Alloy Is 87.5 CPM (CPM 875)

  • Alloy SrM 96 (SrM 960)
  • Alloy SSZP-2
  • Alloy SSZP-1
  • Alloy SSZM-2
  • Alloy SSZM-1
  • Alloy SrPl 96-4 (SrPl-4)
  • Alloy SrPl 88-12 (SrPl-12)
  • Alloy SrPdM 50-30 (SrPdM-30-20)
  • Alloy SrPd 80-20 (SrPd-20)
  • Alloy SrPd 70-30 (SrPd-30)
  • Alloy SrPd 60-40 (SrPd-40)
  • Alloy SrM 97 (SrM 970)
  • Alloy SrM 95 (SrM 950)
  • Alloy SrM 94 (SrM 940)
  • Alloy SrM 92.5 (SrM 925)
  • Alloy SrM 91.6 (SrM 916)
  • Alloy SrM 90 (SrM 900)
  • Alloy SrM 87.5 (SrM 875)
  • Alloy SrM 83 (SrM 830)
  • Alloy SrM 80 (SrM 800)
  • Alloy SrM 77 (SrM 770)
  • Alloy SrM 75 (SrM 750)
  • Alloy SrM 50 (SrM 500)

    • Designation

    Name The value
    Designation GOST Cyrillic СрМ 87,5
    Designation GOST Latin CpM 87,5
    Transliteration SrM 875
    By chemical elements AgCu 87,5
    Name The value
    Designation GOST Cyrillic СрМ 875
    Designation GOST Latin CpM 875
    Transliteration SrM 875
    By chemical elements AgCu 875

    Description

    Alloy is 87.5 CPM applies: for production of 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
    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

    Chemical composition

    Standard Fe Cu Sb Pb Bi O Ag
    GOST 30649-99 ≤0.1 Rest ≤0.002 ≤0.004 ≤0.002 ≤0.01 87.5-88
    GOST 6836-2002 ≤0.1 12.2-12.8 ≤0.002 ≤0.004 ≤0.002 - 87.2-87.8
    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 87.5 (USPR 875). The sum of the normalized impurities is ≤ 0.120%.

    Physical characteristics

    Temperature r, kg/m3
    20 10280

    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.
    Casting The alloy is suitable for all kinds of casting.