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GB/T 20564.4-2010 English PDF (GBT20564.4-2010)

GB/T 20564.4-2010 English PDF (GBT20564.4-2010)

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GB/T 20564.4-2010: Continuously cold rolled high strength steel sheet and strip for automobile -- Part 4: High strength low alloy steel

This Standard specifies the terms and definitions, sample preparation, test for physical properties of covers, penetration analysis determination method for inside liners of tyres, test for physical properties of inner tubes and test for physical properties of flaps for test methods for measuring physical properties of pneumatic tyres (covers, inner tubes and flaps).
GB/T 20564.4-2010
GB
NATIONAL STANDARD OF
THE PEOPLE REPUBLIC OF CHINA
ICS 77.140.50
H 46
Continuously cold rolled high strength
steel sheet and strip for automobile ?€?
Part 4. High strength low alloy 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 ... 10
9 Numerical rounding-off ... 11
10 Packaging, marks and quality certificate ... 11
11 Similar control of designations home and abroad ... 11
Annex A (Informative) Chemical composition reference value ... 12
Annex B (Informative) Similar control of designations home and abroad ... 13 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 4th 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, Qiao
Jianjun, Wang Li, Zhu Xiaodong, Xu Qing.
Continuously cold rolled high strength
steel sheet and strip for automobile -
Part 4. High strength low alloy 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 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 3.0 mm mainly used for automotive structural parts and reinforcements.
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 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. 3.1 high strength low alloy steels (LA)
In the low carbon steel, the microalloying elements such as niobium, titanium and vanadium are added by single or compound, and the carbonitride
particles are precipitated to strengthen, and the grain strength of the 5 Information required by order
5.1 The user shall provide the following information when ordering.
a) product name (steel sheet or strip);
b) reference to this Part;
c) designation;
d) specifications and size, roughness accuracy;
e) surface quality level;
f) surface structure;
g) edge status;
h) packaging method;
i) weight;
j) use;
k) other special requirements.
5.2 If the order contract does not indicate the size and roughness accuracy, surface quality level, surface structure type, edge status and packaging and other information, the products of this Standard shall be delivered according to the trimmed steel sheet and strip of ordinary size and unevenness
accuracy, more advanced finishing surface, pitting surface. The products shall be packed in the method provided by the supplier.
6 Size, shape, weight and tolerance
The size, shape, weight and tolerance of steel sheet and strip shall comply with the provisions of GB/T 708.
7 Technical requirements
7.1 Chemical composition
Refer to Annex A for the chemical composition of the steel (smelting analysis). If the purchaser has chemical composition requirements, it shall be
negotiated when ordering.

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