Alloy 92,5 SRM (SRM 925)
Designation
| Name |
The value |
| Designation GOST Cyrillic |
СрМ 92,5 |
| Designation GOST Latin |
CpM 92,5 |
| Transliteration |
SrM 925 |
| The chemical elements |
AgCu 92,5 |
| Name |
The value |
| Designation GOST Cyrillic |
СрМ 925 |
| Designation GOST Latin |
CpM 925 |
| Transliteration |
SrM 925 |
| The chemical elements |
AgCu 925 |
Description
Alloy 92,5 SRM is used: to manufacture and discontinuous sliding contacts, electrical conductors and other products for industrial purposes; items of tableware (spoons, forks, knives, coasters, dishes, blades, shovels, cups, glasses, sugar bowls, tea strainer); ritual and ceremonial items (wedding rings, crosses); jewellery for personal adornment (rings, rings, medallions, pendants, brooches, chains, bracelets, pins, cufflinks); cigarette cases and cigarette holders; commemorative medals and badges.
Note
Alloy silver-copper. With the increase of copper content in the alloy increases its hardness, but alloy becomes yellowish. The oxygen in the alloy increases the hardness and fragility.
Standards
| Name |
Code |
Standards |
| Non-ferrous metals, including rare metals, and their alloys |
В51 |
GOST 30649-99, GOST Р 51152-98, GOST 6836-2002, TU 117-1-813-97 |
| Classification, nomenclature and general norms |
В50 |
GOST 6563-75 |
| Sheets and stripes |
В53 |
GOST 7221-80, GOST 24552-81 |
| Wire of non-ferrous metals and their alloys |
В74 |
TU 48-1-263-90, TU 48-1-350-85 |
Chemical composition
| Standard |
Fe |
Cu |
Sb |
Pb |
Bi |
O |
Ag |
| GOST 30649-99 |
≤0.1 |
The rest |
≤0.002 |
≤0.004 |
≤0.002 |
≤0.01 |
92.5-93 |
| GOST 6836-2002 |
≤0.1 |
7.2-7.8 |
≤0.002 |
≤0.004 |
≤0.002 |
- |
92.2-92.8 |
Ag is the basis.
According to GOST 6836-2002, the copper content is the rest (in the table the calculated content is indicated). The total content of impurities should be ≤ 0.110%.
According to GOST 30649-99 the chemical composition is given for the jewelry alloy YUSRM 92.5 (YUSPR 925). The sum of the normalized impurities is ≤ 0.120%.
Physical characteristics
| Temperature |
r, кг/м3 |
| 20 |
10360 |
A description of the physical symbols
| Name |
Description |
| r |
Density |
Technological properties
| Name |
The value |
| Pressure treatment |
The alloy is suitable for all types of cold treatment. |
| Features of heat treatment |
To improve the ductility of SRM 925 alloy recommended annealing in water. To increase the hardness of this alloy by heating. |
| Casting |
The alloy is suitable for all kinds of casting. |
