eFunda: Properties of Stainless Steel AISI Type 348
engineering fundamentals Stainless Steel AISI Type 348
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AISI Type 348
Category Steel
Class Stainless steel
Type Austenitic standard
Common Names Chromium-Nickel steel
Designations  Germany: DIN 1.4546
United Kingdom: B.S. 2 S 130 , B.S. 347 S 17 , B.S. 347 S 18 , B.S. 347 S 40 , B.S. S. 525 , B.S. S. 527
United States: ASME SA182 , ASME SA213 , ASME SA240 , ASME SA249 , ASME SA312 , ASME SA358 , ASME SA376 , ASME SA403 , ASME SA409 , ASME SA479 , ASTM A167 , ASTM A182 , ASTM A213 , ASTM A240 , ASTM A249 , ASTM A269 , ASTM A276 , ASTM A312 , ASTM A314 , ASTM A358 , ASTM A376 , ASTM A403 , ASTM A479 , ASTM A580 , ASTM A632 , FED QQ-S-766 , MIL SPEC MIL-S-23195 , MIL SPEC MIL-S-23196 , SAE 30348 , SAE J405 (30348) , UNS S34800

Composition

ElementWeight %
C  0.08 
Mn  2.00 
Si  1.00 
Cr  17.0-19.0 
Ni  9.0-13.0 
P  0.045 
S  0.03 
Cu  0.2 
Nb  0.7 
Ta  0.1 

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) 515  25  hot finished and annealed (wire) more
Yield Strength (Mpa) 205 
Elongation (%) 40 
Reduction in Area (%) 50 
Hardness (HRB) 88 (max)  25  annealed (plate, sheet, strip) 

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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