Some standard content:
GB/T3195—1997
Conductive aluminum wire mainly guides the drawing of pure aluminum wire for electrical industry. With the improvement of my country's scientific and technological level, the original national standard can no longer meet the needs of the majority of users. In order to improve the dimensional accuracy, resistivity and other technical indicators of conductive aluminum wire, this standard is specially formulated. This standard is proposed by China Nonferrous Metals Industry Corporation. This standard is under the jurisdiction of the Standard Metrology Institute of China Nonferrous Metals Industry Corporation. This standard is drafted by Northeast Light Alloy Processing Plant. The main drafters of this standard are: Lv Xinyu, Zhang Wen, Huang Yongqing. This standard shall replace GB319582 from the date of entry into force. 660
1 Scope
National Standard of the People's Republic of China
Aluminum wires for electric conduction purporseGB/T3195—1997
Replaces GB319582
This standard specifies the varieties, requirements, test methods, inspection rules and marking, packaging, transportation and storage of aluminum wires for electric conduction. This standard applies to industrial pure aluminum drawn wire for electric conduction. Referenced Standards
The provisions included in the following standards constitute the provisions of this standard through reference in this standard. At the time of publication of the standard, all versions are valid. All versions will be revised, and parties using this standard should explore the possibility of using the latest version of the following standards. GB/T228--87Methods for tensile testing of metals
GB/T238-84Methods for repeated bending testing of metal wiresGB/T3190-1996Chemical composition of deformed aluminum and aluminum alloysGB/T3199-1996Packaging, marking, transportation and storage of aluminum and aluminum alloy processed productsGB/T6987Chemical analysis methods for aluminum and aluminum alloys3Contents of ordering contracts
The ordering contracts listed in this standard shall include the following contents:3.1Product name.
3.2Brand and state.
3.3Effective resistance level.
3.4Specifications and tolerances of size.
3.5Weight or number of discs
3.6Standard number.
3.7Others.
4Requirements
4.1Product classification
The brand, state and specifications of the product shall comply with the provisions of Table 1. Table 1 Brand, state, specification
Note: If other brands and specifications of wire are required, the supply and demand parties shall negotiate and indicate it in the contract. 4.2 Marking example
Ordinary wire made of 1A50, H19 state, 3.00mm diameter is marked as: State Technical Supervision Bureau approved on December 22, 1997
Diameter, mm
0.80-5.00
Implementation on August 1, 1998
GB/T3195—1997
1A50-H19 3.00 GB/T 3195—19974.3 Chemical composition
The chemical composition of the wire shall comply with the provisions of GB/T3190. 4.4 Dimensions and allowable deviations
The wire diameter and allowable deviations shall conform to the provisions of Table 2 Table 2 Wire diameter and allowable deviations
0.80~1.00
≥1.00～2.00
>2. 00~~3. 00
>3. 00～5. 00
4.5 Mechanical properties
Ordinary grade
The room temperature longitudinal mechanical properties of wire shall conform to the provisions of Table 3. Table 3 Mechanical properties
Process properties
Diameter, mm
0. 80-~1. 00
>1. 00~~1. 50
>1. 50~2. 00
>2. 00 ~3. 00
>3. 00~4. 00 | | tt | 00
4. 00~4. 50
4.50~5.00
Allow burial deviation,
Mechanical properties
Tensile strength, MPa
The number of repeated bending of the wire shall comply with the provisions of Table 4 without breaking. Table 4 Process properties
4.7 Effective resistance
Diameter, mm
1.50~4.00
>4. 00~5. 00
High precision grade
Elongation, %
Bending times, not less than
The effective resistance of the wire at a temperature of 20℃, a cross-sectional area of 1mm and a length of 1m shall comply with the provisions of Table 5. 662
4.8 Surface quality
Ordinary grade, n
GB/T3195—1997
Table 5 Effective resistance
High precision grade, 0
.0. 028 2
The surface of the wire should be smooth, and no folding, bubbles and corrosion spots, as well as scratches, abrasions, depressions and mechanical damage defects exceeding the allowable negative deviation of the point diameter are allowed.
