eFunda: Properties of Stainless Steel AISI Type 304HN
engineering fundamentals Stainless Steel AISI Type 304HN
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AISI Type 304HN
Category Steel
Class Stainless steel
Type Austenitic nonstandard
Common Names Chromium-Nickel steel
Designations  United States: ASME SA240 (XM-21) , ASTM A240 , ASTM A240 (XM-21) , ASTM A276 (XM-21) , SAE 30304HN , UNS S30452

Composition

ElementWeight %
C  0.04-0.10 
Mn  2.00 
Si  1.00 
Cr  18.0-20.0 
Ni  8.0-10.5 
P  0.045 
S  0.03 
N  0.10-0.16 

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) 620  25  annealed (plate) more
Yield Strength (Mpa) 345 
Elongation (%) 30 
Reduction in Area (%) 50 
Hardness (HRB) 100 (max)  25  annealed (sheet, strip) more
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