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GB/T 39810-2021: High purity silver ingots
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| GB/T 39810-2021 | English | 119 |
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High purity silver ingots
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GB/T 39810-2021
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Basic data | Standard ID | GB/T 39810-2021 (GB/T39810-2021) | | Description (Translated English) | High purity silver ingots | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | H68 | | Word Count Estimation | 6,612 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 39810-2021: High purity silver ingots---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
High purity silver ingots
ICS 77.150.99
H68
National Standards of People's Republic of China
High purity silver ingot
Released on 2021-03-09
2021-10-01 implementation
State Administration of Market Supervision and Administration
Issued by the National Standardization Management Committee
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).
Drafting organizations of this standard. Daye Nonferrous Metals Co., Ltd., Yantai Yinuo Electronic Materials Co., Ltd., Yunnan Copper Industry Co., Ltd.
Division, Non-ferrous Metals Technology and Economic Research Institute, Henan Yuguang Gold and Lead Co., Ltd., Shandong Zhaojin Gold and Silver Refining Co., Ltd., Shandong Hengbang Smelting
Co., Ltd., Xi'an Nuoboer Rare and Precious Metal Materials Co., Ltd., Xi'an Ruixinke Metal Materials Co., Ltd.
The main drafters of this standard. Li Wei, Chen Xuewen, Lin Liang, Yan Hong, Xiang Lei, Li Lili, Zhang Mianhui, Zhang Junfeng, Zhou Longhai, Li Jin, Zhou Zhi,
Zhuang Yukai, Tu Lixin, Cheng Chunxi, Feng Guikun.
High purity silver ingot
1 Scope
This standard specifies the requirements, test methods, inspection rules, markings, packaging, transportation, storage, quality certificates, and purchase orders for high-purity silver ingots
(Or contract).
This standard is applicable to the electronic photovoltaic industry, superconducting materials, target materials, industrial-grade coatings, pharmaceuticals and other fields produced from various silver-containing raw materials.
Field of high-purity silver ingots.
2 Normative references
The following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this article
Pieces. For undated reference documents, the latest version (including all amendments) is applicable to this document.
GB/T 36590 Chemical analysis method for high purity silver. Determination of trace impurity elements. Glow discharge mass spectrometry
3 requirements
3.1 Product Classification
High-purity silver ingots are divided into three grades according to their chemical composition. IC-Ag99.9999, IC-Ag99.999, IC-Ag99.995.
3.2 Chemical composition
3.2.1 The chemical composition of high-purity silver ingots should meet the requirements of Table 1.
3.2.2 IC-Ag99.9999, IC-Ag99.999, IC-Ag99.995, the mass fraction of silver is 100% minus the measured mass fraction of impurities in Table 1
The difference between the sum of the numbers.
3.2.3 Impurities measured in high-purity silver ingots include but are not limited to the elements listed in Table 1.The buyer has special requirements for the chemical composition of high-purity silver impurities
The time can be determined through negotiation between the supplier and the buyer.
3.3 Physical specifications
3.3.1 High-purity silver ingots are rectangular ingots.
3.3.2 The dimensions and weight requirements of high-purity silver ingots are shown in Table 2.
Table 2 Size and weight requirements of pure high silver ingots
3.4 Surface quality
3.4.1 The surface of high-purity silver ingots should be smooth and clean, and there should be no obvious oxide layer. There must be no voids, interlayers, cracks, excessive shrinkage and clamping
Debris.
3.4.2 The height of the cut on the top of the 15kg high pure silver ingot shall not exceed 5mm from the end face.
3.4.3 The surface of high-purity silver ingots shall not have traces of mechanical or manual processing (except for cuts, copper brush treatment and surface marking).
4 Test method
4.1 The arbitration method for the chemical composition of high-purity silver ingots shall be conducted in accordance with GB/T 36590.
