This standard specifies the requirements, test methods, inspection rules, marking, transportation, storage and quality certificate of gold ingots. This standard applies to gold ingots produced from various gold-containing raw materials. This product is mainly used in electrical, electronic, jewelry, decoration and other industries. GB/T 4134-2003 Gold Ingot GB/T4134-2003 Standard Download Decompression Password: www.bzxz.net

GB/T 4134—2003
This standard is modified to adopt ASTMB562—1995 "Refined Gold". This standard is a revision of the national standard GB/T4134—1994 "Gold Ingot". Compared with the standard GB/T4134-1994 "Gold Ingot", this standard has made the following modifications: IC-Au99.995 and IC-Au99.5 are added on the basis of the original three grades, and Au99.9 is deleted. Requirements for the content of eight impurity elements, namely Pd, Si, Mg, As, Sn, Cr, Ni, and Mn, are added. The specifications of gold ingots adopt the general requirements of the international market. This standard will replace GB/T4134—1994 from the date of implementation. This standard is proposed by the China Nonferrous Metals Industry Association. This standard is under the jurisdiction of the National Technical Committee for Standardization of Nonferrous Metals. The responsible drafting units of this standard are: Jiangxi Copper Company, Inner Mongolia Qiankun Gold and Silver Refining Co., Ltd., Great Wall Gold and Silver Refining Plant, Zhuzhou Smelting Group Co., Ltd.
Participating drafting units of this standard are: Tongling Nonferrous Metals Group Co., Ltd., Daye Nonferrous Metals Company, Yunnan Copper Company, Baiyin Nonferrous Metals Company.
Main drafters of this standard are: Li Baodi, Song Wenda, Wu Yiwei, Wang Zisen, Wang Qing, Li Dunhua, Yi Fu, Yao Taiping. This standard is entrusted to the National Technical Committee for Standardization of Nonferrous Metals for interpretation. The previous versions of the standards replaced by this standard are: —GB/T 4134—1994;
—GB/T4134—1984.
GB/T 4134--2003
This standard specifies the requirements, test methods, inspection rules, marking, packaging, transportation, storage and quality certificates for gold ingots. This standard is applicable to gold ingots produced from various gold-containing raw materials. This product is mainly used in electrical, electronic, jewelry, decoration and other industries. 2 Normative references
The clauses in the following documents become the clauses of this standard through reference in this standard. For all referenced documents with dates, all subsequent amendments (excluding errata) or revisions are not applicable to this standard. However, parties who reach an agreement based on this standard are encouraged to study whether the latest versions of these documents can be used. For all referenced documents without dates, the latest versions are applicable to this standard. GB/T8170—1987 Rules for rounding off values
GB/T1250 Methods for expressing and determining limit values ​​GB/T11066 Methods for chemical analysis of gold
3 Requirements
3.1 Product classification
Gold ingots are divided into four grades according to their chemical composition: IC-Au99.995, IC-Au99.99, IC-Au99.95, and IC-Au99.5. 3.2 Chemical composition
3.2.1 The chemical composition of gold ingots shall comply with the provisions of Table 1. Table 1
Chemical composition (mass fraction)/%
IC-Au99.995
IC-Au99.99
IC-Au99. 95
IC-Au99.5
IC-Au99.995
IC-Au99.99
IC-Au99. 95
IC-Au99. 5
Not less than
Not less than
Impurity content not more than
Chemical composition (mass fraction)/%
Impurity content not more than
3.2.2 The gold content (mass fraction) of IC-Au99.995, 1C-Au99.99, and IC-Au99.95 is obtained by deducting the sum of the actual measured values ​​of impurities specified in the table from 100%. The gold content of IC-Au99.5 is directly measured. 3.2.3 If the buyer has special requirements for the chemical composition of the gold ingot, it can be determined by negotiation between the supply and demand parties. 3.3 Physical specifications
3.3.1 The shape of the gold ingot is rectangular trapezoid or rectangular parallelepiped. 1
GB/T4134—2003
3.3.2 Weight of each gold ingot: 1kg, 3kg, 12.5kg or other specifications. 3.3.3 Weight of gold ingot shall be rounded to 0.1g in accordance with GB/T8170. 3.3.4 The supplier and buyer may negotiate to produce gold ingots of other specifications. 3.4 Surface quality
3.4.1 The surface of the gold ingot shall be flat and clean, with complete edges and corners, and no flash or burrs. 3.4.2 The gold ingot shall not have cavities, interlayers, cracks, excessive shrinkage and inclusions. 3.4.3 No traces of other mechanical processing other than casting cuts are allowed. 4 Test method
4.4.1 The arbitration analysis method of the chemical composition of the gold ingot shall be carried out in accordance with GB/T11066. 4.4.2 The surface quality of the gold ingot shall be visually inspected. 5 Inspection rules
5.1 Inspection and acceptance
5.1.1 Gold ingots shall be inspected by the supplier's quality supervision department to ensure that the product quality complies with the provisions of this standard and fill in the quality certificate. 5.1.2 The buyer shall inspect the received products in accordance with the provisions of this standard. If the inspection results do not comply with the provisions of this standard or the contract, the buyer shall submit the matter to the supplier within 30 days from the date of receipt of the product, and the supplier and buyer shall negotiate to resolve the issue. If arbitration is required, arbitration sampling shall be conducted jointly by the supplier and the buyer at the buyer's side.
