This standard specifies the technical requirements, test methods, inspection rules, marking and packaging of silver-plated soft round copper wire. JB/T 3135-1999 Silver-plated soft round copper wire JB/T3135-1999 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
JB/T3135
1999-08-06
Wa Xian Ji Dong
2000-01-01
JB/T3135
This standard is a revision of JB3135-82 "Silver-plated soft round copper wire". This standard replaces JB3135-82 from the date of implementation. This standard is proposed and managed by the National Wire and Cable Standardization Technical Committee. The unit of this standard is Shanghai Cable Research Institute. The main drafter of this standard is Fan Man'e.
1 Scope
Ji Jia Xin Kui Lu Wa Yi Dao
This standard specifies the technical requirements, test methods, inspection rules, marking and packaging of silver-plated soft round copper wire. JB/T31351999
JB313592
This standard applies to the conductors, braids and other electrical equipment used in the manufacture of wires and cables. It is called silver-plated copper wire. 2 Referenced standards
The following standards contain provisions. The provisions of this standard are constituted by reference in this standard. At the time of publication of the standard, the versions shown are valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest version of the following international standards. GB/T2900.10—1984 Electrical technical terminology Part 10 Wires and cables CB/T 3048—1994
GB/T3953—1983
GB/T4909—1985
YB 117—1970
Test methods for electrical properties of wires and cables
Electrical round copper wire
Test methods for bare wires
Silver classification and technical conditions
3 Symbols, codes and product representation methods
3.1 Terminology
Except as provided in this standard, all terms and definitions shall be based on those specified in GB/2900.10. 3.2 Symbols and codes
3.2.1 Base material code
Circle strikethrough
3.2.1 State code
3.2.3 Coating code
3.3 Product representation method
Silver-plated copper wire is represented by model, specification, silver content level and standard number. For example, a silver-plated copper wire with a nominal diameter of 0.23mm and a silver content of 10% is represented by:
TRY0.23E grade JH/T3135—3999
4 Model
The model of the silver-plated copper wire is: TRY.
5 Specification
The specifications and classifications of the silver-plated copper wire are shown in Table 1.
Wa Extremely Slow 1999-08-06 Tumor
2000-01-01 Small Cable
Silver Content%
Nominal Diameterm
JB/T3135
Silver Layer Thickness
6 Technical Requirements
The materials used to manufacture silver-plated copper wires shall comply with the following provisions! Round Copper Wire
62 Plating
JB/T3135
6.2.1 The silver content and plating sequence of the silver-plated copper wire shall comply with the provisions of Table 1. .2.2 The plating of the silver-plated copper wire shall be continuously and firmly attached to the surface of the copper wire. The surface of the sample after the test shall not turn black. 6.2.3 The plating surface of the silver-plated steel wire shall be smooth and continuous, and shall not have harmful defects such as silver particles, burrs, mechanical damage, etc. 6.3 The deviation of the nominal diameter of the silver-plated wire shall comply with the provisions of Table 2. Table 2
Nominal direct control
0,050~0. 100
0. 110--0. 250
0.260~0.700
0.710~1. 000
1.100~2. 000
The mechanical properties of silver-plated copper wire shall comply with the requirements of Table 3. 6.4
Nominal diameter
0. 050~0. 100
0. 110~0. 150
0.160-~0.250
0.260~0. 500
0. 510~-1. 000
1.100~2.000
Tensile strength not less than
Clock length not less than
6.5The resistivity of silver-plated copper wire should not be greater than 0.017241mmm/m at a temperature of +20℃. The temperature coefficient of resistance a is 0.003931/℃. 6. No joints are allowed for silver-plated steel wires, and the copper wires before silver plating are allowed to be welded by the usual method. 7 Test method
7.1 Determination of silver content
The determination shall be made by volumetric method or gravimetric method. The gravimetric method shall be used in arbitration. 7.1.1 Volumetric method
The method is based on the precipitation of silver ions in nitric acid solution by thiouracil, with trivalent iron as the indicator. GB/T 3953
YB 117
Take 0.25~0.5g (accurate to 0.1mg) of sample, place it in a 250ml conical beaker, add 10ml nitric acid (1.1), slowly heat until it melts, boil to drive out the brown smoke, cool, dilute to 100ml, add 5㎡l ferric ammonium sulfate (10%), and titrate with ammonium cyanate standard solution until the blue (and white precipitate) just changes to brick red (a mixture of the blue of silver ions and the red of the iron ion thiouracil complex). The consumption of ammonium thiocyanate standard solution is obtained. Silver content (%) is calculated according to the following formula:
JB/T31351999
×100%
Wherein: V is the consumption of ammonium thiocyanate standard solution, mb; T is the titer of ammonium thiocyanate standard solution for silver, g/ml; B is the sample weight, B.
