Steel R18

  • Steel R18F2K8M (EP379)
  • Steel R9F5 (EI706)
  • Steel R9M4K8-MP (DI102-MP)
  • Steel R9M4K8
  • Steel R9M4K6S (EP722)
  • R9K5 steel
  • P9 steel
  • Steel R8F2K8M5 (EP658)
  • Steel R7M2F6-MP (DI100-MP)
  • Steel R6M5F3-MP (DI99-MP)
  • R6M5F3 steel
  • Steel R6M5K5-MP (DI101-MP)
  • R6M5K5 steel
  • R6M5 steel
  • P6AM5 steel
  • P2AM9K5 steel
  • Steel R18K5F2 (EI940)
  • R18 steel
  • R14F4 steel
  • Steel R13F4K5 (EP600)
  • Steel R12F3K10M3 (EP682)
  • R12F3 steel
  • Steel R12F2K8M3 (EP657)
  • Steel R12F2K5M3 (EP863)
  • Steel R12MF5-MP (DI70-MP)
  • Steel R12M3K5F2-MP (DI103-MP)
  • Steel 9X4M3F2AGST (EK42)
  • 75KhMF steel
  • Steel 11R3AM3F2 (EP894)
  • Steel 11M5F

    • Designation

    Name The value
    Designation GOST Cyrillic Р18
    Designation GOST Latin P18
    Transliteration R18
    By chemical elements -

    Description

    Steel R18 applies: cutters, drills, mills, thread milling cutters, shaper cutters, reamers, core drills, taps, broaches for processing of structural steels with strength up to 1000 MPa, which are required to save cutting properties when heated during operation up to +600 °C.

    Note

    The steel has a reduced tendency to overheat during hardening.

    Standards

    Name Code Standards
    Bars and shapes В22 GOST 1133-71, GOST 2590-2006, GOST 2591-2006
    Sheets and strips В33 GOST 4405-75, TU 14-1-1408-75, TU 14-1-3508-82
    Bars and shapes В32 GOST 7417-75, GOST 14955-77, GOST 19265-73, TU 14-19-34-87, TU 14-11-245-88
    Steel wire medium and high carbon В72 TU 14-1-2783-79

    Chemical composition

    Standard C S P Mn Cr Si Ni Fe Cu V Mo W Co
    GOST 19265-73 0.73-0.83 ≤0.03 ≤0.03 0.2-0.5 3.8-4.4 0.2-0.5 ≤0.6 Rest ≤0.25 1-1.4 ≤1 17-18.5 ≤0.5
    Fe is the basis.

    Mechanical properties

    Section, mm t отпуска, °C sT|s0,2, MPa σU, MPa d5, % y, % HRC
    Rolled steel. Delivery condition
    - ≥510 ≥840 ≥8 ≥10 -
    Quenching in oil from 1280 °C to + Leave three-time (delayed by 1 hrs)
    - 400 - ≥1370 - - ≥61
    - 500 - ≥1470 - - ≥63
    - 550 - ≥2350 - - ≥66
    - 600 - ≥2210 - - ≥65

    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
    y The relative narrowing
    HRC Rockwell hardness (indenter diamond spheroconical)

    Physical characteristics

    Temperature Е, HPa G, HPa r, kg/m3 l, W/(m · °C) R, Mr. · m
    20 228 83 8800 - 419
    100 223 - - 26 472
    200 219 - - 27 544
    300 210 - - 28 627
    400 201 - - 29 718
    500 192 - - 28 815
    600 181 - - 27 922
    700 - - - 27 1037
    800 - - - - 1152
    900 - - - - 1173

    A description of the physical symbols

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

    Technological properties

    Name The value
    Weldability When butt welding with steel 45 and 40CR good.
    The temperature of forging Start - 1200 °C, the end of - 900 °C. Cooling in the wells at 750-800 °C.
    Sanding behaviour Increased (GOST 19265-73).
    Viscosity Good.
    Wear resistance Good.