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GB/T 13790: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB/T 13790-2025 | English | 290 |
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Cold rolled low carbon steel sheet and strip for vitreous enamelling
| Valid |
| GB/T 13790-2008 | English | 209 |
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Cold rolled low carbon steel sheets and strips for vitreous enamelling
| Valid |
| GB/T 13790-1992 | English | 239 |
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Cold rolled sheets and strips for civil enameling
| Obsolete |
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GB/T 13790-2025: Cold rolled low carbon steel sheet and strip for vitreous enamelling---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT13790-2025
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.140.50
CCS H 46
Replacing GB/T 13790-2008, GB/T 29515-2013
Cold Rolled Low Carbon Steel Sheet and Strip for Vitreous
Enamelling
Issued on: AUGUST 1, 2025
Implemented on: FEBRUARY 1, 2026
Issued by. State Administration for Market Regulation;
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 Designation Representation Method... 7
5 Ordering Content... 8
6 Manufacturing Process... 9
7 Technical Requirements... 9
8 Test Methods... 13
9 Inspection Rules... 14
10 Packaging, Marking and Quality Certificate... 14
Appendix A (informative) A Comparison of Similar Designations with Domestic and
International Standards... 15
Appendix B (normative) Hydrogen Permeation Test... 16
Bibliography... 26
Foreword
This document was drafted in accordance with the rules provided in GB/T 1.1-2020 Directives
for Standardization - Part 1.Rules for the Structure and Drafting of Standardizing Documents.
This document serves as a replacement for GB/T 13790-2008 Cold Rolled Low Carbon Steel
Sheets and Strips for Vitreous Enamelling and GB/T 29515-2013 Cold Rolled Steel Sheet for
Enamelling - Fish-scaling Sensitivity Test - Hydrogen Permeation Method. In comparison with
GB/T 13790-2008, apart from structural adjustments and editorial modifications, the main
technical changes are as follows.
a) The thickness range is modified (see Chapter 1; Chapter 1 of Version 2008);
b) Terms and definitions are added (see Chapter 3);
c) Drawing grades 04, 06 and 07 are added (see Table 1);
d) Ultra-high-grade surface FD is added (see Table 2);
e) Classification and codes based on edge state are added (see Table 4);
f) Enamel processing type ED is added to the designation representation method (see
4.2);
g) Six designations - DC04EK, DC06EK, DC07EK, DC03ED, DC04ED and DC06ED,
as well as their corresponding technical requirements are added (see Table 5, Table 6
and Table 7);
h) The C, Mn, Als and Ti provisions for some designations are modified (see Table 5;
Table 4 of Version 2008);
i) The provisions for the mechanical properties of DC01EK, DC03EK and DC05EK are
modified (see Table 6; Table 5 of Version 2008);
j) The provisions for a 6-month guarantee period for mechanical properties are added
(see 7.2);
k) The provisions for tensile strain marks are modified (see Table 7; Table 6 of Version
2008);
l) A hydrogen permeation test is added (see 7.4.1);
m) A statement is added allowing users to request an enamel adhesion test (see 7.4.2);
n) Ultra-high-grade surface, as well as its code and characteristics are added (see Table
8);
Cold Rolled Low Carbon Steel Sheet and Strip for Vitreous
Enamelling
1 Scope
This document specifies the classification and designation representation method, ordering
content, manufacturing process, technical requirements, test methods, inspection rules,
packaging, marking and quality certificate for cold rolled low carbon steel sheet and strip for
vitreous enameling.
This document applies to cold rolled low carbon steel sheet and strip with a thickness of 0.30
mm ~ 3.50 mm and a width of not less than 600 mm used in the daily-use or industrial vitreous
enameling industry (hereinafter referred to as the “sheet and strip”).
2 Normative References
The contents of the following documents constitute indispensable clauses of this document
through the normative references in the text. In terms of references with a specified date, only
versions with a specified date are applicable to this document. In terms of references without a
specified date, the latest version (including all the modifications) is applicable to this document.
