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20Cb-3TM
Category Steel
Class Stainless steel
Type Austenitic nonstandard
Designations United States: UNS N08020, ASTM B473, ASTM B463

Composition
ElementWeight %
C  0.07 
Mn  2.00 
Si  1.00 
Cr  19.0-21.0 
Ni  32.0-38.0 
P  0.045 
S  0.035 
Mo  2.0-3.0 
Cu  3.0-4.0 
Nb  0.56 (min) 

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) 585  25  cold finished and annealed (bar) more
Yield Strength (Mpa) 240 
Elongation (%) 15 
Reduction in Area (%) 50 
Hardness (HRB) 95 (max)  25  annealed (plate, sheet, strip) 
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