Molybdenum MCH

  • Molybdenum M-5
  • Molybdenum M-6
  • M99.9-MP molybdenum
  • M99.95-MP molybdenum
  • Molybdenum MK
  • Molybdenum MRN
  • Molybdenum MS
  • Molybdenum MF
  • Molybdenum PMVP
  • Molybdenum MCC

    • Designation

    Name The value
    Designation GOST Cyrillic МЧ
    Designation GOST Latin MCh
    Transliteration MCh
    By chemical elements CuЧ

    Description

    Molybdenum MCH is used: for the production of annealed strips intended for the manufacture of parts of vacuum devices by deep drawing; the wire diameter is from 20 to 1000 microns, obtained by powder metallurgy and used for the manufacture of meshes and parts for various applications in electronic products.

    Note

    Without molybdenum additives.

    Standards

    Name Code Standards
    Sheets and strips В53 GOST 25442-82
    Wire from nonferrous metals and their alloys В74 OST 11 021.004-76
    Bars В55 TU 48-19-247-87, TU 48-19-247-93

    Chemical composition

    Standard C Si Ni Fe Al Mo Ca Mg
    GOST 25442-82 ≤0.005 ≤0.014 ≤0.005 ≤0.014 ≤0.004 Rest ≤0.003 ≤0.002
    OST 11 021.004-76 - - - - - ≥99.96 - -
    Mo is the basis.
    According to GOST 25442-82 the chemical composition is given for molybdenum of MCH grade. It is permissible to increase the mass proportions of impurities of aluminum, iron, calcium, and magnesium, while retaining the sums of the mass fractions of aluminum + iron, calcium + magnesium.
    According to OST 11 021.004-76 the chemical composition is given for molybdenum of MCH grade. The total mass fraction of impurities should not be more than 0.040%. The amount of impurities includes the following elements: calcium, magnesium, silicon, nickel, iron, aluminum, if they are not additives.

    Mechanical properties

    Section, mm σU, MPa d
    Strip rolled heat-treated (annealed) in the delivery state according to GOST 25442-82 (in parentheses are the values for control samples)
    0.1 ≥784 ≥5 (2)
    0.15 ≥784 ≥5 (2)
    0.2 ≥686 ≥6 (3)
    0.3 ≥686 ≥7 (4)
    Wire as supplied at OST 11 021.004-76. In the column cross-section specified the wire diameter in µm
    20-100 ≥1432 ≥2
    100-400 ≥1000 ≥2
    400-600 ≥883 ≥3
    600-1000 ≥785 ≥3
    20-100 ≥716 ≥2
    100-400 ≥608 ≥2
    400-600 ≥587 ≥3
    600-1000 ≥490 ≥3

    Description mechanical marks

    Name Description
    σU Limit short-term strength
    d Elongation after rupture

    Technological properties

    Name The value
    Particularities of production of goods For OST 11 021.004-76 wire micron size range comes in the following six groups: A. Wire having on a surface layer of the technological lubricant; B. Wire, free from technological lubricant by electrochemical etching method; B. Wire, annealed to the required mechanical properties, Wire, purified by the method of electrochemical etching and annealed to the required mechanical properties; D. Wire, annealed to the required mechanical properties. Compared to the wire group has higher strength and less elongation; E. Wire, purified by the method of electrochemical etching and annealed to the required mechanical properties. Compared with the wire of the group G has a higher coefficient "K" and a smaller elongation.