Martensitic stainless steel X20Cr13, 1.4021, AISI 420 corrosion-resistant according to EN 10088-1.

 

Standard Steel Grade
Chemical Composition %
C: Mn: Si: P: S: Cr: Ni: Cu:
PN 2H13
0.16 - 0.25 <0.8 <0.8 <0.04 <0.03 12.0 - 14.0 <0.6 <0.3
EN X20Cr13 - 1.4021
0.16 - 0.25 <1.5 <1.0 <0.04 <0.03 12.0 - 14.0 - -
AF Z20C13
0.18 - 0.23 <1.0 <1.0 <0.04 0.015 - 0.030 12.0 - 14.0 - -
ASTM AISI 420 - UNS S42000
>0.15 <1.0 <1.0 <0.04 <0.03 12.0 - 14.0 - -
PN 2H14
0.16 - 0.25 <0.8 <0.8 <0.04 <0.03 >13.0 <0.6 -
BS 420S29 - 420 S 29
0.14 - 0.20 <1.0 <0.8 <0.04 <0.03 11.5 - 13.5 <1.0 -
GOST 20Х13
0.16 - 0.25 <0.8 <0.8 <0.03 <0.025 12.0 - 14.0 <0.6 <0.3

 

X20Cr13, 1.4021, AISI 420 - specification and application

Martensitic stainless steel intended for thermal improvement, showing high mechanical properties - strength, ductility and machinability, while maintaining sufficient corrosion resistance. 2H13 does not show resistance to chlorine, salts and intergranular corrosion. X20Cr13 is a suitable grade for work in steam environments, in low concentrations of inorganic acids, diluents, clean water and steam at a suitably treated surface.

Steel X20Cr13 and 2H13 can also be classified as a heat-resistant grade up to 825 degrees. Shows resistance to gases containing sulphur compounds and a hot steam. Stable and appropriately high mechanical properties are maintained in the operating temperature range 475 - 500. Above the early-mentioned temperature, the creep limit is negligible, only the time resistance is relatively high.

The grade is used for the production of bolts at elevated temperatures, turbine blades, knives, decoration, surgical instruments, bushings, valve seats, scrapers, blades, ramparts, checks, springs, machine parts, moulds for casting under pressure, and the pins exposed to light loads in the automotive, petrochemical, industrial hydraulics and energy industries.


X20Cr13, 1.4021, AISI 420 - mechanical properties

Properties for bars

 

  • Annealed softened delivery condition +A
    • Tensile strength for peeled bars, Rm: <760 MPa
    • Hardness for peeled bars, HB: <230
    • Tensile strength for peeled bars, Rm: <910 MPa
    • The hardness for drawn bars, HB: <290
  • Heat-treated condition +QT700
    • Properties for peeled bars
      • Tensile strength, Rm: 700 - 850 MPa
      • The yield point, Rp0,2: >500 MPa
      • Elongation, A:> 13%
      • Impact resistance, KV: > 25J
    • Properties for drawn bars
      • Tensile strength, Rm: 700 - 1000 MPa
      • The yield point, Rp0,2: >500 MPa
      • Elongation, A:> 8%
      • Impact resistance, KV: > 25J
  • Heat-treated condition +QT800
    • Tensile strength, Rm: 800 - 950 MPa
    • The yield point, Rp0,2: >600 MPa
    • Elongation, A:> 12%
    • Impact resistance, KV: > 20J
  • Thermal capacity, cp = 460 J * kg-1 * K-1
  • Modulus of elasticity, E = 215 GPa
  • Thermal conductivity, λ = 30 W * m-1 * K-1
  • Specific resistance, Ω: 0.60 mkOhm * m
  • Linear expansion coefficient, α: 10.5 * 10-6 K-1

 

Mechanical properties for sheets

 

  • Annealed delivery condition +A
    • Tensile strength, Rm: <700 MPa
    • Elongation, A:> 15%
    • Hardness, HB/HV: <225
    • Hardness, HRB: <95
  • Heat-treated condition +QT650
    • Tensile strength, Rm: 650 - 850 MPa
    • The yield point, Rp0,2: >450 MPa
    • Elongation, A:> 12%
  • Heat-treated condition +QT750
    • Tensile strength, Rm: 750 - 950 MPa
    • The yield point, Rp0,2: >550 MPa
    • Elongation, A:> 10%
  • Hardness in HRC improved condition: 44-50
  • Hardness in HV improved condition: 440 - 530

 

The mechanical properties of cold-rolled strips

 

  • Delivery condition +A - Tensile strength, Rm: 500 - 700 MPa
  • Delivery condition +C700 - Tensile strength, Rm: 700 - 850 MPa
  • Delivery condition +C800 - Tensile strength, Rm: 850 - 1000 MPa

 


Heat and plastic treatment of X20Cr13, 1.4021

  • Annealing at a temperature of 745 - 825 ℃ with cooling in air
  • Delivery condition +QT650 - Hardening in 950 - 1010℃ with cooling in oil or air, tempering at 700 - 780℃
  • Delivery condition +QT700 - Hardening in 950 - 1050℃ with cooling in oil or air, tempering at 650 - 750℃
  • Delivery condition +QT750 - Hardening in 950 - 1010℃ with cooling in oil or air, tempering at 620 - 700℃
  • Delivery condition +QT800 - Hardening in 950 - 1050℃ with cooling in oil or air, tempering at 600 - 700℃
  • Rolling and forging at a temperature of 1100 - 800 ℃

 


In the above mentioned grades the company provides:

 


Other indications of grades and substitutes:

2H13, X20Cr13, X 20 Cr 13, 1.4021, AISI 420, UNS S42000, Z20C13, Z 20 C 13, 2H14, 420S29, 420 S 29, 20Х13, 20Ch13, 20Kh13


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