7. 1. 2 Subtiter method
The method is based on the precipitation of silver as silver cyanide from nitrate solution with hydrochloric acid,) Apparatus
Ground culture filter 4#30ml
Vacuum elephant 1406 type, exhaust volume 301/min, connected with safety bottle, drying bottle, suction bottle 1000ml, b) Reagents
Nitric acid 1 1: nitric acid 1~ 99; hydrochloric acid 1 9. Step by step
Weigh 1g of sample (accurate to 0.1mg) and place it in a 100ml beaker. Add 10ml nitric acid (111) and slowly heat until dissolved. Remove all brown smoke. Cool to room temperature and dilute to 50ml. Under constant stirring, slowly add 20ml hydrochloric acid (1 1 9) and let stand for 2h. Pass through a depletion filter that has been dried at 110℃ for 2h and has reached constant weight. Remove the solution by pouring. Wash the precipitate twice with warm nitric acid (1,99). Remove the solution in the same way as above. Move the precipitate to the filter by blowing. Remove water in the same way. Then wash and filter twice with hot water. Dry the filter together with the precipitate at 110℃ for 2h to constant weight. Cool to room temperature in a desiccator and weigh to obtain the grams of silver chloride. d) Calculate
Silver content (%) Calculate according to the following formula
Where: A-
silver chloride weight, gt
sample weight, g.
7. 2 Determination of coating thickness
A×0.7526×100%
The coating thickness is calculated by measuring the silver content according to the following formula. -RGK
Wu, A-coating thickness, μm;
B-silver-plated wire radius: mmt
G——silver content.%;
K-conversion coefficient.
The conversion of coefficient K and silver content is shown in Table 4.
G%(Ag)
Inspection rules
8.1 Products shall be inspected and qualified by the technical inspection department of the manufacturer before they can be shipped. Each tray of products shipped shall be accompanied by the manufacturer's product quality inspection certificate.
8.2 Silver-plated copper wire shall be inspected according to the provisions of Table 5. 8.3 During random inspection, 1% of each batch shall be sampled, but not less than 3 plates. For larger batches, no more than 10 plates (circles). If the first test fails, double the number of samples shall be taken for a second test. If there are still unqualified results, the sample shall be inspected again. 4
Packaging and marking
Item name
Silver content and coating thickness
Diameter and deviation
External question!
Coating continuity
Mechanical properties
ResistivityWww.bzxZ.net
JB/T3135
Standard document number
Inspection regulations
Test methods
7. 1 and 7 2
GB/T 4909.2
Positive belt day force inspection
GR/T 4909.9
GB/T 4909. 3
GB/T 3048. 3
9.1 Silver-plated steel wire is supplied in coils or cabinets and should be properly wrapped with paper or film and stored in a dry place without corrosive gas. The coiled silver-plated copper wire should be evenly wound on the bobbin, the wire ends must be fixed, and the outermost layer should be kept at an appropriate distance from the edge of the coil side plate. .2 Each coil or each circle of silver-plated copper wire should be accompanied by a label indicating: a) manufacturer name,
b) model:
e) specification: mm, grade:
d) pen weight and net weight, kgl
e) manufacturing date: year, month:
") This standard number, JB/T 3135-1999. Parrot cheek
JB/T3135
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