GB/T 33366-2016 English PDF (GB/T33366-2016)

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GB/T 33366-2016: Wrought Aluminium Alloy Extruded Rods and Bars for Electron Enginery-tank
GB/T 33366-2016
Wrought aluminium alloy extruded rods and bars for electron enginery-tank
ICS 77.150.10
H61
National Standards of People's Republic of China
Aluminum alloy extruded bar for electronic cabinet
Released on December 18,.2016
2017-07-01 implementation
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
China National Standardization Administration issued
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard was proposed by the China Nonferrous Metals Industry Association.
This standard is under the jurisdiction of the National Nonferrous Metals Standardization Technical Committee (SAC/TC243).
This standard was drafted. Southwest Aluminum (Group) Co., Ltd., Nonferrous Metals Technology and Economic Research Institute, Guangdong Haomei Aluminum Co., Ltd.
Division, Liaoning Zhongwang Group Co., Ltd., Northeast Light Alloy Co., Ltd., National Nonferrous Metals Quality Supervision and Inspection Center, Shandong Yankuang Light Union
Jin Co., Ltd., Fujian Nanping Aluminum Co., Ltd., Guangdong Huachang Aluminum Factory Co., Ltd.
The main drafters of this standard. Wang Xiaogang, Peng Zhujun, Ge Lixin, Xiang Shengqian, Gai Hongtao, Wang Guojun, Li Wei, Wang Zhibo, Luo Taotao, Gao Xinyu,
Chen Jingchun, Tang Xingyu.
Aluminum alloy extruded bar for electronic cabinet
1 Scope
This standard specifies the requirements, test methods, inspection rules and signs, packaging, transportation and storage of aluminum alloy extruded bars for electronic cabinets.
Quality certificate and order form (or contract) content.
This standard is applicable to aluminum alloy extruded round bars (hereinafter referred to as bars) used for processing conductive parts in electronic equipment control cabinets.
2 Normative references
The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article.
Pieces. For undated references, the latest edition (including all amendments) applies to this document.
GB/T 231.1 Brinell hardness test for metallic materials - Part 1. Test methods
GB/T 3190 chemical composition of deformed aluminum and aluminum alloy
GB/T 3199 Aluminum and aluminum alloy processing products packaging, marking, transportation, storage
GB/T 3048.2 Test methods for electrical properties of wires and cables - Part 2. Electrical resistivity test
GB/T 3246.1 modified aluminium and aluminium alloys - Test methods - Part 1
GB/T 3246.2 Methods of test for microstructures of aluminium and aluminium alloys - Part 2
GB/T 7999 aluminum and aluminum alloy photoelectric direct reading emission spectrum analysis method
GB/T 8170 Numerical Rounding Rules and Representation and Determination of Limit Values
GB/T 12966 aluminum alloy conductivity eddy current test method
GB/T 16865 Deformed aluminum, magnesium and alloy alloy processed products tensile test samples and methods
GB/T 17432 Modified aluminum and aluminum alloy chemical composition analysis sampling method
GB/T 20975 (all parts) Aluminum and aluminum alloy chemical analysis methods
3 requirements
3.1 Product Classification
3.1.1 Grade, Status and Size Specifications
The grade, condition and diameter of the bar shall comply with the requirements of Table 1.
Table 1 Grade, status and diameter
Grade status
diameter
Mm
6082 T6 30.0~350.0
3.1.2 Marking and examples
Product marks are expressed in the order of product name, this standard number, grade, status and size specifications. Examples of tags are as follows.
Example 1.
6082 grade, T6 state,.200.0mm diameter indeterminate rod, marked as.
Bar GB/T 33366-6082T6-φ200
Example 2.
Bars of 6082 grade, T6 state, diameter.200.0mm, length of 6000mm, marked as.
Bar GB/T 33366-6082T6-φ200×6000
3.2 Chemical composition
The chemical composition of the bar should meet the requirements of GB/T 3190.
3.3 Dimensional deviation
3.3.1 Diameter
The diameter deviation of the bar should meet the requirements of Table 2.
Table 2 diameter deviation unit is mm
diameter
Diameter tolerance
Positive deviation negative deviation
30.0~50.0 0 -1.5
>50.0~80.0 0 -1.8
>80.0~120.0 0 -2.1
>120.0~180.0 0 -2.4
>180.0~250.0 0 -2.8
>250.0~300.0 0 -3.2
>300.0~350.0 0 -4
3.3.2 Length
Bars supplied in fixed lengths with a tolerance of 15
0 mm. For bars supplied with multiple feet, add 5mm to each kerf
Sawing the allowance.