4.2 The external dimensions of high-purity silver ingots should be inspected with corresponding precision instruments.
4.3 The inspection of the unit weight of high-purity silver ingots should be carried out with a corresponding accuracy instrument, and the result is expressed as 0.1g.
4.4 The appearance quality of high-purity silver ingots shall be inspected visually.
5 Inspection rules
5.1 Inspection and acceptance
5.1.1 High-purity silver ingots shall be inspected by the supplier’s technical supervision department to ensure that the product quality meets the requirements of this standard, and the quality certificate shall be filled in.
Ming book.
5.1.2 The purchaser shall inspect the products received in accordance with the provisions of this standard. If it is deemed that the inspection results are not consistent with the provisions of this standard or the order contract,
When the time is met, it should be submitted to the supplier within 15 days from the date of receipt of the product. If arbitration is required, it shall be resolved through negotiation between the supplier and the buyer.
5.2 Batch
High-purity silver ingots should be submitted for inspection in batches. Each batch should consist of silver ingots of the same heat.
5.3 Inspection items
Each batch of high-purity silver ingots should be tested for chemical composition, physical specifications and surface quality before leaving the factory.
5.4 Sampling regulations
5.4.1 Arbitration sampling method for chemical composition of high-purity silver ingots
5.4.1.1 Each batch shall be sampled at 10% of the number of silver ingots, but not less than 1 ingot. Under special circumstances, sampling can be done block by block. The surface of the silver ingot is not
There should be foreign objects such as dust and oil.
5.4.1.2 Single ingot sampling method. draw diagonal lines on the two large faces of the ingot, and the center point is one-third and two-thirds of the top corners of the two sides.
Sampling points, a total of 8 points, as shown in Figure 1a).
5.4.1.3 Sampling method for two or more ingots. sampling points are carried out according to 4n (n is the number of ingots). Arrange the silver ingots in parallel
Shape, on the two large faces of each ingot, make the long side parallel lines, and divide the width of the ingot into 3 equal parts. Make the diagonals of the two faces, parallel and diagonal
The intersection of the lines is the sampling point. As shown in Figure 1b).
Figure 1 Sampling point
5.4.1.4 Use a drill with a diameter of 5mm~12mm to drill the sample. The drilling depth is not less than two-thirds of the thickness of the ingot. Strength of drill cuttings
After the force magnet is processed, mix well, and use the quarter method to reduce to no less than 300g. Divide into 3 parts (100g each), one part is kept by the supplier, and the other part is kept by the demander.
Save it for a copy of arbitration analysis.
5.4.2 Surface quality and physical specifications
The surface quality and physical specifications should be inspected block by block.
5.5 Judgment of test results
5.5.1 When the chemical composition determination result does not conform to this standard, the criticism is unqualified.
5.5.2 When the physical specification inspection result does not conform to this standard, the ingot shall be judged as unqualified.
5.5.3 When the surface quality inspection result does not conform to this standard, the ingot is judged as unqualified.
6 Marking, packaging, transportation, storage and quality certificate
6.1 Logo
The surface of the packaging of high-purity silver ingots should be marked with trademarks, brand numbers, batch numbers and other signs.
6.2 Packaging
The packaging method of high-purity silver ingots shall be negotiated and determined by both parties.
6.3 Transportation and storage
During transportation and storage, the product must not be damaged or contaminated.
6.4 Quality certificate
Each batch of high-purity silver ingots should be accompanied by a quality certificate, indicating.
a) The name, address, telephone and fax of the manufacturer;
b) Product name and brand number;
c) batch number;
d) Net weight and number of pieces;
e) The results of various analysis and inspections and the imprint of the technical supervision department;
f) Number of this standard;
g) Date of production.
7 Purchase order (or contract) content
The purchase order (or contract) of the materials listed in this standard shall include the following.
a) Product name;
b) grade;
c) quantity;
d) Special requirements for impurity content;
e) size requirements;
f) Packaging requirements;
g) Number of this standard;
h) Others.
1202-
T/
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