20NiCrMo2-2 Case Hardening Steel |20NiCrMo2

20NiCrMo2-2/DIN 1.6523 Case Hardening steel manufacturers and suppliers, supplied in round rods,square/flat bars,rollers,shafts,blocks and forging pieces.

20NiCrMo2-2 is defined as low Ni-Cr-Mo alloy steel as per EN10084 standard.It has good weldability,toughness,and machinability,but low in corrosion resistance.20NiCrMo2-2 is suitable for parts which require high hardness and good wear resistance after nitriding.This material is generally supplied in annealed  condition with hardness  below 212HB.

20NiCrM02-2 forged round bar

1.Chemical Composition

GradeCSiMnPSCrNiMo
20NiCrMo2-2
(DIN1.6523)
0.17-0.23≤ 0.40.65-0.95≤ 0.025≤ 0.0350.35-0.70.4-0.70.15-0.25
86200.18-0.230.15-0.350.7-0.9≤ 0.035≤ 0.040.4-0.60.4-0.70.15-0.25

2.Related Specifications

ASTM:8620
BS:805M20
JIS:SNCM220
GB:20CrNiMo

3.Heat Treatment & Mechanical Property

  • Normalizing:  880 – 920°C,Cooling in air
  • Annealing:650 – 700°C,Cooling in furnace
  • Carburizing:880 – 980°C
  • Core Hardening:860 – 900°C,oil/water
  • Case Hardening:780-820°C,oil/water
  • Tempering:150 – 200°C,Cooling in air

20NiCrMo2-2 Normalizing Diagram

20NiCrMo2-2 Normalizing Diagram

20NiCrMo2-2 Annealing Diagram

20NiCrMo2-2 Annealing Diagram

20NiCrMo2-2 Mechanical Property -Normalizing(+N) Vs Annealing(+A)

Tensile,MpaYield,MpaElongation,%Reduction,%Charpy Impact, JBrinell Hardness,HB
+NMin 635Min 355Min 26.3Min 60Min 100183
+AMin 535Min 385Min 31.3Min 62Min 112149

20NiCrMo2-2 Hardenability Limits

Distance from quenched end mm1.53.05.07.09.01113152025303540

20NiCrMo2-2+H
Min413731252220-------
Max49484542363331302725242423

20NiCrMo2-2+HH
Min4441363127242221-----
Max49484542363331302725242423

20NiCrMo2-2+HL
Min413731252220-------
Max464440363129272623212020-

 4.Supply Form & Size

  • Round Bars:  Dia.80 – 1,000mm as Forged
  • Flat / Square Bars:  Thickness Max.800mm
  • Shafts, Rollers, Blocks:  Customized or According to Drawing
  • Rolled Round Bars:  Dia.16 – 130mm with UT Assurance

Heat treatment:Quenched and Tempered (+QT), Normalizing (+N), Annealing (+A)
Surface finish:Black / Rough turned / Peeled