Alloy Ml5on

  • Alloy ML23
  • Alloy ML9
  • Alloy ML8
  • Alloy ML7-1
  • Alloy ML6
  • Alloy ML5pch
  • Alloy ML5on
  • Alloy ML5-2
  • Alloy ML5-1
  • Alloy ML5
  • Alloy ML4pch
  • Alloy ML4
  • Alloy ML3
  • Alloy ML22
  • Alloy ML21
  • Alloy ML20-1
  • Alloy ML2
  • Alloy ML19 (VML7)
  • Alloy ML18 (VML6)
  • Alloy ML17 (VML5)
  • Alloy ML15
  • Alloy ML12
  • Alloy ML11
  • Alloy ML10

    • Designation

    Name The value
    Designation GOST Cyrillic МЛ5он
    Designation GOST Latin ML5oh
    Transliteration ML5on
    By chemical elements CuЛ5он

    Description

    Alloy Ml5on used: for the manufacture of shaped castings in sand and shell mold in the mold sredneshirotnykh parts with extreme operating temperature operation to +150 °C (long-term), up to +250 °C (short-term).

    Note

    Alloy system Mg-Al-Zn.
    Alloy General purpose Ml5on has a greater total mass fraction of impurities than the ML5 and therefore less ductile and corrosion resistant.
    Aluminum and zinc increase the mechanical properties of the alloy (and the effect of aluminum effect is stronger than zinc) and manganese improves corrosion resistance. To reduce oxidation, the alloy is injected beryllium (0.002% when casting in sand molds and the mold and to 0.01% when casting under pressure).
    The alloy can strengthen its positions heat treatment — quenching and aging.
    The alloy has a broader crystallization range than alloys based on aluminum, therefore has a low castability. Due to the large interval of crystallization of the alloy is prone to hot cracks.

    Standards

    Name Code Standards
    Non-ferrous metals, including rare, and their alloys В51 GOST 2856-79
    Thermal and thermochemical treatment of metals В04 OST 1 90121-90
    Test methods. Packing. Marking В59 OST 1 90360-85

    Chemical composition

    Standard Mn Si Ni Fe Cu Al Zn Zr Mg Be
    GOST 2856-79 0.15-0.5 ≤0.35 ≤0.01 ≤0.08 ≤0.25 7.5-9 0.2-0.8 ≤0.002 Rest ≤0.002
    Mg is the basis.
    According to GOST 2856-79, the content of other impurities is ≤ 0.10%, the sum of the impurities being determined is 0.70%.

    Mechanical properties

    Section, mm sT|s0,2, MPa σU, MPa d5, %
    Casting in sand molds, shell molds and in the mold without heat treatment according to GOST 2856-79
    ≥90 ≥160 ≥2
    Casting in sand mold, shell mold and shell mold according to GOST 2856-79. Mode T4: Homogenization + annealing in air
    ≥85 ≥230 ≥5
    Casting in sand mold, shell mold and shell mold according to GOST 2856-79. T6 mode: Homogenization + annealing at air + aging
    ≥105 ≥230 ≥2

    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

    Physical characteristics

    Temperature Е, HPa r, kg/m3 С, J/(kg · °C)
    20 43 181 10467

    A description of the physical symbols

    Name Description
    Е The normal elasticity modulus
    r Density
    l Coefficient of thermal conductivity
    R UD. the resistivity

    Technological properties

    Name The value
    Features of heat treatment According to OST 1 90121-90 casting in the ground and the shell mold, shell mold, plaster mold, investment casting to reduce internal stresses recommended heat treatment regime T2 - Annealing at 350±5 °C (delay 2-3 hours), air cooling, and for casting under pressure - Annealing at 200±5 °C (exposure 1-2 h), air cooling. For a significant increase in mechanical properties of the alloy (σв, δ, an) for the 1st group of castings in the ground and the shell mold, plaster mold, investment casting, heat treatment is performed on taimu T4 - Annealing in air, 415±5 °C (aging 12-24 hours) or T6 - Tempering air from 415±5 °C (aging 12-24 h) and Aging at 175±5 °C (delay of 12-16 h), air cooling or Aging at 200±5 °C (extract 6-1 h), air cooling. Due to the low rate of diffusion processes as the cooling medium is usually a calm air. To improve the mechanical properties of the cooled castings may be conducted by blowing of air. For 2 groups of castings in the ground and the shell mold mode T4 Heat to 360±5 °C (2-4 h exposure), heated to 420±5 °C (extract 20-28 hours), quenching in air or T6 - Heat to 360±5 °C (2-4 h exposure) + Narev to 420±5 °C (extract 20-28 h), tempering in the air and Aging at 175±5 °C (delay of 12-16 h), air cooling or Aging at 200±5 °C (extract 6-1 h), air cooling. For 3 groups of castings in gravity die casting mode T4 Annealing in air, 415±5 °C (extract 8-16 h) or T6 - Tempering air from 415±5 °C (extract 8-16 h) and Aging at 175±5 °C (delay of 12-16 h), air cooling or Aging at 200±5 °C (extract 6-1 h), air cooling. For 4 groups of castings under pressure mode T4 Annealing in air, 415±5 °C (delay of 3-4 h) or T6 - Tempering air from 415±5 °C (delay of 3-4 h) + Aging at 205±5 °C (exposure 3-6 h), air cooling. For 5 groups of castings under pressure mode T4 Annealing in air, 390±5 °C (aging 6-8 hours) or T6 - Annealing in air, 39±5 °C (aging 6-8 h) + Aging at 205±5 °C (exposure 3-6 h), air cooling. During the implementation of a T6 plastic properties decrease. A noticeable increase in the values of σв, σ0,2 is achieved in the hardening of the casting by blowing air.