GB/T 6893-2022 PDF English
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB/T 6893-2022 | English | 335 |
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Aluminium and aluminium alloys cold drawn (rolled) tubes
| Valid |
| GB/T 6893-2010 | English | 180 |
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Aluminium and aluminium alloys cold drawn (rolled) seamless tubes
| Obsolete |
| GB/T 6893-2000 | English | 359 |
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Aluminium and aluminium alloy cold drawn (rolled) seamless tubes
| Obsolete |
| GB/T 6893-1986 | English | RFQ |
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Wrought aluminium and aluminium alloy--Drawn (or rolled)tubes for commercial usage
| Obsolete |
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GB/T 6893-2022: Aluminium and aluminium alloys cold drawn (rolled) tubes---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT6893-2022
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.150.10
CCS H 61
Replacing GB/T 6893-2010
Aluminum and aluminum alloys cold drawn (rolled) tubes
Issued on. MARCH 09, 2022
Implemented on. OCTOBER 01, 2022
Issued by. State Administration for Market Regulation;
Standardization Administration of PRC.
Table of Contents
Foreword... 3
1 Scope... 5
2 Normative references... 5
3 Terms and definitions... 6
4 Categories... 7
5 Quality assurance... 8
6 Technical requirements... 9
7 Test method... 16
8 Inspection rules... 20
9 Marking, packaging, transportation, storage, quality certificate... 24
10 Order form (or contract) content... 25
Appendix A (Informative) Process control of aluminum alloy tubes for aviation... 26
Appendix B (Normative) Quality assurance of aluminum alloy tubes for automobiles
... 31
1 Scope
This document specifies the category, quality assurance, technical requirements, test
methods, inspection rules and signs, packaging, transportation, storage, quality
certificates and purchase orders (or contracts) of aluminum and aluminum alloy drawn
(rolled) tubes.
This document applies to aluminum and aluminum alloy drawn (rolled) seamless tubes
and seamed tubes (hereinafter referred to as "tubes").
2 Normative references
The following documents are essential to the application of this document. For the dated
documents, only the versions with the dates indicated are applicable to this document;
for the undated documents, only the latest version (including all the amendments) is
applicable to this standard.
GB/T 242 Metal materials - Tube - Drift-expending test
GB/T 244 Metallic materials - Tube - Bend test
GB/T 246 Metallic materials - Tube - Flattening test
GB/T 467 Copper cathode
GB/T 470 Zinc ingots
GB/T 3190 Chemical composition of wrought aluminium and aluminium alloys
GB/T 3199 Wrought aluminium and aluminium alloy products - Packing, marking,
transporting and storing
GB/T 3246.1 Inspection method for structure of wrought aluminum and aluminum
alloy products Part 1.Inspection method for microstructure
GB/T 3246.2 Inspection method for structure of wrought aluminum and aluminum
alloy products - Part 2.Inspection method for macrostructure
GB/T 3251 Compression test method for aluminium and aluminium alloys tubes
GB/T 3499 Magnesium ingots
GB/T 4436-2012 Wrought aluminum and aluminum alloy tubes - Dimensions and
deviations
GB/T 5126 Eddy current inspection method for cold drawn thin wall tubes of
aluminum and aluminum alloy
GB/T 7998 Method for evaluating the susceptibility to intergranular corrosion of
aluminum alloys
GB/T 7999 Optical emission spectrometric analysis method of aluminum and
aluminum alloys
3 Terms and definitions
The terms and definitions, as defined in GB/T 8005.1, as well as the following terms
and definitions, apply to this document.
3.1
Coiled tubes
Tubes, that are drawn through dies to final dimensions AND delivered in coils.
4 Categories
4.1 Category, designation, status, size specification
The category, designation, status, size specifications shall meet the requirements in
Table 1.
5 Quality assurance
5.1 Aluminum alloy tubes for aviation
See Appendix A for the process control of aluminum alloy tubes for aviation.
5.3 Others
Where there are quality assurance requirements for other types of tubes, it shall be
determined through negotiation between the supplier and the purchaser.
6 Technical requirements
6.1 Chemical composition
The chemical composition of the tube shall comply with the provisions of GB/T 3190.
6.2 Dimensional deviation
The dimensional deviation of the tube shall comply with the provisions of the ordinary
grade in GB/T 4436-2012.If other grades in GB/T 4436-2012 are required, it shall be
determined by the supplier and the buyer through negotiation AND specified in the
order (or contract).
