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AISI Type 446
Category Steel
Class Stainless steel
Type Ferritic standard
Common Names Chromium steel
Designations  United States: ASME SA268 , ASTM A176 , ASTM A268 , ASTM A276 , ASTM A314 , ASTM A473 , ASTM A511 , ASTM A580 , FED QQ-S-763 , FED QQ-S-766 , MIL SPEC MIL-S-862 , SAE J405 (51446) , UNS S44600

Composition
ElementWeight %
C  0.20 
Mn  1.50 
Si  1.00 
Cr  23.0-27.0 
P  0.04 
S  0.03 
N  0.25 

Mechanical Properties
Properties Conditions 
T (°C)Treatment
Density (×1000 kg/m3) 7.5 25  
Poisson's Ratio 0.27-0.30 25  
Elastic Modulus (GPa) 200 25  
Tensile Strength (Mpa) 480  25  annealed, hot finished (wire) more
Yield Strength (Mpa) 275 
Elongation (%) 20 
Reduction in Area (%) 45 
Hardness (HRB) 95 (max)  25  annealed (plate, sheet, strip) 

Thermal Properties
Properties Conditions 
T (°C)Treatment
Thermal Expansion (10-6/ºC) 10.4  0-100 more  
Thermal Conductivity (W/m-K) 20.9  100 more  
Specific Heat (J/kg-K) 500  0-100   

Electric Properties
Properties Conditions 
T (°C)Treatment
Electric Resistivity (10-9W-m) 670  25   
Glossary