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GB/T 20564.6-2010 (GBT20564.6-2010)

GB/T 20564.6-2010_English: PDF (GBT 20564.6-2010, GBT20564.6-2010)
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GB/T 20564.6-2010English70 Add to Cart 0--9 seconds. Auto-delivery Continuously cold rolled high strength steel sheet and strip for automobile -- Part 6: Transformation induced plasticity steel Obsolete GB/T 20564.6-2010

BASIC DATA
Standard ID GB/T 20564.6-2010 (GB/T20564.6-2010)
Description (Translated English) Continuously cold rolled high strength steel sheet and strip for automobile. Part 6: Transformation induced plasticity steel
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard H46
Classification of International Standard 77.140.50
Word Count Estimation 10,128
Date of Issue 2010-09-02
Date of Implementation 2011-06-01
Quoted Standard GB/T 223.5; GB/T 223.9; GB/T 223.11; GB/T 223.23; GB/T 223.26; GB/T 223.53; GB/T 223.59; GB/T 223.60; GB/T 223.63; GB/T 223.64; GB/T 223.67; GB/T 223.68; GB/T 223.69; GB/T 223.71; GB/T 223.72; GB/T 228; GB/T 247; GB/T 708; GB/T 2523; GB/T 2975; GB/T 4336; GB/T 5028; GB/T 8170; GB/T 17505; GB/T 20066; GB/T 20123; GB/T 20125; GB/T 20126
Drafting Organization Baoshan Iron & Steel Co., Ltd.
Administrative Organization National Steel Standardization Technical Committee
Regulation (derived from) National Standard Approval Announcement 2010 No.4 (Total No.159)
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 cold-rolled transformation induced plasticity terms and definitions of high-strength steel sheet and strip, classification code, dimensions, shape, Weight, technical requirements, inspection and test, packaging, marking and quality certificate. This section applies to a thickness of 0. 50 mm ~ 2. 5 mm, mainly for the production of automobile parts and reinforcement of structural steel sheet and strip.

Standards related to: GB/T 20564.6-2010

ICS 77.140.50
H 46
NATIONAL STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
Continuously Cold Rolled High Strength
Steel Sheet and Strip for Automobile
Part 6. Transformation Induced Plasticity
Steel
ISSUED ON. SEPTEMBER 2, 2010
IMPLEMENTED ON. JUNE 1, 2011
Jointly issued by. General Administration of Quality Supervision,
Inspection and Quarantine (AQSIQ);
Standardization Administration (SAC) of the
People’s Republic of China.
GB
3. No action is required - Full-copy of this standard will be automatically &
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Contents
Foreword ... i
1 Scope ... 1
2 Normative References ... 1
3 Term and Definition ... 3
4 Classification and Codification ... 3
5 Ordering Information ... 4
6 Dimensions, Shape, Weight and Permissible Deviation ... 4
7 Technical Requirements ... 4
8 Inspection and Test ... 6
9 Packaging, Marking and Quality Certificate ... 6
10 Numerical Rounding ... 6
11 Cross Reference between Domestic and Foreign Designations ... 6
Appendix A (Informative) Chemical Composition References ... 7
Appendix B (Informative) Cross Reference between Domestic and Foreign Designations ... 8

Foreword
"Continuously Cold Rolled High Strength Steel Sheet and Strip for Automobile" (GB/T
20564) is composed of 7 parts.
- Part 1. Bake Hardening Steel;
- Part 2. Dual Phase Steel;
- Part 3. High Strength Interstitial Free Steel;
- Part 4. High Strength Low Alloy Steel;
- Part 5. Isotropic Steel;
- Part 6. Transformation Induced Plasticity Steel;
- Part 7. Martensitic Steels.
This part is Part 6 of GB/T 20564.
Appendixes A and B of this part are informative.
This part was proposed by the China Iron and Steel Association.
This part is under the jurisdiction of the National Technical Committee on Iron and Steel
of Standardization Administration of China.
Drafting organizations of this part. Baoshan Iron & Steel Co., Ltd., China Metallurgical
Information and Standardization Institute, Shougang Group.
Chief drafting staff of this part. Li Yuguang, Sun Zhongming, Xu Hongwei, Shi Hongyan,
Tu Shulin, Wang Xiaohu, Huang Jinhua, Yu Chengfeng, Tang Mu, Zhu Xiaodong, Wang Li,
Xu Qing.

