GOST 19739-2015
GOST 19739−2015 Strips from silver solders. Specifications
GOST 19739−2015
INTERSTATE STANDARD
STRIPS FROM SILVER SOLDERS
Specifications
Strips from silver solders. Specifications
ISS 77.150.99
GST 18 6320
18 6420
Date of introduction 2017−01−01
Preface
Goals, basic principles and main procedure of works on interstate standardization have been established in GOST 1.0−92 «interstate standardization system. Basic provisions» and GOST 1.2−2009 «interstate standardization system. Interstate standards, rules and recommendations on interstate standardization. Rules of development, adoption, application, renewal and cancellation"
Data on standard
1 DEVELOPED by the Interstate technical Committee for standardization MTK 304 «Noble metals, alloys and industrial products», Joint-stock company «Ekaterinburg plant for processing non-ferrous metals"
2 as AMENDED by the Federal Agency for technical regulation and Metrology (Rosstandart)
3 ACCEPTED by the Interstate Council for standardization, Metrology and certification (minutes of February 27, 2015 N 75-P)
The adoption voted:
| Short name of the country on MK (ISO 3166) 004−97 | Country code, pomc (ISO 3166) 004−97 | Abbreviated name of the national authority for standardization |
| Azerbaijan | AZ |
Azstandart |
| Armenia | AM |
Ministry Of Economy Of The Republic Of Armenia |
| Belarus | BY |
Gosstandart Of The Republic Of Belarus |
| Kazakhstan | KZ |
Gosstandart Of The Republic Of Kazakhstan |
| Kyrgyzstan | KG |
Kyrgyzstandard |
| Russia | EN |
Rosstandart |
| Tajikistan | TJ |
Tajikstandart |
| Uzbekistan | UZ |
Uzstandard |
4 by Order of the Federal Agency for technical regulation and Metrology of June 3, 2016 N 518-St inter-state standard GOST 19739−2015 introduced as a national standard of the Russian Federation from 1 January 2017.
5 REPLACE GOST 19739−74
Information about the changes to this standard is published in the annual reference index «National standards», and the text changes and amendments — in monthly information index «National standards». In case of revision (replacement) or cancellation of this standard a notification will be published in the monthly information index «National standards». Relevant information, notification and lyrics are also posted in the information system of General use — on the official website of the Federal Agency for technical regulation and Metrology on the Internet
1 Scope
This standard applies to strip of silver solder, used for soldering and tinning in a variety of industries, including instrument making and jewellery manufacture.
2 Normative references
This standard uses the regulatory references to the following international standards:
GOST OIML R 76−1-2011 State system for ensuring the uniformity of measurements. Scales non-automatic actions. Part 1. Metrological and technical requirements. Test
GOST 427−75 Rulers measuring metal. Specifications
GOST 6507−90 Micrometers. Specifications
GOST 8273−75 wrapping Paper. Specifications
GOST 14192−96 Marking of cargo
GOST 15150−69 Machines, instruments and other technical products. Versions for different climatic areas. Categories, conditions of use, storage and transportation of the impact of climatic factors of the external environment
GOST 16321.1−70 Silver-copper alloys. Method for determination of silver content
GOST 16321.2−70 Alloy silver-copper. Method of spectral analysis
GOST 16882.1−71 Silver-copper-phosphorus solders. Method of determining mass percentage of silver
GOST 16882.2−71 Silver-copper-phosphorus solders. Methods for determination of mass fraction of phosphorus, lead, iron and bismuth
GOST 16883.1−71 Silver-copper-zinc solders. Method of determining mass percentage of silver
GOST 16883.2−71 Silver-copper-zinc solders. The method of determining the mass fraction of copper
GOST 16883.3−71 Silver-copper-zinc solders. Spectral method for determination of lead, iron and bismuth
GOST 19738−2015 the silver Solders. Brand
GOST 22864−83 precious metals and their alloys. General requirements for methods of analysis
_______________In the Russian Federation GOST R 52599−2006 «Precious metals and their alloys. General requirements for methods of analysis».
Note — When using this standard appropriate to test the effect of reference standards in the information system of General use — on the official website of the Federal Agency for technical regulation and Metrology on the Internet or in the annual information index «National standards» published as on January 1 of the current year, and the editions of the monthly information index «National standards» for the current year. If the reference standard is replaced (changed), when using this standard should be guided by replacing (amended) standard. If the reference standard is cancelled without replacement, then the situation in which the given link applies to the extent that does not affect this link.
3 Terms and definitions
This standard applies the following terms with respective definitions:
3.1 strip: Flat rolled product of rectangular cross section, uniform thickness of 0.10 mm or more.
3.2 dent: Local deepening of various sizes and shapes with sloping edges.
3.3 pinholes: a Defect of the surface in the form of a single blind or group of point indentations.
3.4 captivity: the Defect of the surface in the form of delamination azkabanu shape, elongated in the warp direction and United with the base metal on one side.
3.5 stratification: the surface defects in the form cracks on the edges and the ends of the sheet.
3.6 flaw on edges: the surface defects in the form of rupture of the metal at the edges of the strip.
3.7 traces of Stripping: the surface defects in the form of areas with high surface roughness formed after the Stripping of the sheet of abrasive tool.
3.8 crack: a Defect of a surface, representing a rupture of the metal.
3.9 scratch: the surface defects in the form of indentations of irregular shape and an arbitrary direction.
3.10 color tint: Defect formed on the smooth surface of the bands by forming a thin transparent surface oxide layer and light interference in it.