5.2 Batching
Gold ingots shall be submitted for inspection in batches, and each batch shall consist of gold ingots of the same brand or the same furnace. 5.3 Inspection items
5.3.1 Chemical composition shall be inspected in batches.
5.3.2 Surface quality and physical specifications shall be inspected piece by piece. 5.4 Arbitration sampling method
5.4.1 Gold ingot sampling 20% ​​of the number of gold ingots in each batch shall be randomly sampled, but not less than 1 ingot. In special cases, sampling can be done piece by piece. 5.4.2 Single ingot sampling method: Draw diagonal lines on the two large faces of the ingot, and take the sampling point at half the distance from the center point to the top angle, with a total of four points. As shown in Figure 1.
5.4.3 Multi-ingot sampling method: The sampling points of two or more gold ingots follow the 2n (n is the number of ingots) rule. Arrange the gold ingots into a rectangle, draw a parallel to the center line of the rectangle on the two large faces of each gold ingot, and then draw diagonal lines of the two faces. The intersection of the parallel lines and the diagonal lines of the rectangle is the sampling point. As shown in Figure 2.
A—Sampling point on the casting surface;
B—Sampling point on the bottom surface.
Figure 1 Schematic diagram of sampling points
A—Sampling point on the casting surface;
B-Sampling point on the bottom surface.
Figure 2 Schematic diagram of sampling points
5.4.4 Use a 5mm~~8mm drill bit to drill the gold ingot. The drilling depth should not be less than two-thirds of the ingot thickness. The drilled sample should be treated with a magnet and then mixed. Use the quartering method to reduce it to the required sample volume. ?
GB/T 4134—2003
5.4.5 The sample of IC-Au99.995, IC-Au99.99, and IC-Au99.95 should not be less than 30g each, and the sample of IC-Au99.5 should not be less than 10g each.
5.4.6 To avoid surface contamination of the sample, soak it in (1+1) hot hydrochloric acid for 15min before analyzing the sample. Rinse it with water, rinse it with alcohol or acetone twice, and dry it in an oven at 105℃~110℃. 5.5 Determination of test results
5.5.1 The rounding off of the values ​​of the chemical composition test results shall be carried out in accordance with the provisions of Chapter 3 of GB/T8170. The rounded off values ​​shall be determined in accordance with the provisions of GB/T1250.
5.5.2 If the surface quality test results do not conform to Article 3.4 of this standard, the ingot shall be judged as unqualified. 5.5.3 If the chemical composition does not conform to Article 3.2 of this standard, the ingot shall be judged as unqualified. 6 Marking, packaging, transportation, storage and quality certificate 6.1 Marking
The year, batch number, weight, trademark and brand name shall be cast or printed on the surface of each gold ingot. 6.2 Packaging
25 pieces of 1kg gold ingots are packed in one box, 10 pieces of 3kg gold ingots are packed in one box, and 2 pieces of 12.5kg gold ingots are packed in one box. Each gold ingot shall be wrapped with clean paper or plastic film and packed in wooden boxes or plastic boxes. Other packaging methods can also be used after consultation between the supply and demand 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 gold ingots shall be accompanied by a quality certificate, indicating: a) Enterprise name, address, telephone number, fax; b)
Product name and brand;
Batch number;
Net weight and number of pieces;
Results of various analysis and inspections and the stamp of the quality supervision department; This standard number;
Date of manufacture (or packaging date).
7 Contents of Order Form (or Contract)
Order forms (or contracts) for materials listed in this standard shall include the following contents: a)
Product name;
b) Brand;
Quantity,
Special requirements for impurity content;
Requirements for ingot shape and size;wwW.bzxz.Net
Packing requirements;
This standard number;
h) Others.
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