eFunda: Properties of Stainless Steel AISI Type 303
engineering fundamentals Stainless Steel AISI Type 303
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AISI Type 303
Category Steel
Class Stainless steel
Type Austenitic standard
Common Names Chromium-Nickel steel
Designations  France: AFNOR Z 10 CNF 18.09
Germany: DIN 1.4305
Italy: UNI x 10 CTNiS 18 09
Japan: JIS SUS 303
Sweden: SS 2346
United Kingdom: B.S. 303 S 21
United States: AMS 5640 (Type 1) , ASME SA194 , ASME SA320 , ASTM A194 , ASTM A314 , ASTM A320 , ASTM A473 , ASTM A581 , ASTM A582 , MIL SPEC MIL-S-862 , SAE 30303 , SAE J405 (30303) , UNS S30300

Composition

ElementWeight %
C  0.15 
Mn  2.00 
Si  1.00 
Cr  17.0-19.0 
Ni  8.0-10.0 
P  0.2 
S  0.15 (min) 
Mo(optional)  0.6 

Mechanical Properties

Properties Conditions 
T (°C)Treatment
Density (×1000 kg/m3) 8 25  
Poisson's Ratio 0.27-0.30 25  
Elastic Modulus (GPa) 193 25  
Tensile Strength (Mpa) 585-860 25  annealed (bar) more
Yield Strength (Mpa)  
Elongation (%)  
Reduction in Area (%)  

Thermal Properties

Properties Conditions 
T (°C)Treatment
Thermal Expansion (10-6/ºC) 17.2  0-100 more  
Thermal Conductivity (W/m-K) 16.2  100 more  
Specific Heat (J/kg-K) 500  0-100   

Electric Properties

Properties Conditions 
T (°C)Treatment
Electric Resistivity (10-9W-m) 720  25   
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