Foreword
Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative.
This document is developed in accordance with the rules given in GB/T 1.1-2020 Directives for standardization - Part 1: Rules for the structure and drafting of standardizing documents.
This document replaces GB/T 6893-2010 Aluminium and aluminium alloys cold drawn (rolled) seamless tubes. In addition to changes in structure and editorial changes, the following main technical changes have been made with respect to GB/T 6893-2010:
a) The application scope has been extended to cover “bridge tubes” (see Clause 1 hereof and Clause 1 of 2010 edition);
b) The term "coiled tubes" has been added to the clause "Terms and definitions" (see 3.1);
c) The designations and states of 2017A O, 2017A T3, 2024 T3, 2D12 O, 2D12T4, 2A14 O, 2A14T6, 3003 H12, 3003 H24, 3003 H18, 3A21H12, 3026 O, 3103 O, 5B02 O, 6061 T8, 6082 T4, 6082 T6, 7A09 T6, 7075 T6 have been added; 2017 designation has been deleted; and T4 state of 2024 designation has been deleted (see 4.1 hereof and 3.1.1 of 2010 edition);
d) The quality assurance requirements have been added (see Clause 5).
e) The mechanical properties of new designations and states have been added; the dimension range of mechanical properties limited to "all properties" in the original standard has been changed; and the performance requirements of O-state T42 and T62 tubes have been added (see Table 2 hereof and Table 2 of 2010 edition);
f) The drift expanding performance of 5B02 aeronautical alloy tubes has been added (see 6.4);
g) The compression performance of 1035 aeronautical designation has been added (see 6.5);
h) The flattening performance of O-state 5B02 and 5A02 aeronautical alloy has been added (see 6.6);
i) The bending performance of 5B02 aeronautical alloy has been added (see 6.7);
j) The air tightness requirements for bridge tubes have been added (see 6.8);
k) The subclause "Microstructure” has been modified (see 6.9 hereof and 3.5 of 2010 edition);
l) The requirements for macrostructure of 3A21 aeronautical alloy have been added (see 6.10);
m) The welding performance of bridge tubes have been added (see 6.11);
n) The salt spray corrosion resistance of automotive aluminium alloy tubes has been added (see 6.12);
o) The intergranular corrosion performance of 2D12 and 2017A alloys has been added (see 6.13);
p) The subclause “Eddy current inspection” has been modified (see 6.14 hereof and 3.6 of 2010 edition);
q) The subclause “Appearance quality” has been modified (see 6.15 hereof and 3.7 of 2010 edition);
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. The issuing body of this document shall not be held responsible for identifying any or all such patent rights.
This document was proposed by China Nonferrous Metals Industry Association.
This document is under the jurisdiction of National Technical Committee on Nonferrous Metals of Standardization Administration of China (SAC/TC 243).
This document was issued in 1986 for the first time; its first revision was issued in 2000, its second revision was issued in 2010 and this is the third revision.
Aluminium and aluminium alloys cold drawn (rolled) tubes
1 Scope
This document specifies the classification, quality assurance, technical requirements, test methods, inspection rules and marking, packaging, transportation and storage, as well as quality certificates and order (or contract) contents of aluminium and aluminium alloys cold drawn (rolled) tubes.
This document is applicable to the aluminium and aluminium alloys cold drawn (rolled) seamless and bridge tubes [hereinafter referred to as the "tube(s)"].
2 Normative references
The following documents contain requirements which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies.
GB/T 242 Metallic materials - Tube - Drift expanding test
GB/T 244 Metallic materials - Tube - Bend test method
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 aluminium and aluminium 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 Test method for intergranular corrosion of aluminium alloy
GB/T 7999 Optical emission spectrometric analysis method of aluminum and aluminum alloys
GB/T 8005.1 Aluminium and aluminium alloys terms and definitions - Part 1: Product and method of processing and treatment
GB/T 8170 Rules of rounding off for numerical values & expression and judgment of limiting values
GB/T 12967.3 Test methods for anodic oxidation coatings and organic polymer coatings on aluminium and aluminium alloys - Part 3: Salt spray test
GB/T 16865 Test pieces for tensile test for wrought aluminum and magnesium alloy products
GB/T 17432 Methods of sampling for analyzing the chemical composition of wrought aluminum and aluminum alloy
GB/T 20975 (All parts) Methods for chemical analysis of aluminium and aluminium alloys
GB/T 27677 Aluminium hardeners
GB/T 32790 Methods for evaluating the weld quality of seam welds in aluminium and aluminium alloy extrusion
YS/T 447.1 Alloy wires used for the grain refiner for aluminium and aluminium alloys - Part 1: Al-Ti-B wires
YS/T 591 Heat treatment of wrought aluminium and aluminium alloy
YS/T 665 Refined aluminium ingot for remelting
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 8005.1 and the following apply.
3.1
coiled tubes
tubes drawn to the final dimension by die and delivered in coils
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Classification
5 Quality assurance
6 Technical requirements
7 Test methods
8 Inspection rules
9 Marking, packaging, transportation, storage and quality certificate
10 Order (or contract) contents
Annex A (Informative) Procedure control of aeronautical aluminium alloy tubes
Annex B (Normative) Quality assurance of automotive aluminium alloy tubes
