eFunda: Properties of Alloy Steel AISI Type 303Se
engineering fundamentals Alloy Steel AISI Type 303Se
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AISI Type 303Se
Category Steel
Class Stainless steel
Type Austenitic standard
Common Names Chromium-Nickel steel
Designations  United States: AMS 5640 (Type 2) , AMS 5641 , AMS 5738 , ASME SA194 , ASME SA320 , ASTM A194 , ASTM A194 (grade 8F) , ASTM A314 , ASTM A320 , ASTM A473 , ASTM A581 , ASTM A582 , MIL SPEC MIL-S-862 , SAE 30303Se , SAE J405 (30303Se) , UNS S30323

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  0.06 
Se  0.15 (min) 

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) 193 25  
Tensile Strength (Mpa) 620  25  annealed  more
Yield Strength (Mpa) 240 
Elongation (%) 50 
Reduction in Area (%) 55 
Hardness (HB) 160  25  annealed more

Thermal Properties

Properties Conditions 
T (°C)Treatment
Thermal Expansion (10-6/ºC) 17.3  0-100 more  
Thermal Conductivity (W/m-K) 16.3  100 more  
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