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GB/T 33368-2016 English PDF (GBT33368-2016)

GB/T 33368-2016 English PDF (GBT33368-2016)

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GB/T 33368-2016: Aluminum alloy strips for television

This Standard stipulates the requirements, test methods, inspection rules, marking, packaging, transportation, storage, quality certificate and order sheet (or contract) content of aluminum alloy strips for television. This Standard is mainly applicable to aluminum alloy strips (hereinafter referred to as strips) for displayer, circuit board support and heat dissipation of LCD and LED flat panel TV.
GB/T 33368-2016
NATIONAL STANDARD OF THE
PEOPLE REPUBLIC OF CHINA
ICS 77.150.10
H 61
Aluminum Alloy Strips for Television
ISSUED ON: DECEMBER 30, 2016
IMPLEMENTED ON: NOVEMBER 1, 2017
Issued by: General Administration of Quality Supervision, Inspection and Quarantine;
Standardization Administration of the PEOPLE Republic of
China.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative References ... 4
3 Requirements ... 5
4 Test Methods ... 8
5 Inspection Rules ... 9
6 Marking, Packaging, Transportation, Storage and Quality Certificate ... 11 7 Order Sheet (or contract) Content ... 12
Aluminum Alloy Strips for Television
1 Scope
This Standard stipulates the requirements, test methods, inspection rules, marking, packaging, transportation, storage, quality certificate and order sheet (or contract) content of aluminum alloy strips for television.
This Standard is mainly applicable to aluminum alloy strips (hereinafter referred to as strips) for displayer, circuit board support and heat dissipation of LCD and LED flat panel TV.
2 Normative References
The following documents are indispensable to the application of this document. In terms of references with a specific date, only versions with the specific date are applicable to this document. In terms of references without a specific date, the latest versions (including all the modification orders) are applicable to this document. GB/T 232 Metallic Materials - Bend Test
GB/T 3190 Wrought Aluminum and Aluminum Alloy - Chemical Composition
GB/T 3199 Wrought Aluminum and Aluminum Alloy Products - Packing, Marking, Transporting and Storing
GB/T 3880.3 Wrought Aluminum and Aluminum Alloy Plates, Sheets and Strips for General Engineering - Part 3: Tolerances on Forms and Dimensions
GB/T 7999 Optical Emission Spectrometric Analysis Method of Aluminum and Aluminum Alloys
GB/T 8170 Rules of Rounding off for Numerical Values and Expression and Judgement of Limiting Values
GB/T 16865 Test Pieces and Method for Tensile Test for Wrought Aluminum and Magnesium Alloys Products
GB/T 17432 Methods for Sampling for Analyzing the Chemical Composition of Wrought Aluminum and Aluminum Alloys
GB/T 20975 Methods for Chemical Analysis of Aluminum and Aluminum Alloys 4 Test Methods
4.1 Chemical Composition
4.1.1 The analytical method of chemical composition shall comply with the stipulations in GB/T 20975 or GB/T 7999. The arbitration analysis method shall adopt the method stipulated in GB/T 20975.
4.1.2 ?€?A1?€? content shall be calculated in accordance with the method stipulated in GB/T 3190. In the calculation of ?€?A1?€? content, take the sum of the analytical value of conventional analytical elements and unconventional analytical elements, which are suspected to be excessive, as ?€?the sum of element content?€?.
4.1.3 The determination of analytical value shall adopt rounding-off comparison method. The rounding-off rules of numerical value shall comply with relevant stipulations in GB/T 8170. The rounding-off numerical digit shall be consistent with the limit digit stipulated in GB/T 3190.
4.2 Dimensional Deviation
4.2.1 Dimensional rounding-off
Rounding-off of measured dimensions is not allowed. The determination method of limit value shall comply with the stipulations in GB/T 8170.
4.2.2 Unevenness
Randomly take a sample (length: 2,000 mm) from strips (the sample shall try to include the wavy part of the strips). Freely place the sample on a platform. In accordance with the stipulations in GB/T 3880.3, detect wave height and number of waves. 4.2.3 Others
Other dimensional deviations shall be measured through measuring instruments of corresponding accuracy, or, receive visual inspection.
4.3 Tensile Mechanical Property at Room Temperature
Room-temperature tensile test shall be conducted in accordance with the method stipulated in GB/T 16865.
4.4 Bending Performance
Room-temperature bending performance shall be conducted in accordance with the method stipulated in GB/T 232.
4.5 Appearance Quality
shall be determined as unqualified.
6 Marking, Packaging, Transportation, Storage and
Quality Certificate
6.1 Marking
6.1.1 Product marking
Each coil of strips which are qualified in the inspection shall have an attached label, which includes the following content:
a) Product name;
b) Nameplate;
c) Status;
d) Dimensions;
e) Batch No. or coil No. of strips;
f) Net weight;
g) Inspection stamp of the supply-side?€?s quality inspection department (or quality inspector?€?s signature or stamp)
6.1.2 Marking of packing box
The marking of strips?€? packing box shall comply with the stipulations in GB/T 3199. 6.2 Packaging, Transportation and Storage
Packaging, transportation and storage of strips shall comply with the stipulations in GB/T 3199. When the demand-side has special requirements towards the packaging mode of strips, the demand-side and the supply-side shall determine them through negotiation; this content shall be indicated in the order sheet (or contract). 6.3 Quality Certificate
Each coil of strips shall have an attached product quality certificate, which indicates: a) The supply-side?€?s name;
b) Product name;
c) Nameplate and status;

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