The surface of the wire is allowed to have oil spots that have not been burned out after annealing. 4.9 Other requirements
Wires are allowed to be welded, but the diameter of the weld must be within the range of twice the allowable positive deviation of the wire diameter and the mechanical properties must be guaranteed. 5 Test methods
5.1 Chemical composition arbitration analysis method
The chemical composition arbitration analysis method of the wire should be carried out in accordance with the provisions of GB/T6987. 5.2 Room temperature longitudinal mechanical properties test method
The room temperature longitudinal mechanical properties test method of wire shall be carried out in accordance with the specifications in GB/T228. The original gauge length of the tensile specimen is 200mm. If the specimen breaks outside the mark, or breaks between the mark, but the distance between the mark and the break is less than 20mm, and the elongation obtained by the straight break is less than the provisions of this standard, the test shall be retested. 5.3 Process performance test method
The wire repeated bending test method shall be carried out in accordance with the provisions in GB/T238. 5.4 Effective resistance test method
The wire effective resistance test method shall be carried out in accordance with Appendix A. 5.5 Surface inspection method
The surface of the wire shall be inspected by visual inspection without using a magnifying instrument. 5.6 Dimension measurement method
The wire diameter shall be measured at the head, middle and tail of the wire reel using a measuring tool with an accuracy of 0.01mm. 6 Inspection rules
6.1 Inspection and acceptance
Wires shall be inspected and accepted by the supplier's technical supervision department, and the product quality shall be guaranteed to meet the requirements of this standard. 6.2 Batching
6.2.1 Wires shall be submitted for inspection in batches, and each batch shall consist of wires of the same state and diameter. 6.2.2 Wires shall be supplied in reels, and each reel shall consist of one wire. 6.2.3 The weight of the reels shall comply with the provisions of Table 6, and the weight of each reel shall not exceed 40kg. The number of reels that are less than the specified weight shall not exceed 13% (by weight) in each batch.
Table 6 Reel weight
Reel weight, kg
0.80~1.00
21. 00~ 1. 50
1.50~~2.50
Specified reel weight
Minimum reel weight of reel less than specified weight
Diameter, mm
>2.50~4.00
4. 00~5. 00
6.3 Inspection items
GB/T3195—1997
Table 6 (end)
Specified reel weight
Reel weight, kg
Minimum reel weight of reels less than the specified weight
Each batch of wires shall be inspected for chemical composition, size and allowable deviation, mechanical properties, number of repeated bends, resistance and surface quality6.4 Sampling position and quantity
The sampling position and sampling quantity of wire shall comply with the provisions of Table 7. Table 7 Sampling position and sampling quantity
Inspection items
Chemical composition
Mechanical properties
Number of repeated bending
Dimensional deviation
Surface quality
Sampling position
Any part
Any part
Sampling quantity
1 per melt
3% (number of reels) of each batch, not less than 3 reels, 1 sample per) reel
3% (number of reels) of each batch, not less than 3 reels, 1 sample per reel
3% (number of reels) of each batch, not less than 3 reels, 1 sample per reel
1 sample per reel of each batch
Note: The supplier takes melt samples for chemical composition analysis during casting, but does not take samples for analysis of wire. 6.5 Determination of test results
6.5.1 When the chemical composition is unqualified, the whole batch is judged to be unqualified. Required article number
" Inspection or test method article number
6.5.2 For the first test of mechanical properties, repeated bending times and resistance, even if only one sample fails the test result, double the number of samples should be taken from the batch of wire drums for repeated testing (it is allowed to re-take double samples from the wire drum represented by the unqualified sample). If the re-test result is qualified, the whole batch is qualified. If there is still one sample unqualified in the repeated test, the whole batch shall be scrapped or the supplier shall test each drum one by one, and the qualified ones shall be delivered.
6.5.3 When the size is unqualified, the wire drum is judged to be unqualified, but the contractor is allowed to test each drum one by one, and the qualified ones shall be delivered. 6.5.4 When the surface quality is unqualified, the wire drum is judged to be unqualified, but the contractor is allowed to cut off the unqualified part for re-testing, and the qualified ones shall be delivered. 7 Marking, packaging, transportation and storage
7.1 Marking
Each batch of wires shall be tied with a metal plate with alloy grade, specification, batch number and inspection stamp. 7.2 Packaging, transportation and storage
Wires shall not be packaged with oil. Other packaging, transportation and storage shall comply with the provisions of GB/T3199. 7.3 Quality certificate
Each batch of wires shall be accompanied by a quality certificate that meets the requirements of this standard, which shall indicate: a) Name of supplier;
b) Alloy grade;
c) Supply status;
d) Specification;
e) Batch number:
f) Net weight or number of reels;
g) Stamp of technical supervision department;
h) Mechanical properties test results;
i) Number of this standard;
ji) Packaging date.
3195--1997
3195—1997
Appendix A
(Standard Appendix)
Effective resistance test method
The resistance of the wire is measured on a sample with a length of 1m using a double bridge method with an accuracy of 10%.AT
A2 The resistance R of a wire with a length of 1m, a cross section of 1mm and a temperature of t is converted into the resistance R2s of the same wire at 20℃. The following formula is used for conversion:
R2c = R,［1 + 0.004(20 — t)Where: R20—
The resistance of the wire at 20℃;
The resistance of the wire at temperature t;
tThe temperature of the wire. wwW.bzxz.Net
A3 The temperature of the wire resistance measurement should not exceed the range of 10℃～30℃. 666
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