GB/T 32790-2016 English PDF (GBT32790-2016)

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GB/T 32790-2016: Methods for evaluating the weld quality of seam welds in aluminium and aluminium alloy extrusion
GB/T 32790-2016
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.040.99
Z 24
Methods for Evaluating the Weld Quality of Seam
Welds in Aluminium and Aluminium Alloy Extrusion
ISSUED ON. AUGUST 19, 2016
IMPLEMENTED ON. JULY 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 Etching Method ... 4 
4 Breaking Method ... 4 
5 Flaring test... 7 
6 Tensile Method ... 9 
7 Test report ... 10 
Foreword
This Standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This Standard was proposed by China Nonferrous Metals Industry Association.
This Standard shall be under the jurisdiction of the National Standardization Technical
Committee on Nonferrous Metals (SAC/TC 243).
The main drafting organizations. Liaoning Zhongwang Holdings Limited, Guangzhou
Research Institute of Nonferrous Metals, Shandong Yancon Light Alloy Co., Ltd., China
Nonferrous Metals Techno-Economic Research Institute, Longkou Conglin Aluminium
Co., Ltd., Northeast Light Alloy Co., Ltd., Southwest Aluminium (Group) Co., Ltd., Jilin
Midas Alluminium Co., Ltd., General Research Institute for Nonferrous Metals,
Guangdong Haomei Aluminium Co., Ltd., Guangdong Huachang Aluminium Factory
Co., Ltd. and Fujian Nanping Aluminium Co., Ltd.
The main drafters of this Standard. Ma Shusheng, Gai Hongtao, Huang Xianzhi, Wang
Zhibo, Ge Lixin, Wang Mingkun, Gao Xinyu, Jiang Wei, Wang Lichen, Li Pu, Xiang
Shengqian, Pan Weichen, Chen Junming and Li Honglin.
Methods for Evaluating the Weld Quality of Seam
Welds in Aluminium and Aluminium Alloy Extrusion
1 Scope
This Standard specifies the test method at room temperature for evaluating the weld
quality of seam welds in aluminium and aluminium alloy extrusion.
This Standard applies to the test of the weld quality of seam welds in aluminium and
aluminium alloy (hereinafter referred to as the weld quality).
2 Normative References
The following referenced documents are indispensable for the application of this
document. For dated references, only the edition dated applies to this document. For
undated references, the latest edition of the referenced document (including any
amendments) applies to this Standard.
GB/T 3246.2 Inspection Method for Structure of Wrought Aluminum and Aluminum
Alloy Products – Part 2. Inspection Method for Macrostructure
GB/T 16865 Test Pieces and Method for Tensile Test for Wrought Aluminium and
Magnesium Alloys Products
3 Etching Method
It shall be conducted as specified in GB/T 3246.2.
4 Breaking Method
4.1 Method summary
Conduct the breaking test by applying force on the seam welds in the extrusion of test
pieces; make the test pieces bend, deform significantly or break; then determine the
weld quality of seam welds in the extrusion in accordance with whether the seam welds
in the extrusion breaks or the morphology of fracture. The method applies to the test
pieces in the artificial ageing state.
4.2 Test apparatus
4.2.1 Tester. hydraulic or mechanical pressure tester or universal material testing
machine.
Determine the weld quality in accordance with 4.5.2 to 4.5.5.
6.2 Test method for tensile property
6.2.1 Method summary
Conduct the tensile test for the test pieces containing seam welds; and determine the
weld quality in accordance with the results of the tensile test.
6.2.2 Test apparatus
It shall be as specified in accordance with GB/T 16865.
6.2.3 Preparation of test pieces
Fabricate test pieces in accordance with GB/T 16865; and make the seam welds locate
in the central part of the parallel section of test pieces.
6.2.4 Test procedure
It shall be as specified in GB/T 16865.
6.2.5 Results evaluation
The weld quality is determined to be qualified if the tensile test results meet the
specifications of relevant standards; or else, it is unqualified.
7 Test report
The test report shall include the following content.
a) the number of this Standard;
b) the identification of materials and test pieces;
c) the type of test pieces;
d) the test methods (etching method, breaking method, flaring method, tensile
method – fracture test method and tensile method – tensile property test
method);
e) the test speed;
f) the diagram of seam welds’ positions;
g) the testing equipment;
h) the test results;