Continuously Cold Rolled High Strength Steel
Sheet and Strip for Automobile
Part 6. Transformation Induced Plasticity Steel
1 Scope
This part specifies the term and definition, classification, codification, dimensions, shape,
weight, technical requirements, inspection and test, packaging, marking and quality certificate,
etc. for cold-rolled high strength transformation induced plasticity steel sheets and strips
(hereinafter referred to as "steel sheets and strips").
This part is applicable to steel sheets and strips which are 0.50 mm ~2.5 mm in thickness
and mainly used for producing the structural and reinforcing parts of automobile.
2 Normative References
The following documents contain provisions which, through reference in this text,
constitute provisions of this part. For dated reference, subsequent amendments to (excluding
any corrigendum), or revisions of, any of these publications do not apply. However, parties to
agreements 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 223.5 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 223.23 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 223.53 Methods for Chemical Analysis of Iron, Steel and Alloy; The flame
Atomic Absorption Spectrophotometric Method for the Determination of Copper 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 223.67 Iron Steel and Alloy - Determination of Sulfur Content - Methylene Blue
Spectrophotometric Method
GB/T 223.68 Methods for Chemical Analysis of Iron, Steel and Alloy - The Potassium
Iodate Titration Method after Combustion in the Pipe Furnace for the Determination of Sulfur
Content
GB/T 223.69 Iron Steel and Alloy - Determination of Carbon Contents -
Gas-volumetric Method after Combustion in the Pipe Furnace
GB/T 223.71 Methods for Chemical Analysis of Iron, Steel and Alloy - The
Gravimetric Method after Combustion in the Pipe Furnace for the Determination of Carbon
Content
GB/T 223.72 Iron Steel and Alloy - Determination of Sulfur Content - Gravimetric
Method
GB/T 228 Metallic Materials - Tensile Testing at Ambient Temperature
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 Plates and
Sheets
GB/T 2523 Measuring Method of Surface Roughness and Peak Count for Cold-rolled
Metal Sheet (Strip)
GB/T 2975 Steel and Steel Products - Location and Preparation of Test Pieces for
Mechanical Testing
GB/T 4336 STANDARD Test Method for Spark Discharge Atomic Emission
Spectrometric Analysis of Carbon and Low-alloy Steel (Routine Method)
GB/T 5028 Metallic Materials - Sheet and Strip - Determination of Tensile Strain
Hardening Exponent ( n-values)
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 20066 Steel and Iron - Sampling and Preparation of Samples for the
Determination of Chemical Composition

Table 3
Surface structure Code
Pitted surface D
Glossy surface B
5 Ordering Information
5.1 For ordering, the user shall provide the following information.
a) product name (steel sheet or strip);
b) reference of this part;
c) designation;
d) dimensional specification and roughness precision;
e) surface quality class;
f) surface structure;
g) edge condition;
h) manner of packing;
i) weight;
j) purpose;
k) other special requirements.
5.2 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.
6 Dimensions, Shape, Weight and Permissible Deviation
The dimensions, shape, weight and permissible deviation of steel sheets and strips shall
comply with GB/T 708.
7 Technical Requirements
7.1 Chemical composition
See Appendix A for the chemical composition (smelting analysis) references of steels. If
the demander has any requirement for chemical composition, it shall be agreed in order.
7.2 Smelting process
The steels for steel sheets and strips are smelted by oxygen converter or electric furnace;
unless otherwise specified, the smelting process shall be chosen by the supplier.
7.3 Delivery condition
7.3.1 Steel sheets and strips shall be delivered in annealed and leveled condition.
7.3.2 Steel sheets and strips generally are supplied as oiled. The oil film shall be such as can

0.9μm. If the demander has a special requirement of roughness, it shall be agreed in order.
8 Inspection and Test
8.1 Steel sheets and strips are visually inspected for their appearance.
8.2 The dimension and shape of steel sheets and strips shall be measured with appropriate
measuring tools.
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