Alloy 29NK (29NK-VI)

  • Alloy 36H
  • Alloy 80HMV (80HMVX3)
  • Alloy 58H (EI792)
  • Alloy 52H (EI676; 52H-VI)
  • Alloy 48NH (EI693)
  • Alloy 47NHR
  • Alloy 47NH (EI563)
  • Alloy 47ND (47ND-VI)
  • Alloy 47H3X
  • Alloy 42NA-VI (EP333)
  • Alloy 42H (EP318; 42NA)
  • Alloy 40K27KhNM with tantalum
  • Alloy 39H
  • Alloy 38NKD (38NKD-VI)
  • Alloy 36NH (EP713)
  • Alloy 35NKT
  • Alloy 35NKG (EK53)
  • Alloy 34NKD
  • Alloy 33HX3 (EP547)
  • Alloy 33NK (33NK-VI)
  • Alloy 32NKh3 (EP546)
  • Alloy 32NKD (EI630A)
  • Alloy 32NK (EP475)
  • Alloy 31NH3G (EP545)
  • Alloy 30NKD (30NKD-VI)
  • Alloy 29NK (29NK-VI)
  • Alloy 18KhTF
  • Alloy 18KhMTF

    • Designation

    Name The value
    Designation GOST Cyrillic 29НК
    Designation GOST Latin 29HK
    Transliteration 29NK
    By chemical elements 29Ni
    Name The value
    Designation GOST Cyrillic 29НК-ВИ
    Designation GOST Latin 29HK-BI
    Transliteration 29NK-VI
    By chemical elements 29NiCo-ВIr

    Description

    Alloy 29NK used: for the manufacture of vacuum-tight junctions of items of electronic equipment with glass С49−1, C52−1, C48−1, С47−1.

    Note

    Alloy with a low CTE value.
    Alloy with a CTE (4.5 to 6.5)·10-6 deg-1 in the temperature range from minus 70 to plus 420 °C.
    Alloy 29NK-1 and 29NK-VI-1 are narrowed CTE values compared with the alloy 29NK and 29NK-VI.

    Standards

    Name Code Standards
    Classification, nomenclature and General rules В30 GOST 10994-74
    Tape В34 GOST 14080-78, TU 14-1-1286-75, TU 14-1-4346-87, TU 14-1-5088-91
    Wire, steel, alloy В73 GOST 14081-78
    Bars and shapes В32 GOST 14082-78, TU 14-11-245-88
    Blanks. Of the workpiece. Slabs В31 TU 14-1-2357-78, TU 14-1-2545-78, TU 14-1-3904-84
    Steel pipes and fittings to them В62 TU 14-3-972-80

    Chemical composition

    Standard C S P Mn Cr Si Ni Fe Cu Al Ti Co
    GOST 10994-74 ≤0.03 ≤0.015 ≤0.015 ≤0.4 ≤0.1 ≤0.3 28.5-29.5 Rest ≤0.2 ≤0.2 ≤0.1 17-18
    Fe is the basis.
    According to GOST 10994-74 in the alloy of 29NK, 29KN-VI, 29KN-1, 29KN-VI-1 grades, the deviation from the mass fraction of cobalt is ± 0.5%. The mass fraction of silicon in the alloy 29KN-VI, 29KN-VI-1 should not be more than 0.28%. For alloys of 29NK, 29NK-VI grades, the sum of impurities (carbon, chromium, copper, titanium, sulfur, phosphorus, manganese, silicon, aluminum) should not exceed 1%.

    Mechanical properties

    Section, mm σU, MPa d4
    Tape cold-rolled made of alloy 29NK brands; 29NK-VI; 29NK-VI-1; 29NK-1 according to GOST 14080-78 on delivery
    0.3-2.5 490-610 ≥23
    0.02-2.5 ≤930 -

    Description mechanical marks

    Name Description
    σU Limit short-term strength
    d4 Elongation after rupture

    Physical characteristics

    Temperature r, kg/m3 a, 10-6 1/°C
    20 8200 -
    -100 - 76
    -80 - 75
    -60 - 74
    -40 - 74
    -20 - 71
    100 - 63
    200 - 59
    300 - 52
    400 - 50
    500 - 64
    600 - 77
    700 - 90
    800 - 98

    A description of the physical symbols

    Name Description
    Е The normal elasticity modulus
    l Coefficient of thermal conductivity
    a The coefficient of linear expansion

    Technological properties

    Name The value
    Frost Tape x/K alloy 29NK (29NK-VI; 29NK-VI-1) according to GOST 14080-78 and wire cold-drawn according to GOST 14081-78 should be hardy to minus 70 °C. At the customer's request is made with cold resistance to minus 196 °C.
    The temperature of the inflection point ≥420 °C