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Rulon Bearings

AISI Type S21904 (Alloy 21-6-9) Stainless Steel, cold rolled sheet, 60% cold reduction
Categories: Metal; Ferrous Metal; Heat Resisting; Stainless Steel; T S20000 Series Stainless Steel
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.
Key Words: UNS S21904, AMS 5595, AMS 5656, ASME SA412, ASTM A269 (XM-11), ASTM A276 (XM-11), ASTM A314 (XM-11), ASTM A412 (XM-11), ASTM A473 (XM-11), ASTM A580 (XM-11)
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Physical PropertiesMetricEnglishComments
Density 7.83 g/cc0.283 lb/in³
 
Mechanical PropertiesMetricEnglishComments
Hardness, Brinell 400400Converted from Rockwell C hardness.
Hardness, Knoop 438438Converted from Rockwell C hardness.
Hardness, Rockwell C 4343
Hardness, Vickers 422422Converted from Rockwell C hardness.
Tensile Strength, Ultimate 1407 MPa204100 psi
 1214 MPa
@Temperature 315 °C		176100 psi
@Temperature 599 °F
 1256 MPa
@Temperature 205 °C		182200 psi
@Temperature 401 °F
 1321 MPa
@Temperature 95.0 °C		191600 psi
@Temperature 203 °F
Tensile Strength, Yield 1162 MPa
@Strain 0.2 %		168500 psi
@Strain 0.2 %
 1045 MPa
@Strain 0.2 %,
Temperature 315 °C		151600 psi
@Strain 0.2 %,
Temperature 599 °F
 1122 MPa
@Strain 0.2 %,
Temperature 205 °C		162700 psi
@Strain 0.2 %,
Temperature 401 °F
 1189 MPa
@Strain 0.2 %,
Temperature 95.0 °C		172500 psi
@Strain 0.2 %,
Temperature 203 °F
Elongation at Break 6.0 %6.0 %in 50 mm
 3.5 %
@Temperature 205 °C		3.5 %
@Temperature 401 °F		in 50 mm
 4.0 %
@Temperature 315 °C		4.0 %
@Temperature 599 °F		in 50 mm
 4.5 %
@Temperature 95.0 °C		4.5 %
@Temperature 203 °F		in 50 mm
Modulus of Elasticity 200 GPa29000 ksiTypical for stainless steel
Machinability 30 %30 %Based on 100% machinability for AISI 1212 steel.
 
Electrical PropertiesMetricEnglishComments
Electrical Resistivity 0.0000730 ohm-cm0.0000730 ohm-cm
 
Thermal PropertiesMetricEnglishComments
CTE, linear  16.7 µm/m-°C
@Temperature 25.0 - 95.0 °C		9.28 µin/in-°F
@Temperature 77.0 - 203 °F
 17.3 µm/m-°C
@Temperature 25.0 - 205 °C		9.61 µin/in-°F
@Temperature 77.0 - 401 °F		Annealed
 18.2 µm/m-°C
@Temperature 25.0 - 315 °C		10.1 µin/in-°F
@Temperature 77.0 - 599 °F		Annealed
 19.1 µm/m-°C
@Temperature 25.0 - 540 °C		10.6 µin/in-°F
@Temperature 77.0 - 1000 °F
 20.0 µm/m-°C
@Temperature 25.0 - 760 °C		11.1 µin/in-°F
@Temperature 77.0 - 1400 °F		Annealed
 20.0 µm/m-°C
@Temperature 25.0 - 870 °C		11.1 µin/in-°F
@Temperature 77.0 - 1600 °F		Annealed
 20.5 µm/m-°C
@Temperature 25.0 - 980 °C		11.4 µin/in-°F
@Temperature 77.0 - 1800 °F		Annealed
Specific Heat Capacity 0.480 J/g-°C0.115 BTU/lb-°FTypical value for stainless steel.
Thermal Conductivity  7.80 W/m-K
@Temperature -180 °C		54.1 BTU-in/hr-ft²-°F
@Temperature -292 °F
 10.9 W/m-K
@Temperature -73.0 °C		75.6 BTU-in/hr-ft²-°F
@Temperature -99.4 °F
 13.8 W/m-K
@Temperature 95.0 °C		95.8 BTU-in/hr-ft²-°F
@Temperature 203 °F
 16.1 W/m-K
@Temperature 205 °C		112 BTU-in/hr-ft²-°F
@Temperature 401 °F
 18.2 W/m-K
@Temperature 315 °C		126 BTU-in/hr-ft²-°F
@Temperature 599 °F
 20.2 W/m-K
@Temperature 425 °C		140 BTU-in/hr-ft²-°F
@Temperature 797 °F
 22.5 W/m-K
@Temperature 540 °C		156 BTU-in/hr-ft²-°F
@Temperature 1000 °F
 24.7 W/m-K
@Temperature 650 °C		171 BTU-in/hr-ft²-°F
@Temperature 1200 °F
 26.8 W/m-K
@Temperature 760 °C		186 BTU-in/hr-ft²-°F
@Temperature 1400 °F
 28.9 W/m-K
@Temperature 870 °C		201 BTU-in/hr-ft²-°F
@Temperature 1600 °F
 
Component Elements PropertiesMetricEnglishComments
Carbon, C <= 0.040 %<= 0.040 %
Chromium, Cr 20 %20 %
Iron, Fe 64 %64 %
Manganese, Mn 9.0 %9.0 %
Nickel, Ni 6.0 %6.0 %
Nitrogen, N 0.23 %0.23 %
Phosphorus, P <= 0.060 %<= 0.060 %
Silicon, Si <= 1.0 %<= 1.0 %
Sulfur, S <= 0.030 %<= 0.030 %

References for this datasheet.

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