivation treatment in which the steel strip after electrolytic tinning is immersed in a chemical solution without electric current.
3.9
electrochemical passivation (CE)
A passivation treatment in which the steel strip after electrolytic tinning is immersed in a chemical solution and cathodically treated with electric current.
3.10
chromium-free passivation (CFP)
A passivation process in which tinplate is treated by electrolytic or coating methods using chromium-free passivation solutions, resulting in a tinplate surface free of chromium.
4 Classification, designation and grade designation method
4.1 Classification and designation
The classification and designation of plates and strips shall comply with Table 1.
4.2 Grades and designation method
4.2.1 For plates and strips for general purposes, the grade designation generally consists of the steel grade code for the substrate, the temper grade designation and the annealing method code.
Example: MRT-2.5CA, LT-3BA, MRDR-8BA.
4.2.2 For plates and strips used for manufacturing two-piece drawn and wall-ironed (DI) cans, the substrate steel grade is applicable to L or D. The grade designation consists of the substrate steel grade, the temper grade designation, the annealing method code and the code DI.
Example: LT-3BADI, DT-2.5CADI.
4.2.3 For plates and strips used for manufacturing plain food cans (with tin coating weight above 5.6/2.8 g/m²) for acidic contents, i.e. K-plate, the substrate steel grade is generally L. The grade designation generally consists of the substrate steel grade L, the temper grade designation, the annealing method code and the code K.
Example: LT-2.5CAK.
4.2.4 For plates and strips used for manufacturing food cans (CP) requiring chemical passivation treatment, such as for mushrooms, the substrate steel grade is generally MR or L. The grade designation consists of the substrate steel grade MR or L, the temper grade designation, the annealing method code and the code CP.
Example: MRT-2.5CACP, LT-3BACP.
4.2.5 For high-elongation double-cold-reduced plates and strips, i.e. EL plates, the grade designation consists of the substrate steel grade code, the temper grade designation, the annealing method code, the surface treatment method code and the code EL. When the surface treatment method is electrochemical passivation, CE may be omitted.
GB/T 2520-2026 Cold-reduced electrolytic tinplate English, Anglais, Englisch, Inglés, えいご
This is a draft translation for reference among interesting stakeholders. The finalized translation (passing through draft translation, self-check, revision and verification) will be delivered upon being ordered.
ICS
CCS
National Standard of the People's Republic of China
GB/T 2520-2026
Cold-reduced electrolytic tinplate
冷轧电镀锡钢板及钢带
Issue date: 2026-02-27 Implementation date: 2026-09-01
Issued by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
the Standardization Administration of the People's Republic of China
Contents
Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Classification, designation and grade designation method
5 Ordering information
6 Manufacturing process
7 Technical requirements
8 Test methods
9 Inspection rules
10 Packaging, marking and quality certificate
11 Approximate comparison of temper grade designations in relevant domestic and international standards
12 Precautions for use of tinplate
13 Implementation guide for migration test standards for metal materials and products intended for food contact
Annex A (normative) Hardness of single-cold-reduced steel plates and strips after ageing treatment
Annex B (normative) Method for identifying the heavy side of differential coated electrolytic tinplate and strips
Annex C (normative) Test method for oil coating weight on electrolytic tinplate surfaces
Annex D (normative) Conversion table for HR15TSm and HR30TSm
Annex E (normative) Test method for tin coating weight of electrolytic tinplate
Annex F (normative) Test method for chromium content on the surface of electrolytic tinplate
Annex G (normative) Test method for corrosion resistance of electrolytic tinplate
Annex H (normative) Determination of lead content in tinplate coatings
Annex I (normative) Test method for titanium content on the surface of electrolytic tinplate
Annex J (informative) Comparison of temper grade designations in this document with those in relevant standards (or steel grade designations)
Annex K (informative) Precautions for use of tinplate
Annex L (informative) Implementation guide for migration test standards for metal materials and products intended for food contact
Cold-reduced electrolytic tinplate and tin-free steel
1 Scope
This document specifies the classification, designation and grade designation method, ordering information, manufacturing process, technical requirements, test methods, inspection rules, packaging, marking and quality certificate for cold-reduced electrolytic tinplate and tin-free steel.
