Alloy 40KKHNM (ЭИ995)

  • Alloy 40KHNM (EI995)
  • Alloy 97NL (EI996)
  • Alloy 95NLM (EI996M)
  • Alloy 95NLVF (EI996V)
  • Alloy 68NKHVKTU (EP578)
  • Alloy 46NKhT (EP619)
  • Alloy 45NHT (EP218)
  • Alloy 44NCTU
  • Alloy 42NKhTUA (H41KhTA)
  • Alloy 42NKHTU (42NKHTUA)
  • Alloy 40KHMVTU
  • Alloy 36KhNTU (EI702)
  • Alloy 36NKhTYu8M (EP52)
  • Alloy 36NKhTU5M (EP51)
  • Alloy 36NKhTU (EI702)
  • Alloy 21NKMT (VES-130)
  • Alloy 17KhNGT (EI814)
  • Alloy 12KhNKMTU (SP22)

    • Designation

    Name The value
    Designation GOST Cyrillic 40КХНМ
    Designation GOST Latin 40KXHM
    Transliteration 40KHNM
    By chemical elements 40CoCrNiCu
    Name The value
    Designation GOST Cyrillic ЭИ995
    Designation GOST Latin EI995
    Transliteration EhI995
    By chemical elements -

    Description

    Alloy 40KKHNM used: for the production of elastic and provocatively elements; springs clockworks twisted cylindrical springs operating at temperatures to +400 °C, the cores of electrical appliances; cold-rolled strip thickness 0,10−2,0 mm and cold rolled wire with diameter 0.1−6.0 mm, intended for the manufacture of connecting elements (brackets for suturing blood vessels, frames, artificial heart valves) cardiovascular and other implantable items used in surgery (brackets for overlapping mechanical joints on organs and tissues, implants, etc.).

    Note

    Alloy with a temporary resistance wire 2450- 2650 MN/m2 (250−270 kgf/mm2), with the normal elasticity modulus 196000 MN/m2 (20000 kgf/mm2), non-magnetic corrosion resistant in aggressive environments and in tropical climates, the strain-hardening.

    Standards

    Name Code Standards
    Classification, nomenclature and General rules В30 GOST 10994-74
    Tape В34 GOST 14117-85
    Wire, steel, alloy В73 GOST 14118-85, GOST Р 51397-99, TU 14-1-1285-75, TU 14-1-899-74
    Bars and shapes В32 GOST 31625-2012, TU 14-11-245-88

    Chemical composition

    Standard C S P Mn Cr Si Ni Fe Mo Co
    GOST Р 51397-99 ≤0.15 ≤0.015 ≤0.015 1-2.5 18.5-21.5 ≤1 14-18 Rest 6.5-8 39-42
    GOST 10994-74 0.07-0.12 ≤0.02 ≤0.02 1.8-2.2 19-21 ≤0.5 15-17 Rest 6.4-7.4 39-41
    Co is the basis.
    In accordance with GOST R 51397-99, minor deviations in the mass fraction of the elements indicated in the table are allowed in agreement with the health authorities, without entailing changes in the structure and mechanical properties.

    Mechanical properties

    Section, mm sT|s0,2, MPa σU, MPa d
    Cold-rolled steel strip as supplied by GOST 14117-85
    0.1-2 - ≥1670 -
    0.1-2 - 1370-1770 -
    0.1-2 - 1080-1470 ≥1
    Cold-rolled steel strip as supplied by GOST 14117-85. Aging at 450-550 °C (delay of 2-4 h), air cooling
    - 1760-2350 1960-2650 1-3
    - 1470-1760 1670-1900 3-5
    - 1180-1470 1370-1670 5-8
    Cold-rolled steel strip and cold drawn wire for medical purposes according to GOST R 51397-99. The treatment chosen by the manufacturer to achieve desired properties
    - ≥1300 ≥1450 ≥8
    - ≥450 ≥950 ≥65
    Wire cold drawn vysokokachestvennoj in the state of delivery according to GOST 14118-85. Aging at 350-450 °C (delay of 2-4 h), air cooling
    0.1-0.5 - ≥2160 -
    0.53-1 - ≥2060 -
    Wire cold drawn nagarebana in the state of delivery according to GOST 14118-85. Aging at 400-500 °C (delay of 2-4 h), air cooling
    ≥1 - ≥1570 -
    0.1-0.5 - ≥1810 -
    0.53-1 - ≥1720 -
    Wire cold drawn polonikova in the state of delivery according to GOST 14118-85. Aging at 450-550 °C (delay of 2-4 h), air cooling
    ≥1 - ≥1270 -
    0.1-0.5 - ≥1470 -
    0.53-1 - ≥1370 -

    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
    d Elongation after rupture