20NiCrMo2-2/20NiCrMo2/DIN 1.6523 Case Hardening Steel
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.
1.Chemical Composition
| Grade | C | Si | Mn | P | S | Cr | Ni | Mo |
| 20NiCrMo2-2 (DIN1.6523) |
0.17-0.23 | ≤ 0.4 | 0.65-0.95 | ≤ 0.025 | ≤ 0.035 | 0.35-0.7 | 0.4-0.7 | 0.15-0.25 |
| 8620 | 0.18-0.23 | 0.15-0.35 | 0.7-0.9 | ≤ 0.035 | ≤ 0.04 | 0.4-0.6 | 0.4-0.7 | 0.15-0.25 |
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