This document is applicable to the production, inspection and delivery of single-cold-reduced electrolytic tinplate and tin-free steel with a nominal thickness of 0.140 mm to 0.80 mm, and double-cold-reduced electrolytic tinplate and tin-free steel with a nominal thickness of 0.100 mm to 0.390 mm (hereinafter referred to as "plates and strips").
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies.
GB/T 222, Steel and alloy — Determination of permissible tolerances for chemical composition of products
GB/T 223 (all parts), Methods for chemical analysis of iron, steel and alloy
GB/T 228.1-2021, 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
GB/T 247, General requirements for packaging, marking and quality certificate of steel plates and strips
GB/T 708, Cold-rolled steel plates and strips — Dimensions, shapes, weights and tolerances
GB/T 728-2020, Tin ingots
GB/T 4336, Carbon steel and low-alloy steel — Determination of multi-element contents — Spark discharge atomic emission spectrometric method (routine method)
GB/T 6394, Determination of the average grain size of metals
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)
GB/T 20125, Low-alloy steel — Determination of multi-element contents — Inductively coupled plasma atomic emission spectrometric method
GB/T 20126, Non-alloy steel — Determination of low carbon content — Part 2: Infrared absorption method after combustion in an induction furnace (with pre-heating)
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
electrolytic tinplate
Cold-reduced low-carbon steel plate or strip with a tin coating deposited on both surfaces by a continuous electrolytic tinning process.
3.2
differential coated electrolytic tinplate
Electrolytic tinplate with different tin coating weights on the two surfaces.
3.3
single cold-reduced (SR)
The steel substrate is cold-reduced to the required thickness, followed by annealing and temper rolling.
3.4
double cold-reduced (DR)
The steel substrate is single cold-reduced and annealed, and then cold-reduced a second time with a relatively large reduction.
3.5
box annealing (BA)
A process in which cold-rolled steel strip in a tightly wound coil is annealed in a controlled atmosphere according to a specified time and temperature cycle.
3.6
continuous annealing (CA)
A process in which cold-rolled steel strip in an uncoiled state is annealed in a controlled atmosphere according to a specified time and temperature cycle.
3.7
chromium passivation
A conventional passivation process in which tinplate is cathodically treated in an acidic chromate solution to form a chromium layer on the surface of the tinplate.
3.8
chemical passivation (CP)
A passivation treatment in which the steel strip after electrolytic tinning is immersed in a chemical solution without electric current.
3.9
electrochemical passivation (CE)
A passivation treatment in which the steel strip after electrolytic tinning is immersed in a chemical solution and cathodically treated with electric current.
3.10
chromium-free passivation (CFP)
A passivation process in which tinplate is treated by electrolytic or coating methods using chromium-free passivation solutions, resulting in a tinplate surface free of chromium.
4 Classification, designation and grade designation method
4.1 Classification and designation
The classification and designation of plates and strips shall comply with Table 1.
4.2 Grades and designation method
4.2.1 For plates and strips for general purposes, the grade designation generally consists of the steel grade code for the substrate, the temper grade designation and the annealing method code.
Example: MRT-2.5CA, LT-3BA, MRDR-8BA.
4.2.2 For plates and strips used for manufacturing two-piece drawn and wall-ironed (DI) cans, the substrate steel grade is applicable to L or D. The grade designation consists of the substrate steel grade, the temper grade designation, the annealing method code and the code DI.
Example: LT-3BADI, DT-2.5CADI.
4.2.3 For plates and strips used for manufacturing plain food cans (with tin coating weight above 5.6/2.8 g/m²) for acidic contents, i.e. K-plate, the substrate steel grade is generally L. The grade designation generally consists of the substrate steel grade L, the temper grade designation, the annealing method code and the code K.
Example: LT-2.5CAK.
4.2.4 For plates and strips used for manufacturing food cans (CP) requiring chemical passivation treatment, such as for mushrooms, the substrate steel grade is generally MR or L. The grade designation consists of the substrate steel grade MR or L, the temper grade designation, the annealing method code and the code CP.
Example: MRT-2.5CACP, LT-3BACP.
4.2.5 For high-elongation double-cold-reduced plates and strips, i.e. EL plates, the grade designation consists of the substrate steel grade code, the temper grade designation, the annealing method code, the surface treatment method code and the code EL. When the surface treatment method is electrochemical passivation, CE may be omitted.
