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
By chemical elements AgCu 92,5
Name The value
Designation GOST Cyrillic СрМ 925
Designation GOST Latin CpM 925
Transliteration SrM 925
By 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, and their alloys В51 GOST 30649-99, GOST Р 51152-98, GOST 6836-2002, TU 117-1-813-97
Classification, nomenclature and General rules В50 GOST 6563-75
Sheets and strips В53 GOST 7221-80, GOST 24552-81
Wire from nonferrous 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 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, kg/m3
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.