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RMC 20

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Main applications

  • Gears of all types
  • Bushings and coupling pins
  • Steering and eccentric joints
  • Lathe spindles and crankshafts

Delivery status

Natural

Hardness of the supply

  • Min: -
  • Med: -
  • Max: 217 HB (recozido)
  • Composition
  • Services
  • Heat Treatments
  • Download

Standards

  • EN: 20 MnCr 5
  • DIN: 20 MnCr 5
  • W.Nr.: 1.7147
  • Supply: EN 10084

Profiles available

Thickness Tolerance
Round 100 - 280 mm EN 10060
Rectangular 10 - 70 mm EN 10058

Chemical composition (%) 1

Min Med Max
C
0,17 0,22
Si
0,40
Mn
1,10 1,40
P
0,025
S
0,035
Cr
1,00 1,30

Physical properties

Density : 7,81
10ˉ⁶m/mK
20 a 100 ⁰C 20 a 200 ⁰C 20 a 300 ⁰C 20 a 400 ⁰C 20 a 500 ⁰C 20 a 600 ⁰C 20 a 700 ⁰C
11,7 12 12,40 --- --- --- ---
Thermal Conductivity W/mk
20 ⁰C 200 ⁰C 300 ⁰C 350 ⁰C 400 ⁰C 600⁰C 700 ⁰C
42 --- --- --- --- --- ---
GPa
-100 ⁰C 0 ⁰C 20 ⁰C 100 ⁰C 200 ⁰C 300 ⁰C 400 ⁰C 500 ⁰C 600 ⁰C
--- --- 210 --- --- --- --- --- ---

Mechanical properties

Condition Ø Thickness Mechanical properties
Hardness Rm Rp0,2 ReH A Z RC
Hardened and tempered ≤ 16 - - - - - - - -
Drawn (+C) ≤ 16 - - - - - - - -
Ground (+SH) ≤ 16 - - - - - - - -
N/A ≤ 16 - - - - - - - -
Hardened and tempered ≤ 40 - - - - - - - -
Drawn (+C) ≤ 40 - - - - - - - -
Ground (+SH) ≤ 40 - - - - - - - -
N/A ≤ 40 - - - - - - - -
Hardened and tempered ≤ 100 - - - - - - - -
Drawn (+C) ≤ 100 - - - - - - - -
Ground (+SH) ≤ 100 - - - - - - - -
N/A ≤ 100 - - - - - - - -
Hardened and tempered - - - - - - - - -
Drawn (+C) - - - - - - - - -
Ground (+SH) - - - - - - - - -
N/A - - - - - - - - -
Hardened and tempered - - - - - - - - -
Drawn (+C) - - - - - - - - -
Ground (+SH) - - - - - - - - -
N/A - - - - - - - - -
Hardened and tempered - - - - - - - - -
Drawn (+C) - - - - - - - - -
Ground (+SH) - - - - - - - - -
N/A - - - - - - - - -

Notes on mechanical properties

Hardness in the Annealed condition. Values Rm (Kg/mm2), Rp0,2 (Kg/mm2) and A % (Lo=5Do) are values of the core after Heat Treatment (red 30 mm)

You can print this information
Updated on: 06.05.2022
  • Composition

    Standards

    • EN: 20 MnCr 5
    • DIN: 20 MnCr 5
    • W.Nr.: 1.7147
    • Supply: EN 10084

    Profiles available

      • Round
      • 100 - 280 mm
      • EN 10060
      • Rectangular
      • 10 - 70 mm
      • EN 10058

    Chemical composition (%) 1

    Min Med Max
    C
    0,17 0,22
    Si
    0,40
    Mn
    1,10 1,40
    P
    0,025
    S
    0,035
    Cr
    1,00 1,30

    Physical properties

    Density : 7,81
    10ˉ⁶m/mK
    20 a 100 ⁰C 11,7
    20 a 200 ⁰C 12
    20 a 300 ⁰C 12,40
    20 a 400 ⁰C ---
    20 a 500 ⁰C ---
    20 a 600 ⁰C ---
    20 a 700 ⁰C ---
    Thermal Conductivity W/mk
    20 ⁰C 42
    200 ⁰C ---
    300 ⁰C ---
    350 ⁰C ---
    400 ⁰C ---
    600⁰C ---
    700 ⁰C ---
    GPa
    -100 ⁰C ---
    0 ⁰C ---
    20 ⁰C 210
    100 ⁰C ---
    200 ⁰C ---
    300 ⁰C ---
    400 ⁰C ---
    500 ⁰C ---
    600 ⁰C ---

    Mechanical properties

    Please refer to the table in the downloads section.

    Notes on mechanical properties

    Hardness in the Annealed condition. Values Rm (Kg/mm2), Rp0,2 (Kg/mm2) and A % (Lo=5Do) are values of the core after Heat Treatment (red 30 mm)

  • Services
  • Heat Treatments
  • Download

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Hardness HB

Hardness HRC

Resistance to abrasive wear

Resistance to adhesive wear

Resistance to tempering

Resistance to heat wear

Resistance to fatigue

Compressive strength

Toughness

Ductility

Corrosion resistance

Machinability

Suitability for welding

Suitability for polishing

Thermal fatigue

Suitability for nitriding

Suitability for texture

Number of cycles (Durability)

Creep resistance

Hardenability

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