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29-4-2
Category Steel
Class Stainless steel
Type Ferritic nonstandard
Designations United States: UNS S44800, ASTM A176

Composition
ElementWeight %
C  0.01 
Mn  0.30 
Si  0.20 
Cr  28.0-30.0 
Ni  2.0-2.5 
P  0.025 
S  0.02 
Mo  3.5-4.2 

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) 550  25  annealed (bar, plate, sheet, strip) 
Yield Strength (Mpa) 415 
Elongation (%) 20 
Reduction in Area (%)  
Hardness (HRB) 98 (max)  25  annealed (bar, plate, sheet, strip) 
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