GB/T 32570-2016 English PDF (GBT32570-2016)

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GB/T 32570-2016: Steel plates and strips for freight containers
GB/T 32570-2016
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.140.50
H 46
Steel plates and strips for freight containers
ISSUED ON. FEBRUARY 24, 2016
IMPLEMENTED ON. JANUARY 1, 2017
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 ... 4 
2 Normative references ... 4 
3 Grade representation ... 7 
4 Order contents ... 8 
5 Dimension, shape, weight and tolerance ... 9 
6 Technical requirements ... 9 
7 Test methods ... 13 
8 Inspection rules ... 14 
9 Packaging, symbols and quality certificate ... 14 
10 Rounding off for the test results of mechanical properties and chemical
composition ... 15 
Appendix A (Informative) Comparison table for grades in relevant standards 16 
Appendix B (Informative) Guidelines for evaluating the atmospheric corrosion
resistance of low-alloy steels ... 17 
Foreword
This Standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This Standard was proposed by China Iron and Steel Association.
This Standard shall be under the jurisdiction of the National Technical
Committee for Standardization of Steels (SAC/TC 183).
Main drafting organizations of this Standard. Wuhan Iron and Steel (Group)
Corp., China Metallurgical Information and Standardization Institute, Shougang
Group, CIMC Container Holdings Limited, and Bengang Steel Plates Co., Ltd.
Main drafters of this Standard. Liang Wen, Zeng Ping, Zhang Weixu, Shi Li, Jin
Jing, Zhang Xianfeng, Chen Xiaohong, Liu Gun, He Sidong, Huang Jianguo,
Liu Zhiyong, Chen Jiqing and Tao Wenzhe.
Steel plates and strips for freight containers
1 Scope
This Standard specifies the grade representation, order contents, dimension,
shape, weight, tolerance, technical requirements, test methods, inspection
rules, packaging, symbols and quality certificate of the steel plates and strips
for freight containers.
This Standard is applicable to the hot-rolled steel plates and strips for freight
containers with the thicknesses of 1.0mm to 16.0mm, and the cold-rolled steel
plates and strips for freight containers with the thicknesses of 1.0mm to 2.5mm.
The steel plates and strips are mainly used for manufacturing the freight
containers, and can also be used for manufacturing the camp rooms, transport
vehicles, etc.
2 Normative references
The following documents are essential to the application of this document. For
dated references, only the editions with the dates indicated are applicable to
this document. For undated references, only the latest editions (including all the
amendments) are applicable to this document.
GB/T 222 Permissible tolerances for chemical composition of steel products
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 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 223.12 Methods for chemical analysis of iron, steel and alloy - The
sodium carbonate separation-diphenyl carbazide photometric method for the
determination of chromium content
GB/T 223.14 Methods for chemical analysis of iron, steel and alloy - The N-
benzoy-N-phenylhydroxylamine extraction photometric 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 223.19 Methods for chemical analysis of iron, steel and alloy - The
neocuproine-chloroform extraction photometric method for the determination
of copper content
GB/T 223.23 Iron, steel and alloy - Determination of nickel content - The
dimethylglyoxime spectrophotometric method
GB/T 223.37 Methods for chemical analysis of iron, steel and alloy - The
indophenol blue photometric method for the determination of nitrogen
content after distillation separation
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 223.61 Methods for chemical analysis of iron, steel and alloy - The
ammonium phosphomolybdate volumetric method for the determination of
phosphorus content
GB/T 223.62 Methods for chemical analysis of iron, steel and alloy - The
butyl acetate extraction photometric method for the determination of
phosphorus 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 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 20124 Steel and iron - Determination of nitrogen content - Thermal
conductimetric method after fusion in a current of inert gas (routine method)
GB/T 20125 Low-alloy steel - Determination of multi-element contents -
Inductively coupled plasma atomic emission spectrometric method
3 Grade representation
3.1 The grades of hot-rolled steel plates and strips shall be composed of four
parts. the first letter “Q” of the Chinese phonetic alphabet of the Chinese
character “屈” representing the yield strength; the first letters “NH” and “J” of
the Chinese phonetic alphabets of the Chinese characters “耐候” and “集”; the
lower limit of the yield strength; and the quality grade of steel.
Example 1. Q550NHJE
Q - The first letter of the Chinese phonetic alphabet of the Chinese character “屈” representing the yield
strength;
550 - Specified minimum value of the yield strength, in unit of Megapascal (MPa);
NHJ - The first letters of the Chinese phonetic alphabets of the Chinese characters “耐候” and “集”
respectively representing the weathering steels and freight containers;
E - Quality grade E.
Example 2. Q700JE
Q - The first letter of the Chinese phonetic alphabet of the Chinese character “屈” representing the yield
strength;
700 - Specified minimum value of the yield strength, in unit of Megapascal (MPa);
J - The first letter of the Chinese phonetic alphabet of the Chinese character “集” representing the freight
containers;
E - Quality grade E.
b According to the...