Steel 55KH20G9AN4 (ЭП303)

  • Steel 10Х11Н20Т2Р (ЭИ696А)
  • 10X23H10 steel
  • Steel 10Х23Н18 (0Х23Н18)
  • Steel 12Х25Н16Г7АР (ЭИ835)
  • Steel 20X23H18 (EI417)
  • Steel 40Х10С2М (ЭИ107)
  • Steel 40Х9С2 (4Х9С2)
  • Steel 45Х22Н4М3 (EP48)
  • Steel 55Kh20G9AN4 (EP303)

    • Designation

    Name The value
    Designation GOST Cyrillic 55Х20Г9АН4
    Designation GOST Latin 55X20G9AH4
    Transliteration 55H20G9AN4
    By chemical elements 55Cr20Mn9NН4
    Name The value
    Designation GOST Cyrillic ЭП303
    Designation GOST Latin EP303
    Transliteration EhP303
    By chemical elements -

    Description

    55KH20G9AN4 steel is used: for the manufacture of valves of automobile engines.

    Note

    Heat-resistant steel and heat resistant austenitic class.
    The recommended maximum operating temperature for a very long time +600 °C.
    The temperature of beginning of intensive scaling in air +750 °C.

    Standards

    Name Code Standards
    Classification, nomenclature and General rules В30 GOST 5632-72
    Blanks. Of the workpiece. Slabs В31 OST 3-1686-90
    Bars and shapes В32 TU 14-1-1049-74, TU 14-1-2115-77, TU 14-1-3241-81, TU 14-11-245-88

    Chemical composition

    Standard C S P Mn Cr Si Ni Fe Cu N Ti Mo
    GOST 5632-72 0.5-0.6 ≤0.03 ≤0.04 8-10 20-22 ≤0.45 3.5-4.5 Rest ≤0.3 0.3-0.6 ≤0.2 ≤0.3
    Fe is the basis.