GB/T 20564.5-2010 English PDF (GBT20564.5-2010)

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GB/T 20564.5-2010: Continuously cold rolled high strength steel sheet and strip for automobile -- Part 5: Isotropic steel
GB/T 20564.5-2010
GB
NATIONAL STANDARD OF
THE PEOPLE’S REPUBLIC OF CHINA
ICS 77.140.50
H 46
Continuously cold rolled high strength steel sheet
and strip for automobile - Part 5. Isotropic steel
ISSUED ON. SEPTEMBER 2, 2010
IMPLEMENTED ON. JUNE 1, 2011
Issued by. General Administration of Quality Supervision, Inspection
and Quarantine;
Standardization Administration Committee.
3. No action is required - Full-copy of this standard will be automatically and
immediately delivered to your EMAIL address in 0~60 minutes.
Table of Contents
Foreword ... 3 
1 Scope ... 4 
2 Normative references ... 4 
3 Terms and definitions ... 6 
4 Classification and code ... 7 
5 Information required by order ... 8 
6 Size, shape, weight and tolerance ... 8 
7 Technical requirements ... 8 
8 Inspection and test ... 11 
9 Numerical rounding-off ... 11 
10 Packaging, marks and quality certificate ... 12 
11 Similar control of designations home and abroad ... 12 
Annex A (Informative) Chemical composition reference value ... 13 
Annex B (Informative) Similar control of designations home and abroad ... 14 
Foreword
GB/T 20564 Continuously cold rolled high strength steel sheet and strip for
automobile consists 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 the 5th part of GB/T 20564.
Annex A and Annex B of this Part are informative.
This Part was proposed by China Iron and Steel Industry Association.
This Part shall be under the jurisdiction of National Technical Committee on
Steels of Standardization Administration of China.
The drafting organizations of this Part. Baoshan Iron and Steel Co., Ltd.,
Metallurgical Industry Information Standards Institute, CAPITAL IRON and
STEEL CORP.
Main drafters of this Part. Li Yuguang, Shi Hongyan, Sun Zhongming, Xu
Hongwei, Tu Shulin, Wang Xiaohu, Huang Jinhua, Yu Chengfeng, Xiong
Aimen, Wang Li, Zhu Xiaodong, Xu Qing.
Continuously cold rolled high strength
steel sheet and strip for automobile -
Part 5. Isotropic steel
1 Scope
This Part specifies the dimensions, shape, weight, technical requirements,
test methods, inspection rules, packaging, marks and quality certificate of
cold rolled high strength isotropic steel sheet and strip (hereinafter referred to
as steel sheet and strip).
This Part is applicable to steel sheet and strip of thickness not greater than
2.5 mm mainly used for automotive outer panels.
2 Normative references
The following standards contain the provisions which, through reference in
this Part, constitute the provisions of this Part. For dated references,
subsequent amendments (excluding corrections) or revisions do not apply to
this Part. However, the parties who enter into agreement based on this Part
are encouraged to investigate whether the latest versions of these documents
are applicable. For undated reference documents, the latest versions apply to
this Part.
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 223.13, Methods for chemical analysis of iron, steel and alloy - The
ammonium ferrous sulfate titration method for the determination of
vanadium content
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 223.60, 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 223.75, Iron steel and alloy - Determination of boron content -
Methanol distillation-curcumin photometric method
GB/T 223.76, Methods for chemical analysis of iron, steel and alloy - The
flame atomic absorption spectrometric method for the determination of
vanadium content
GB/T 223.78, Methods for Chemical Analysis of Iron, Steel and Alloy -
Curcumin Spectrophotometric Method for the Determination of Boron
Content
GB/T 228, Metallic materials - Tensile testing
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
plate
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 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 5028, Metallic materials - Sheet and strip - Determination of tensile
strain hardening exponent
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, Unalloyed steel - Determination of low carbon content - Part 2.
Infrared absorption method after combustion in an induction furnace (with
preheating)
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
...