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GB/T 5213-2008 (GB/T5213-2008)

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GB/T 5213-2008English85 Add to Cart 0-9 seconds. Auto-delivery. [Replaced by GB/T 5213-2019] Cold rolled low carbon steel sheet and strip Obsolete


Standards related to: GB/T 5213-2008

GB/T 5213-2008: PDF in English (GBT 5213-2008)

GB/T 5213-2008
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.140.50
H 46
Replacing GB/T 5213-2001
Cold Rolled Low Carbon
Steel Sheet and Strip
ISSUED ON. OCTOBER 10, 2008
IMPLEMENTED ON. MAY 1, 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 Classification and Codification ... 7 
4 Ordering Information ... 8 
5 Dimensions, Shape, Weight and Permissible Deviation ... 8 
6 Technical Requirements ... 8 
7 Inspection and Test ... 11 
8 Packaging, Marking and Quality Certificate ... 12 
9 Numerical Rounding ... 12 
10 Cross Reference between Domestic and Foreign Designations ... 12 
Appendix A (Informative) Chemical Composition of Steels ... 13 
Appendix B (Informative) Cross Reference between Domestic and Foreign
Designations ... 14 
Foreword
Based on the domestic production and use condition of cold rolled low carbon steel
sheet and strip, and by reference to the EN 10130.2006 "Cold Rolled Low Carbon Flat
Steel for Cold Forming - Technical Delivery Conditions" (English edition), this
Standard revised GB/T 5213-2001 "Cold Rolled Sheets and Strips for Deep Drawing".
This Standard replaces GB/T 5213-2001 "Cold Rolled Sheets and Strips for Deep
Drawing".
Compared with GB/T 5213-2001, the following main technical contents were revised.
- Revise the standard name as "Cold Rolled Low Carbon Steel Sheet and Strip";
- Modify the designation naming method;
- Add steel grades DC01 and DC03, for general use and drawing; and add the steel
grade DC07 for super extra-drawing (SEDDQ);
- Modify the surface quality class from two to three;
- For dimension, shape, weight and permissible deviation, it directly adopts GB/T
708;
- Adjust the requirements of chemical composition;
- Delete the provision that SC1 is divided into three classes - F, HF and ZF
according to drawing class; and delete the provision cupping, bending and
metallography;
- Add the requirements for surface structure roughness Ra;
- For products delivered as steel strips, the defective parts on their surface are
changed from 8% to 6% of the length.
Appendixes A and B of this Standard are informative.
This Standard was proposed by China Iron & Steel Association.
This Standard shall be under the jurisdiction of China Steel Standardization Technical
Committee.
Responsible drafting organization of this Standard. Baoshan Iron & Steel Co., Ltd.
Participating drafting organizations of this Standard. Angang Steel Company Limited,
Maanshan Iron & Steel Co., Ltd. AND China Metallurgical Information and
Standardization Institute.
Cold Rolled Low Carbon Steel Sheet and Strip
1 Scope
This Standard specifies the classification and codification, dimension, shape, weight,
technical requirements, inspection and test, packaging, marking and quality certificate,
etc. for cold rolled low carbon steel sheet and strip (hereinafter referred to as "steel
sheets and strips").
This Standard is applicable to cold rolled low carbon steel sheets and strips which are
0.30mm~3.5mm in thickness and used in automobile, household appliance and other
industries.
2 Normative References
The following documents contain the provisions which, through reference in this text,
constitute the provisions of this Standard. For dated reference, the subsequent
amendments (excluding corrigendum) or revisions of these publications do not apply.
However, parties who enter into agreement based on this Standard are encouraged to
investigate the possibility of applying the most recent editions of the standards
indicated below. For any undated references, the latest edition of the document
referred to applies.
GB/T 223.9 Iron Steel and Alloy - Determination of Aluminium Content - Chrom
Azurol S Photometric Method
GB/T 223.16 Methods for Chemical Analysis of Iron, Steel and Alloy - The
Chromotropic Acid Photometric Method for the Determination of Titanium Content
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 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 Methods for Chemical Analysis of Iron, Steel and Alloy - The Flame
Atomic Absorption Spectrometric Method for the Determination of Manganese
Content
GB/T 228 Metallic Materials - Tensile Testing at Ambient Temperature (GB/T
228-2002, eqv ISO 6892.1998)
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 Plates
and Sheets
GB/T 2523 Cold Rolled Sheet (Strip) - Measuring Method for Surface Roughness
GB/T 2975 Steel and Steel Products - Location and Preparation of Test Pieces for
Mechanical Testing (GB/T 2975-1998, eqv ISO 377.1997)
GB/T 4336 Standard Test Method for Spark Discharge Atomic Emission
Spectrometric Analysis of Carbon and Low-alloy Steel (Routine Method)
GB/T 5027 Metallic Materials - Sheet and Strip - Determination of Plastic Strain
Ratio (r-values) (GB/T 5027-2007, ISO 10113.2006, IDT)
GB/T 5028 Metallic Materials - Sheet and Strip - Determination of Tensile Strain
Hardening Exponent (n-values) (GB/T 5028-1999, eqv ISO 10275.1993)
GB/T 8170 Rules for Rounding-off of Numerical Values
GB/T 17505 Steel and Steel Products. General Technical Delivery Requirements
(GB/T 17505-1998, eqv ISO 404.1992)
GB/T 20066 Steel and Iron - Sampling and Preparation of Samples for the
Determination of Chemical Composition (GB/T 20066-2006, ISO 14284.1996, IDT)
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 20123-2006, ISO 15350.2000 ,IDT)
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)
4 Ordering Information
4.1 For ordering, the user shall provide the following information.
a) product name (steel sheet or strip);
b) standard number of the product;
c) designation;
d) specification, dimension and roughness precision;
e) surface quality class;
f) surface structure;
g) edge condition;
h) manner of packaging;
i) weight;
j) purpose;
k) other special requirements (for example, surface is facing up).
4.2 If information, e.g. dimension and roughness precision, surface quality class,
surface structure type, edge condition and packaging, is not specified in the order
contract, the products of this Standard shall be supplied as trimmed steel sheets/strips
in common size and roughness precision, fairly high class and pitted surface structure,
and shall be packed in the manner given by the supplier.
5 Dimensions, Shape, Weight and Permissible Deviation
The dimensions, shape, weight and permissible deviation of steel sheets and strips
shall comply with GB/T 708.
6 Technical Requirements
6.1 Chemical composition
See Appendix A for the chemical composition’s (smelting analysis) references of
steels. If the purchaser has any requirement for chemical composition, it shall be
agreed in order.
6.2 Smelting method and manufacturing process
layering.
6.6.2 The surface quality classes and features of steel sheets and strips are shown
in Table 6.
6.6.3 For steel strips, the delivery with defect is permitted due to lack of opportunity
for cutting off the defective parts, however, the defective parts shall not exceed 6% of
the total coil length.
Table 6
Class Code Feature
Fairly
high-grade
surface
FB
A small number of surface defects having no impact on formability and adhesion of
coating and plating, e.g. slight scratch, indent, pit, roll mark and oxidation tint are
allowed.
High-grade
surface FC
For the both sides of the product, the better one shall be free from obvious visible
defect and the other at least shall meet the requirements of FB.
Super
high-grade
surface
FD
For the both sides of the product, the better one shall be free of any defect, i.e. having
no impact on coated or plated appearance quality, and the other shall at least meet
the requirements of FB.
...
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Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.