AISI Type S21904 (Alloy 2169) Stainless Steel, annealed sheet and strip, tested at 315°C (600°F)
Subcategory: Ferrous Metal; Heat Resisting; Metal; Stainless Steel; T S20000 Series Stainless Steel
Close Analogs: AISI Type S21900
Key Words: UNS S21904, AMS 5595, AMS 5656, ASME SA412, ASTM A269 (XM11), ASTM A276 (XM11), ASTM A314 (XM11), ASTM A412 (XM11), ASTM A473 (XM11), ASTM A580 (XM11)
Component  Wt. %    C  Max 0.04   Cr  20   Fe  64  
 Component  Wt. %    Mn  9   N  0.23   Ni  6  
 Component  Wt. %    P  Max 0.06   S  Max 0.03   Si  Max 1  

Material Notes: Austenitic, high strength, excellent corrosion resistance, and low magnetic permeability. Applications include aircraft applications such as ducting and bellows systems, tail pipes and exhaust systems, clamps, fasteners, flanges, and hydraulic tubing.
Physical Properties  Metric  English  Comments 

Density  7.83 g/cc  0.283 lb/in³  
Mechanical Properties 

Tensile Strength, Ultimate  594 MPa  86200 psi  
Tensile Strength, Yield  259 MPa  37600 psi  at 0.2% offset 
Elongation at Break  33 %  33 %  in 50 mm. Broke on gage mark. 
Modulus of Elasticity  200 GPa  29000 ksi  Typical for stainless steel 
Machinability  30 %  30 %  Based on 100% machinability for AISI 1212 steel. 
Electrical Properties 

Electrical Resistivity  7.3e005 ohmcm  7.3e005 ohmcm  
Thermal Properties 

CTE, linear 20°C  16.7 µm/m°C  9.28 µin/in°F  at 2595°C, 17.3 µm/m°C at 25205°C. Annealed 
CTE, linear 250°C  18.2 µm/m°C  10.1 µin/in°F  at 25315°C. Annealed 
CTE, linear 500°C  19.1 µm/m°C  10.6 µin/in°F  at 25540°C, 20.0 µm/m°C at 25760°C, 20.0 µm/m°C at 25870°C, 20.5 µm/m°C at 25980°C. Annealed 
Specific Heat Capacity  0.48 J/g°C  0.115 BTU/lb°F  Typical value for stainless steel. 
Thermal Conductivity  13.8 W/mK  95.8 BTUin/hrft²°F  13.8 at 95°C, 7.8 W/m°C at 180°C, 10.9 W/m°C at 73°C, 16.1 W/m°C at 205°C, 18.2 W/m°C at 315°C, 20.2 W/m°C at 425°C, 22.5 W/m°C at 540°C, 24.7 W/m°C at 650°C, 26.8 W/m°C at 760°C, 28.9 W/m°C at 870°C 
References for this datasheet.
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