eFunda: Properties of Stainless Steel AISI Type 440B
engineering fundamentals Stainless Steel AISI Type 440B
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AISI Type 440B
Category Steel
Class Stainless steel
Type Martensitic standard
Common Names Chromium steel
Designations  Germany: DIN 1.4112
Japan: JIS SUS 440 B
United States: ASTM A276 , ASTM A314 , ASTM A473 , ASTM A580 , FED QQ-S-763 , MIL SPEC MIL-S-862 , SAE 51440B , SAE J405 (51440B) , UNS S44003

Composition

ElementWeight %
C  0.75-0.95 
Mn  1.00 
Si  1.00 
Cr  16.0-18.0 
P  0.04 
S  0.03 
Mo  0.75 

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) 965  25  annealed, cold finished (bar) more
Yield Strength (Mpa)  
Elongation (%)  
Reduction in Area (%)  
Hardness (HRB) 96  25  annealed (bar) more
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