6.3 Mechanical properties
6.4 Flaring performance
6.4.1 There shall be no cracks on the surface of 5B02 alloy tubes for aviation use, after
the flaring test.
6.5 Compression test
There shall be no cracks on the surface of 1035 alloy's O status tubes for aviation use,
6.8 Air tightness
When the buyer has airtight requirements for the seamed tube, it shall be determined
through negotiation between the supplier and the buyer, AND indicated in the order
form (or contract).
6.9 Microstructure
The microstructure of the quenched tube shall not have over-burning.
6.10 Macrostructure
The surface grain size of 3A21 aluminum alloy tubes for aviation shall be better than
the second grade in GB/T 3246.2.If the purchaser has macrostructure requirements for
other alloys, it shall be determined through negotiation between the supplier and the
purchaser AND specified in the order form (or contract).
6.11 Solderability
Seamed tubes shall not have poor welding.
6.12 Salt spray corrosion resistance
6.15 Appearance quality
6.15.1 The surface of the tube shall be the original processed surface; the inner and
Salt spray corrosion resistance level Test duration
Designation Status Tube wall thickness Corrosion depth
outer surfaces of the tube shall be smooth and clean.
7 Test method
7.1 Chemical composition
7.1.1 The chemical composition analysis method shall comply with the provisions of
GB/T 20975 (all parts) or GB/T 7999.The arbitration analysis method shall adopt the
method specified in GB/T 20975 (all parts).
7.1.2 The calculation of "Al" content shall comply with the provisions of GB/T 3190.
When calculating the "Al" content, the sum -- of the analytical values of conventionally
analyzed elements and unconventional analyzed elements suspected to be excessive --
is taken as the "sum of element content".
7.2 Dimensional deviation
The measurement method of dimensional deviation shall be carried out, according to
the provisions of GB/T 4436-2012.
7.3 Mechanical properties
The tensile mechanical property test at room temperature shall be carried out, according
to the provisions of GB/T 16865.
7.4 Flaring test
7.5 Compression test
The compression test shall be carried out, according to the provisions of GB/T 3251.
7.6 Flattening test
The flattening test shall be carried out, according to the provisions of GB/T 246.
7.7 Bending test
The bending test shall be carried out, in accordance with the provisions of GB/T 244.
The bending angle shall be determined through negotiation, between the supplier and
the buyer, meanwhile it shall be specified in the order form (or contract).
7.8 Airtightness
7.11 Solderability
7.14 Eddy current testing
The eddy current flaw detection shall be carried out, according to the provisions of
GB/T 5126.
7.15 Appearance quality
Status Flaring rate % Designation
Visual inspection is used for the appearance quality. When the depth of the defect cannot
be determined, the grinding method can be used for measurement. For tubes which have
an inner diameter of 12 mm ~ 50 mm, the inner surface can be inspected with an
endoscope.
8 Inspection rules
8.1 Inspection and acceptance
8.2 Group-batching
The tubes shall be submitted for acceptance in batches. Each batch shall be composed
of the same category, designation, status, size specification. The batch weight is not
limited.
8.3 Weighing
Tubes shall be weighed to check their weight (unless otherwise agreed upon by both
parties).
8.4 Inspection items
8.5 Sampling
Sampling shall comply with the provisions of Table 10.
8.6.11 If the weldability of any specimen is unqualified, the batch of tubes shall be
deemed unqualified.
8.6.12 If the salt spray corrosion of any specimen is unqualified, it shall take double
quantity of specimens from this batch of products (including the unqualified product in
the original inspection) (or the product represented by the unqualified specimens), for
repeated test. If the repeated test results are all qualified, the batch of products is judged
to be qualified.
8.6.13 If the intergranular corrosion of any specimen is unqualified, it shall take double
quantity of specimens from this batch of products (including the unqualified product in
the original inspection) (or the product represented by the unqualified specimens), for
repeated test.
8.6.14 If the eddy current flaw detection of any product is unqualified, the tube shall be
judged unqualified.
8.6.15 If the appearance quality of any product is unqualified, the tube shall be judged
as unqualified.
9 Marking, packaging, transportation, storage, quality certificate
9.1 Marking
9.1.1 Product marking
Marks shall be made on the tubes that pass the inspection. The marks shall at least
include the following contents.
9.1.2 Packaging box marking
The packing box mark of the tube shall comply with the provisions of GB/T 3199.
9.2 Packaging, transport, storage
9.3 Quality certificate
Each batch of tubes shall be accompanied by a product quality certificate, which
indicates.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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