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AISI 8620H
Category Steel
Class Alloy steel
Type H-steel
Common Names Nickel-chromium-molybdenum steel
Designations  France: AFNOR 20 NCD 2 , AFNOR 22 NCD 2
Germany: DIN 1.6523
Italy: UNI 20 NiCrMo 2
Japan: JIS SNCM 21 , JIS SNCM 21 H
United Kingdom: B.S. 805 H 20 , B.S. 805 M 20
United States: ASTM A304 , SAE J1268 , UNS H86200


ElementWeight %
C  0.17-0.23 
Mn  0.60-0.95 
Cr  0.35-0.65 
Ni  0.35-0.75 
Mo  0.15-0.25 
P  0.035 
S  0.040 
Si  0.15-0.30 

Mechanical Properties

Properties Conditions 
T (°C)Treatment
Density (×1000 kg/m3) 7.7-8.03 25  
Poisson's Ratio 0.27-0.30 25  
Elastic Modulus (GPa) 190-210 25  
Tensile Strength (Mpa) 650  25  annealed at 870°C  more
Yield Strength (Mpa) 385 
Elongation (%) 31.3 
Reduction in Area (%) 62 
Hardness (HB) 149  25  annealed at 870°C more