3.3.3 Cutting slope
The end face of the bar should be cut flat. Bars with a diameter of less than 50.0mm, the slope is not more than 5°; bars with a diameter of not less than 50.0mm, cut
The slope is not more than 3°.
3.3.4 Bending
The bending of the bar shall comply with the requirements of Table 3.
Table 3 The bending unit of the bar is in millimeters
diameter
Bar bending
Any length of 300mm on the length of each meter
30.0~80.0 ≤0.6 ≤2.0
>80.0~120.0 ≤1.0 ≤2.0
Table 3 (continued) Unit is mm
diameter
Bar bending
Any length of 300mm on the length of each meter
>120.0~200.0 ≤1.5 ≤3.0
>200.0~250.0 ≤2.0 ≤4.0
>250.0~300.0 ≤3.0 -
>300.0~350.0 ≤4.0 -
3.4 tensile mechanical properties at room temperature
The longitudinal tensile mechanical properties of the bar at room temperature shall comply with the requirements of Table 4, and the diameter exceeds the bar specified in Table 4, and the longitudinal tensile mechanics at room temperature
The performance is negotiated between the supplier and the buyer, and is indicated in the order form (or contract), and the measured results are attached when not indicated.
Table 4 tensile mechanical properties at room temperature
Grade status
diameter
Mm
Tensile strength Rm
MPa
Specify non-proportional extension strength Rp0.2
MPa
Elongation after break A
not less than
6082 T6
≥30~150 310 260 8
>150~200 280 240 6
>200~250 270.200 6
3.5 Brinell hardness
The Brinell hardness of the bar shall comply with the requirements of Table 5, and the diameter exceeds the bar specified in Table 5. The Brinell hardness is negotiated between the supplier and the buyer, and
Indicated in the order form (or contract), with the results of the test without any indication.
Table 5 Brinell hardness
Alloy state
diameter
Mm
Brinell hardness HBW
6082 T6 60~200 ≥95
3.6 Conductivity
The conductivity of the 6082 alloy T6 state shall comply with the requirements of Table 6. The specification exceeds the bar specified in Table 6, and the conductivity is determined by both the supplier and the buyer.
Negotiate and indicate in the order form (or contract), if not indicated, the measured results are attached.
Table 6 Conductivity
Alloy state
diameter
Mm
Conductivity
MS/m
6082 T6 60~200 ≥26
3.7 Low-magnification organization
3.7.1 The oxide film on the low-profile tissue of the bar shall comply with the requirements of Table 7.
Table 7 Oxide film
Defect name inspection area
Defect length per point
≤0.3mm >0.3mm~2.0mm >2.0mm
Oxide film full section allowed to exist ≤ 4 points are not allowed to exist
3.7.2 Cracks, shrinkage tails, pores, bright grains, non-metallic inclusions, foreign metal inclusions and white are not permitted in low-strength tissue samples of bars.
Spot defects such as spots and primary crystals exist.
3.7.3 The depth of the layer on the low-profile tissue of the bar should not exceed half the allowable negative deviation of the bar. When unlined bars are required, they should be supplied
Both parties need to negotiate and indicate in the order form (or contract).
3.8 Microstructure
The microstructure of the bar does not allow over-burning.
3.9 Appearance quality
3.9.1 Cracks, bubbles and corrosion spots are not permitted on the surface of the bar.
3.9.2 The surface of the bar is allowed to have a crater whose depth does not exceed half of the negative deviation of the diameter, scratches, bruises, scratches, oxidized colors, black and white spots.
And defects such as straightening marks.
4 Test methods
4.1 Chemical composition
4.1.1 The chemical composition analysis method should meet the requirements of GB/T 20975 or GB/T 7999, and the arbitration analysis should adopt the GB/T 20975 regulation.
The method of setting.
4.1.2 Perform regular chemical analysis only on elements other than the “aluminum” and “others” of the 6082 grade in GB/T 3190. Be pregnant
Producers should analyze these elements when the quality scores of suspected non-conventional analysis elements exceed the limits of this standard.
4.1.3 “Al” content is calculated according to the method specified in GB/T 3190. When calculating the “Al” content, the conventional analytical elements and the suspected excess are very
The analysis analyzes the sum of the values of the elements as the sum of the element contents.
