GB/T 20564.3-2007 in English

《GB/T 20564.3-2007汽车用高强度冷连轧钢板及钢带 第3部分：高强度无间隙原子钢》由TC183（全国钢标准化技术委员会）归口，主管部门为中国钢铁工业协会。
本部分规定了冷连轧高强度无间隙原子钢板及钢带的术语和定义、尺寸、允许偏差及外形、技术要求、试验方法、检验规则、包装、标志及产品质量证明书。 本部分规定的钢板和钢带主要用于汽车外板、内板和部分结构件，钢板和钢带的厚度为0.60～2.5mm。

1 Scope

This part specifies the terms and definitions, classification and codification, dimensions, shape, weight, technical requirements, inspection and test, packaging, marking and quality certificate for cold-rolled high strength interstitial free steel sheets and strips (hereinafter referred to as "steel sheets and strips").
The steel sheets and strips specified in this part mainly are used in inner and outer sheets and some structural parts for automobile and are 0.60 mm~2.5 mm in thickness.

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 223.3 Methods for Chemical Analysis of Iron, Steel and Alloy - The Diantipyrylmethane Phosphomolybdate Gravimetric Method for the Determination of Phosphorus Content
GB/T 223.5 Methods for Chemical Analysis of Iron, Steel and Alloy - The Reduced Molybdosilicate Spectrophotometric Method for the Determination of Acid-soluble Silicon Content
GB/T 223.9 Methods for Chemical Analysis of Iron, Steel and Alloy - the Chrom Azurol S Photometric Method for the Determination of Aluminium Content
GB/T 223.10 Methods for Chemical Analysis of Iron, Steel and Alloy - The Cupferron Separation-Chrome Azurol S Photometric Method for the Determination of Aluminium 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 Methods for Chemical Analysis of Iron, Steel and Alloy - The Anion-Exchange Separation-Sulphochlorophenol S Photometric Method for the Determination of Niobium Content
GB/T 223.59 Methods for Chemical Analysis of Iron, Steel and Alloy - The Reduced Molybdoantimonyl Phosphoric Acid Photometric Method for the Determination of Phosphorus Content
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 Methods for Chemical Analysis of Iron, Steel and Alloy - The Flame Atomic Absorption Spectrometric Method for the Determination of Manganese Content

Foreword i
1 Scope
2 Normative References
3 Term and Definition
4 Classification and Codification
5 Ordering Information
6 Dimensions, Shape, Weight and Permissible Deviation
7 Technical Requirements
8 Inspection and Test
9 Packaging, Marking and Quality Certificate
10 Numerical Rounding
11 Cross Reference between Domestic and Foreign Designations
Appendix A (Informative) Chemical Composition of Steels
Appendix B (Informative) Cross Reference between Domestic and Foreign Designations