GB/T 222 Permissible Tolerances for Chemical Composition of Steel Products
GB/T 223.9 Iron, Steel and Alloy - Determination of Aluminum Content - Chrome Azurol S
Photometric Method
GB/T 223.17 Methods for Chemical Analysis of Iron, Steel and Alloy - The Diantipyrylmethane
Photometric Method for the Determination of Titanium Content
GB/T 223.40 Iron, Steel and Alloy - Determination of Niobium Content by the
Sulphochlorophenol S Spectrophotometric Method
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 223.63 Iron, Steel and Alloy - Determination of Manganese Content - Sodium (potassium)
Periodate Spectrophotometric Method
GB/T 223.64 Iron, Steel and Alloy - Determination of Manganese Content - Flame Atomic
Absorption Spectrometric Method
GB/T 223.85 Steel and Iron - Determination of Sulfur Content - Infrared Absorption Method
after Combustion in an Induction Furnace
GB/T 228.1-2021 Metallic Materials - Tensile Testing - Part 1.Method of Test at Room
Temperature
GB/T 247 General Rule of Acceptance, Package, Mark and Certification for Steel Plates (sheets)
and Strips
GB/T 708 Dimension, Shape, Weight and Tolerance for Cold-rolled Steel Strip and Sheet
GB/T 2523 Measuring Method of Surface Roughness, Peak Count and Waviness for Cold-
rolled Metal Sheet and Strip
GB/T 2975 Steel and Steel Products - Location and Preparation of Samples and Test Pieces for
Mechanical Testing
GB/T 4336 Carbon and Low-alloy Steel - Determination of Multi-element Contents - Spark
Discharge Atomic Emission Spectrometric Method (routine method)
GB/T 5027 Metallic Materials - Sheet and Strip - Determination of Plastic Strain Ratio
GB/T 8170 Rules of Rounding off for Numerical Values & Expression and Judgement of
Limiting Values
GB/T 17505 Steel and Steel Products - General Technical Delivery Requirements
GB/T 18253-2018 Steel and Steel Products - Types of Inspection Documents
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 Unalloyed Steel - Determination of Low Carbon Content - Part 2.Infrared
Absorption Method after Combustion in an Induction Furnace (with preheating)
3 Terms and Definitions
The following terms and definitions are applicable to this document.
3.1 hydrogen permeation test
A test method that evaluates the fish scaling resistance of steel sheet for vitreous enameling by
generating atomic hydrogen on one side of the cold rolled steel sheet, allowing it to permeate
through the steel sheet to the other side and precipitate as hydrogen gas, and through the time
required for the hydrogen gas to stabilize.
4 Classification and Designation Representation Method
4.1 Classification
4.1.1 The classification and codes of steel sheet and strip by drawing grades are as specified in
Table 1.
Table 1 -- Classification and Codes by Drawing Grades
Drawing Grades Codes
For general purposes 01
For drawing 03
For deep drawing 04
For extra deep drawing 05
For super deep drawing 06
For ultra deep drawing 07
4.1.2 The classification and codes of steel sheet and strip by surface quality level are as specified
in Table 2.
Table 2 -- Classification and Codes by Surface Quality
Surface Quality Level Codes
Relatively advanced surface FB
Advanced surface FC
Super advanced surface FD
4.1.3 The classification and codes of steel sheet and strip by surface texture are as specified in
Table 3.
4.1.4 The classification and codes of steel sheet and strip by edge state are as specified in Table
4.
4.2 Designation Representation Method
The designation of steel sheet and strip consists of four parts. the first part is the letter “D”,
representing cold-formed steel sheet and strip; the second part is the letter “C”, representing
that the rolling condition is cold-rolled; the third part is a two-digit serial number, representing
the drawing grade code, i.e., 01, 03, 04, 05, 06, 07; the fourth part is the enamel processing type
code, with the letters “EK” indicating suitability for conventional enameling processes, and the
letters “ED” indicating suitability for direct one-time enameling processes and enameling
processes with special requirements for anti-dent properties, as well as conventional enameling
processes.
EXAMPLE 1.DC01EK
DC---“D” represents cold-formed steel sheet and strip, and “C” represents that the rolling condition
is cold-rolled;
01---represents drawing grade code 01;
EK---indicates suitability for conventional enameling processes.
EXAMPLE 2.DC04ED
DC---“D” represents cold-formed steel sheet and strip, and “C” represents that the rolling condition
is cold-rolled;
04---represents drawing grade code 04;
ED---indicates suitability for direct one-time enameling processes and enameling processes with
special requirements for anti-dent properties, as well as conventional enameling processes.
5 Ordering Content
5.1 Contracts or orders placed in accordance with this document shall include at least the
following contents.
a) Serial number of this document;
b) Product name (steel sheet or strip);
c) Designation;
d) Specifications and dimensions, unevenness accuracy;
e) Edge state;
f) Surface quality level;
g) Surface texture;
h) Packaging mode;
i) Weight;
j) Purposes;
k) Other special requirements.
5.2 If the ordering contract does not specify dimensions, unevenness accuracy, surface quality
level, surface texture, edge state, and packaging information, etc., then, the products shall be
supplied as trimmed steel sheet or strip with ordinary dimensions and unevenness accuracy,
relatively advanced surface, and a pitted surface, and packaged in accordance with the
packaging mode provided by the supply-side.
6 Manufacturing Process
6.1 Steel should be smelted in an oxygen converter or electric arc furnace. Unless otherwise
specified, the smelting method shall be selected by the supply-side.
6.2 Steel sheet and strip shall be delivered in an annealed, flat state.
7 Technical Requirements
7.1 Designations and Chemical Composition
7.1.1 The designations and chemical composition (smelting analysis) of steel shall conform to
the provisions of Table 5.For a comparison of similar designations with domestic and
international standards, please refer to Appendix A.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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