Steel 3K-7

  • 70G steel
  • Steel 60S2HFA
  • Steel 60KhFA (60KhF)
  • Steel 65
  • Steel 65G (65G1)
  • Steel 65GA
  • Steel 65S2VA
  • Steel 68A
  • Steel 68GA
  • Steel 70
  • Steel 60S2HG
  • Steel 70G2
  • Steel 70S2HA (EI142)
  • Steel 70C3A
  • 70KhGFA steel
  • Steel 75
  • Steel 80
  • Steel 85
  • KT-2 steel
  • KT-3 steel
  • Steel 55S2A
  • Steel 3K-7
  • Steel 40P
  • Steel 50RA (50P)
  • 50KhG steel
  • 50KhGA steel
  • 50KhGFA steel
  • Steel 50KhFA (50KhF)
  • 51KhFA steel
  • Steel 55C2
  • Steel 60С2Х (60С2ХА; 60С2ХАA)
  • Steel 55S2GF
  • Steel 55KhGR
  • Steel 55KhFA (55KhF)
  • 60G steel
  • Steel 60C2
  • Steel 60S2A
  • Steel 60S2G
  • Steel 60C2H2A

    • Designation

    Name The value
    Designation GOST Cyrillic 3К-7
    Designation GOST Latin 3K-7
    Transliteration 3K-7
    By chemical elements 3Co-7

    Description

    Steel 3K-7 applies: for the production of cold drawn wire used for the manufacture of springs are wound in the cold state and not subjected to hardening.

    Standards

    Name Code Standards
    Steel wire medium and high carbon В72 GOST 9389-75

    Chemical composition

    Standard C S P Mn Cr Si Ni Fe Cu
    GOST 9389-75 0.68-0.76 ≤0.03 ≤0.02 0.5-0.8 ≤0.05 0.17-0.37 ≤0.05 Rest ≤0.04
    Fe is the basis.