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AISI 420 (1.4021)

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Description

Martensitic stainless steel with good mechanical strength. It can reach the hardness of 50 HRC when treated by quenching and hardening. Its welding requires some care.

Main applications

  • Surgical instruments
  • shafts for pumps and turbines
  • Steam valves
  • Moulds for glass and moulds for plastic

Delivery status

Treated

Hardness of the supply

  • Min: -
  • Med: -
  • Max: -
  • Composition
  • Services
  • Heat Treatments
  • Download

Profiles available

Thickness Tolerance
Round 6 - 200 mm EN 10060

Chemical composition (%) 1

Min Med Max
C
0,16 0,25
Si
1,00
Mn
1,50
P
0,040
S
0,015
Cr
12,00 14,00

Physical properties

Density : 7,70
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
10,5 11 11,50 12,00 --- --- ---
Thermal Conductivity W/mk
20 ⁰C 200 ⁰C 300 ⁰C 350 ⁰C 400 ⁰C 600⁰C 700 ⁰C
30,00 --- --- --- --- --- ---
GPa
-100 ⁰C 0 ⁰C 20 ⁰C 100 ⁰C 200 ⁰C 300 ⁰C 400 ⁰C 500 ⁰C 600 ⁰C
--- --- 215 212 205 200 190 --- ---

Mechanical properties

Condition Ø Thickness Mechanical properties
Hardness Rm Rp0,2 ReH A Z RC
Hardened and tempered ≤ 10 - - - - - - -
Drawn (+C) ≤ 10 - - - - - - -
Ground (+SH) ≤ 10 - - - - - - -
N/A ≤ 10 - - - - - - -
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 ≤ 63 - - - - - - -
Drawn (+C) ≤ 63 - - - - - - -
Ground (+SH) ≤ 63 - - - - - - -
N/A ≤ 63 - - - - - - -
Hardened and tempered - - - - - - - - -
Drawn (+C) - - - - - - - - -
Ground (+SH) - - - - - - - - -
N/A - - - - - - - - -
Hardened and tempered - - - - - - - - -
Drawn (+C) - - - - - - - - -
Ground (+SH) - - - - - - - - -
N/A - - - - - - - - -

Notes on mechanical properties

Rp0

You can print this information
Updated on: 06.05.2022
  • Composition

    Profiles available

      • Round
      • 6 - 200 mm
      • EN 10060

    Chemical composition (%) 1

    Min Med Max
    C
    0,16 0,25
    Si
    1,00
    Mn
    1,50
    P
    0,040
    S
    0,015
    Cr
    12,00 14,00

    Physical properties

    Density : 7,70
    10ˉ⁶m/mK
    20 a 100 ⁰C 10,5
    20 a 200 ⁰C 11
    20 a 300 ⁰C 11,50
    20 a 400 ⁰C 12,00
    20 a 500 ⁰C ---
    20 a 600 ⁰C ---
    20 a 700 ⁰C ---
    Thermal Conductivity W/mk
    20 ⁰C 30,00
    200 ⁰C ---
    300 ⁰C ---
    350 ⁰C ---
    400 ⁰C ---
    600⁰C ---
    700 ⁰C ---
    GPa
    -100 ⁰C ---
    0 ⁰C ---
    20 ⁰C 215
    100 ⁰C 212
    200 ⁰C 205
    300 ⁰C 200
    400 ⁰C 190
    500 ⁰C ---
    600 ⁰C ---

    Mechanical properties

    Please refer to the table in the downloads section.

    Notes on mechanical properties

    Rp0

  • 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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