eFunda: Properties of Stainless Steel AISI Type 409
engineering fundamentals Stainless Steel AISI Type 409
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AISI Type 409
Category Steel
Class Stainless steel
Type Ferritic standard
Common Names Chromium steel
Designations  Germany: DIN 1.4512
Japan: JIS SUH 409
United Kingdom: B.S. 409 S 17
United States: ASME SA268 , ASTM A176 , ASTM A268 , ASTM A651 , SAE 51409 , SAE J405 (51409) , UNS S40900

Composition

ElementWeight %
C  0.08 
Mn  1.00 
Si  1.00 
Cr  10.5-11.75 
P  0.045 
S  0.045 
Ti  0.48-0.75 

Mechanical Properties

Properties Conditions 
T (°C)Treatment
Density (×1000 kg/m3) 7.8 25  
Poisson's Ratio 0.27-0.30 25  
Elastic Modulus (GPa) 190-210 25  
Tensile Strength (Mpa) 450  25  annealed (plate, sheet, strip) more
Yield Strength (Mpa) 240 
Elongation (%) 25 
Reduction in Area (%)  
Hardness (HRB) 80 (max)  25  annealed (bar) more

Thermal Properties

Properties Conditions 
T (°C)Treatment
Thermal Expansion (10-6/ºC) 11.7  0-100  
Thermal Conductivity (W/m-K) 24.9  95 more  
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