Alloy MA21 (ИМВ2)

  • Alloy MA18
  • Alloy MA21 (IMV2)

    • Designation

    Name The value
    Designation GOST Cyrillic МА21
    Designation GOST Latin MA21
    Transliteration MA21
    By chemical elements CuAl21
    Name The value
    Designation GOST Cyrillic ИМВ2
    Designation GOST Latin IMB2
    Transliteration IMV2
    By chemical elements YВ2

    Description

    Alloy MA21 is used: for the manufacture of semi-finished products (sheets, plates, bars, rods, profiles, strips, tubes, wire, stampings and forgings) by hot deformation, as well as ingots and slabs intended for the production of sredneshirotnykh parts operating at temperatures up to +100−125 °C and cryogenic temperatures requiring high stiffness and high compressive strength.

    Standards

    Name Code Standards
    Non-ferrous metals, including rare, and their alloys В51 GOST 14957-76

    Chemical composition

    Standard Mn Si Ni Fe Cu Al Zn Ce Mg Cd Na Li K
    GOST 14957-76 ≤0.1 ≤0.1 ≤0.005 ≤0.03 ≤0.04 4.3-5.3 1-2 ≤0.15 Rest 4-5 ≤0.005 7.5-9 ≤0.005
    Mg is the basis.
    According to GOST 14957-76 the mass fraction of other impurities is ≤ 0.30%. "Other impurities" include impurities whose permissible content limits are not indicated (≤), as well as impurities not included in the table, the content of which is not determined.

    Mechanical properties

    Section, mm sT|s0,2, MPa σU, MPa d5, % y, % HB, MPa
    Rolled steel in the delivery state
    ≥190 ≥240 ≥18.5 ≥26 ≥70

    Description mechanical marks

    Name Description
    sT|s0,2 Yield strength or limit of proportionality with a tolerance for residual deformation of 0.2%
    σU Limit short-term strength
    d5 Elongation after rupture
    y The relative narrowing
    HB Brinell hardness number