4.1.4 The judgment of the analytical value is based on the comparison comparison method. The numerical repair rules are carried out in accordance with the relevant provisions of GB/T 8170. The repaired digits should be
The limit digits specified in GB/T 3190 are consistent.
4.2 Size inspection
4.2.1 Curvature
Place the bar on the platform and extend the 300mm (or 1000mm) long ruler (or knife ruler) along the bar length when the weight is reached.
The direction is on the surface of the bar, and the maximum gap value hs between the bar and the ruler (or the ruler) is measured, then hs is every 300 mm (or per
Meter) The degree of curvature in length, as shown in Figure 1.
4.2.2 Bar diameter
The diameter of the bar should be measured with a gauge of not less than 0.02 mm.
figure 1
4.2.3 Length, cut slope
The length and cutting slope of the bar shall be measured with a measuring instrument of a corresponding precision or a special instrument.
4.3 Tensile mechanical properties at room temperature
The test method for the longitudinal tensile mechanical properties of bars at room temperature is carried out in accordance with the provisions of GB/T 16865.
4.4 Brinell hardness
The Brinell hardness test method for bars is carried out in accordance with the provisions of GB/T 231.1.
4.5 Conductivity
Conductivity testing of bars shall comply with the provisions of GB/T 12966 or GB/T 3048.2. Arbitration shall be in accordance with the provisions of GB/T 3048.2
get on.
4.6 low-fold organization
The low-spectrum inspection method of bars should meet the requirements of GB/T 3246.2.
4.7 Microstructure
The microstructure inspection method of bars shall comply with the provisions of GB/T 3246.1.
4.8 Appearance quality
The surface quality of the bar is visually inspected and can be measured by the grinding method when the depth of the defect is difficult to determine.
5 Inspection rules
5.1 Inspection and acceptance
5.1.1 The product shall be inspected by the supplier to ensure that the product quality complies with the requirements of this standard and the order form (or contract), and fill in the quality certificate.
Book.
5.1.2 The acquirer shall inspect the products received in accordance with the provisions of this standard. Inspection results and the provisions of this standard and the order form (or contract)
In case of discrepancy, it shall be submitted to the supplier in writing and shall be settled by negotiation between the supplier and the buyer. Objections that are subject to appearance quality and dimensional deviation should be received
The objection to other performance within one month from the date of the product shall be filed within 3 months from the date of receipt of the product. If arbitration is required,
It is carried out by the unit approved by both parties and is sampled together by the demander.
5.2 Batch
Bars should be submitted for acceptance in batches, and each batch should consist of the same grade, status and size specifications.
5.3 Weight
Bars should be weighed.
5.4 Inspection items
Each batch of bar should be subjected to chemical composition, dimensional deviation, mechanical properties, Brinell hardness, electrical conductivity, low-fold microstructure, microstructure and
Inspection of appearance quality.
5.5 Sampling
Sampling of bars should be in accordance with Table 8.
Table 8 sampling regulations
Inspection item sampling requirements
experiment method
Chapter number
The chemical composition is in accordance with GB/T 17432 3.2 4.1
The sample size deviation is specified in Table 9. 3.3 4.2
Tensile mechanical properties at room temperature a
The number of samples shall be cut at the extrusion front end of each bar as specified in Table 9.
1 sample
3.4 4.3
Brinell hardness a
The number of samples shall be cut at the extrusion front end of each bar as specified in Table 9.
1 sample
3.5 4.4
Conductivity a The number of samples is as specified in Table 3.6 4.5
Low-magnification
The number of samples is cut according to Table 9, and the extruded end of each bar is taken.
1 sample
3.7 4.6
Microstructure a solution heat treatment furnace high temperature area cut, the number of samples 2 3.8 4.7
Appearance quality inspection by root 3.9 4.8
a The room temperature tensile mechanical properties, Brinell hardness, electrical conductivity and microstructure of the bar, the production plant samples according to the heat treatment furnace, and samples are taken in batches during arbitration.
Table 9 Sample quantity
Number of batches per furnace
Number of samples
≤50 2
>50~90 3
>90~150 5
>150~280 8
>280~500 13
>500~1200 20
5.6 Determination of test results
5.6.1 When the chemical composition of any sample is unqualified, the bar can distinguish the melting time and the melting point represented by the sample is unqualified.
Inspection, qualified delivery. It is impossible to distinguish the melting order and the batch is unqualified.
5.6.2 If the dimensional deviation of any sample is unqualified, the batch of bars is judged to be unqualified, but it is allowed to be inspected one by one, and the qualified ones are delivered.
5.6.3 When t...