4 legend
The legend strips are placed according to the scheme:
Example of designation of strip made of silver solder brand the AKP 45, thickness 1.6 mm, width 100 mm, length 200 mm:
Band PSR 45 1,6х100х200 GOST 19739−2015
5 Technical requirements
5.1 Main parameters and characteristics (properties)
5.1.1 Strips from silver solders (hereinafter strip) shall conform to the requirements of this standard and be manufactured according to the technological regulations approved in the prescribed manner.
5.1.2 thickness of the strips and limit deviations for thickness shall conform to the values specified in table 1.
Table 1
In millimeters
| The width of the stripes | |
| nominal | limit deviation |
| From 0.10 to 0.15 incl. | -0,02 |
| SV. 0.15 to 0.25 incl. | -0,03 |
| SV. 0.25 to 0.40 incl. | -0,05 |
| SV. Of 0.40 to 0.80 incl. | -0,08 |
| SV. 0,80−1,60 incl. | -0,10 |
| SV. Of 1.60 to 2.50 incl. | -0,15 |
| SV. Of 2.50 to 4.00 incl. | -0,20 |
| SV. Of 4.00 to 5.00 incl. | -0,25 |
5.1.3 the Width of strips length of strips and limit deviations should conform to the values specified in table 2.
Table 2
In millimeters
| The width of the | Limit deviation of length at length | |||||
| nominal | limit deviation |
100 | 150 | 200 | 300 | 400 |
| 50 | -2,5 |
-10 | -15 | -20 | -30 | -40 |
| 100 | -5,0 | |||||
| 150; 200 | -10,0 | |||||
| Note — By agreement with consumer it is allowed manufacture of strips of different width and length, and/or other extreme deviations. | ||||||
Allowed in the party random width and length of strips: not more than 15% of the batch weight.
5.1.4 Calculation mass of a 1 cmstrips from silver solders are given in Appendix A.
5.1.5 Chemical composition of the strips should comply with the requirements of GOST 19738.
Note — By agreement with consumer it is allowed manufacture of strips of the other solders based on silver.
5.1.6 Strip manufactured in hard (unannealed) condition.
5.1.7 the surface of the strips should not be captured, cracks, delaminations, and foreign inclusions.
Allowed color of a tint, local darkening lanes, and surface damage (dents, scratches, nakoly, traces of Stripping), not deducing strip for the limit deviation on thickness.
5.1.8 Strips should be trimmed evenly and must not have flaws on the edges.
5.1.9 Physical-mechanical properties of strips are given in Appendix B
5.2 Labeling, packaging
5.2.1 At the corner of each strip labeling, comprising:
— the brand of solder;
— the batch number;
— trademark of the manufacturer.
Allowed not to perform the marking of strips with thickness less than 0.3 mm.
5.2.2 stack of strips, wrapped in paper according to GOST 8273, must be Packed in wooden or plastic boxes (containers) or padded plywood strips and Packed in cloth bags.
The free space in the box (container) is filled with soft packing material to protect the strips from mechanical damage.
Can be applied to other types of packaging and materials to ensure the safety lanes during transportation and storage.
5.2.3 On each drawer or attached to the bag tag point:
— the name of the consumer;
— the net mass, g;
— gross mass, g;
— the parcel number.
Additionally, the tag may contain other necessary information (for example, the value of the parcel, the name of the manufacturer and his address, registry, prints of the seals, the index of the storeman-packer, a stamp of technical control etc.).
Allowed transport marking under GOST 14192 with the indication of manipulation sign «Fragile. Caution."
5.2.4 gross Mass of the packing space should not exceed 15 kg.
5.2.5 Boxes (bags) sealed or sealed with seals (stamps) of the manufacturer. The seal (stamp) needs to have a clear impression.
5.2.6 Each party bands accompany a document about quality that contains:
is the trademark or name and trademark of manufacturer;
— the symbol of the band;
— the batch number;
— chemical composition;
— a lot of bands in the party, g;
— the month and year of manufacture;
— stamp of quality control.
The document as Packed in last place, which makes the note «here Document».
6 acceptance Rules
6.1 Strip take parties. The party should consist of bands with one brand of solder, one size. The weight of the batch is not limited.
6.2 Checking the surface quality and dimensions shall be subjected to not less than 25% of the bands of the party, but not less than three bands.
6.3 To check the chemical composition for compliance with 5.1.5 the consumer selects one strip from the party, manufacturer — a sample from each heat.
6.4 Upon receipt of unsatisfactory results according to the chemical composition it is carried out re-testing at twice the sample or the sample taken from the same batch. The results of repeated tests spread to the entire party.
6.5 delivery Condition is ensured by the fabrication technology.
6.6 Physico-mechanical properties of strips are given in Appendix B are for reference purposes only and are not controlled.
6.7 Control marking is subjected to each lane, checking the packaging and the gross mass of each packaging place.
7 control Methods
7.1 the thickness of the strips is measured at a distance of not less than 25 mm from the vertex of the angle and not less than 15 mm from the edge of the micrometer according to GOST 6507. The width and length of strips to measure metal ruler according to GOST 427.
Allowed the use of other measuring instruments providing the required accuracy.
7.2 Verification of the surface quality of the bands is carried out by visual inspection without the use of magnifying devices.
7.3 a Lot of bands and a lot of boxes gross define on the scales according to GOST OIML R 76−1.
7.4 Chemical composition is determined by GOST 16321.1, 16321.2 GOST, GOST 16882.1, 16882.2 GOST, GOST 16883.1, 16883.2 GOST, GOST 16883.3, GOST 22864.
Allowed to determine the chemical composition by other methods, certified in the prescribed manner and satisfies the requirements of this standard.
7.5 Marking and packaging checks visual inspection.
8 Transportation and storage
8.1 Transport, storage and accounting of strips is carried out in accordance with the order of storage, transportation and accounting of precious metals.
