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GB/T 34200-2017 English PDF (GBT34200-2017)

GB/T 34200-2017 English PDF (GBT34200-2017)

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GB/T 34200-2017: Cold rolled stainless steel plate, sheet and strip for construction roof and curtain

This Standard specifies the ordering content, dimension, shape, weight, technical requirements, test methods, inspection rules, package, marking, and quality certificate of cold rolled stainless steel plate, sheet and strip for construction roof and curtain. This Standard is applicable to the wide cold-rolled steel strip for construction roof and curtain with a thickness of 0.3mm to 4.0mm as well as its coil slitting cut-to-size steel plate and sheet (hereinafter referred to as coil slitting steel plate and sheet), and wide coldrolled steel strip with longitudinal shear.
GB/T 34200-2017
GB
NATIONAL STANDARD OF THE
PEOPLE REPUBLIC OF CHINA
ICS 77.140.50
H 46
Cold rolled stainless steel plate, sheet and
strip for construction roof and curtain
ISSUED ON. SEPTEMBER 7, 2017
IMPLEMENTED ON. JUNE 1, 2018
Issued by. General Administration of Quality Supervision, Inspection and Quarantine of the PEOPLE Republic of China;
Standardization Administration of the PEOPLE Republic of
China.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative references ... 4
3 Ordering content ... 6
4 Dimension, shape, and weight ... 7
5 Technical requirements ... 8
6 Test methods ... 12
7 Inspection rules ... 12
8 Package, marking, and quality certificate ... 13
Annex A (Informative) Recommended regions for each designation ... 14
Annex B (Informative) Comparison table for similar designations of this Standard and relevant standards ... 15
Cold rolled stainless steel plate, sheet and
strip for construction roof and curtain
1 Scope
This Standard specifies the ordering content, dimension, shape, weight, technical requirements, test methods, inspection rules, package, marking, and quality certificate of cold rolled stainless steel plate, sheet and strip for construction roof and curtain.
This Standard is applicable to the wide cold-rolled steel strip for construction roof and curtain with a thickness of 0.3mm to 4.0mm (hereinafter referred to as wide steel strip) as well as its coil slitting cut-to-size steel plate and sheet (hereinafter referred to as coil slitting steel plate and sheet), and wide cold- rolled steel strip with longitudinal shear (hereinafter referred to as wide steel strip with longitudinal shear).
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 223.11 Iron, steel and alloy -- Determination of chromium content -- Visual titration or potentiometric titration method
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 223.18 Methods for chemical analysis of iron, steel and alloy -- The sodium thiosulfate separation iodimetric method for the determination of copper content
GB/T 223.25 Methods for chemical analysis of iron, steel and alloy -- The dimethylglyoxime gravimetric method for the determination of nickel content GB/T 223.26 Iron, steel and alloy -- Determination of molybdenum content - - The thiocyanate spectrophotometric method
GB/T 223.28 Methods for chemical analysis of iron, steel and alloy -- The ??- benzoin oxime gravimetric method for the determination of molybdenum
content
GB/T 223.36 Methods for chemical analysis of iron, steel and alloy -- The neutral titration 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 223.53 Methods for chemical analysis of iron, steel and alloy -- The flame atomic absorption spectrophotometric method for the determination of copper content
GB/T 223.58 Methods for chemical analysis of iron, steel and alloy -- The sodium arsenite-sodium nitrite titrimetric method for the determination of manganese content
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 228.1-2010 Metallic materials -- Tensile testing -- Part 1. Method of test at room temperature
GB/T 230.1 Metallic materials -- Rockwell hardness test -- Part 1. Test method (scales A, B, C, D, E, F, G, H, K, N, T)
GB/T 231.1 Metallic materials -- Brinell hardness test -- Part 1. Test method GB/T 232 Metallic materials -- Bend test
GB/T 247 General rule of package mark and certification for steel plates (sheets) and strips
4# surface
General-purpose
polishing on one or both
sides
Discontinuous
linear texture, and
reflective
USE 150# to 320# abrasive belt for
grinding and leveling
HL surface Cold rolling, pickling, leveling, and grinding
Continuous
abrasion pattern
USE 150# to 320# abrasive belt for
polishing and leveling, so that the
surface shows continuous abrasion
pattern.
BA surface Cold rolling, and bright annealing
Smooth, bright,
and reflective
Bright annealing is performed in a
controlled atmosphere furnace after
cold rolling. Dry hydrogen or a
mixture of dry hydrogen and dry
nitrogen is generally used to
prevent oxidation during annealing.
It is also a commonly used surface
processing for post-process
reprocessing.
5.6.2 Surface quality of steel plates, sheets and strips
5.6.2.1 The steel plates and sheets shall not have defects that will affect their use. There may be some minor pitting of which the individual depth is less than half of the thickness tolerance, scratches, indentations, pits, roll marks, chromatic aberrations, and other defects that do not affect the use. Partial grinding is allowed, but the minimum thickness of the steel plate and sheet shall be guaranteed.
5.6.2.2 The steel strips shall not have any defects that will affect their use. However, the delivered steel strips in coil generally do not have the opportunity to remove defects, allowing for a small number of abnormalities. For steel strips that are not polished, it is allowed to have minor pitting of which the individual depth is less than half of the thickness tolerance, scratches, indentations, pits, roll marks, chromatic aberrations, and other defects that do not affect the use. 5.6.2.3 The edge of the steel strip shall be smooth. The edge of the trimming strip shall not have uneven cutting of which the depth is greater than half the width tolerance and burrs of which the depth is greater than the thickness tolerance of the steel strip. The un-trimming steel strips shall not have raw edges that are greater than the width tolerance.
5.7 Special requirements
According to the requirements of the demander, special requirements can be made on the chemical composition, mechanical properties, non-metallic
inclusions, corrosion resistance, etc. of steel plates, sheets and strips. The specific content is negotiated between the supplier and the demander.
batch shall consist of steel plates (sheets) or strips of the same designation, same furnace number, same thickness, and same heat treatment system.
7.3 The sample size, sampling methods and parts of steel plates, sheets and strips shall comply with the provisions of Table 9.
7.4 The retesting and determination of steel plates, sheets and strips shall comply with the provisions of GB/T 17505.
7.5 The test results of mechanical properties and chemical compositions shall be rounded off using the rounding off comparison method. The rules for
rounding off shall comply with the provisions of GB/T 8170.
8 Package, marking, and quality certificate
The package, marking, transportation, storage, and quality certificate of steel plates, sheets and strips shall comply with the provisions of GB/T 247.

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