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Rulon Bearings

AISI Grade 18Ni (350) Maraging Steel solution annealed at 815°C (1500°F) for 1 hour, air cooled, aged at 480°C (900°F) for 6 hours
Categories: Metal; Ferrous Metal; Alloy Steel; Low Alloy Steel; Carbon Steel; Low Carbon Steel; Maraging Steel
Material Notes: Applications: rocket motor cases, load cells, flexures for guidance mechanisms of missiles, helicopter drive shafts, aircraft wing components, aluminum die casting dies, cores, pins, plastic molding dies, trim knees, cold forming dies and springs.
Key Words: UNS K93120
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Physical PropertiesMetricEnglishComments
Density 8.08 g/cc0.292 lb/in³
 
Mechanical PropertiesMetricEnglishComments
Tensile Strength, Ultimate  1611 MPa
@Temperature 538 °C		233700 psi
@Temperature 1000 °F
 1864 MPa
@Temperature 482 °C		270400 psi
@Temperature 900 °F
 1988 MPa
@Temperature 427 °C		288300 psi
@Temperature 800 °F
 2139 MPa
@Temperature 316 °C		310200 psi
@Temperature 600 °F
Tensile Strength, Yield  1460 MPa
@Strain 0.2 %,
Temperature 538 °C		212000 psi
@Strain 0.2 %,
Temperature 1000 °F
 1737 MPa
@Strain 0.2 %,
Temperature 482 °C		251900 psi
@Strain 0.2 %,
Temperature 900 °F
 1912 MPa
@Strain 0.2 %,
Temperature 427 °C		277300 psi
@Strain 0.2 %,
Temperature 800 °F
 2037 MPa
@Strain 0.2 %,
Temperature 316 °C		295400 psi
@Strain 0.2 %,
Temperature 600 °F
Elongation at Break  12.3 %
@Temperature 316 °C		12.3 %
@Temperature 600 °F		in gage length of 4.5 times the square root of the area
 15.6 %
@Temperature 427 °C		15.6 %
@Temperature 800 °F		in gage length of 4.5 times the square root of the area
 17.4 %
@Temperature 482 °C		17.4 %
@Temperature 900 °F		in gage length of 4.5 times the square root of the area
 20 %
@Temperature 538 °C		20 %
@Temperature 1000 °F		in gage length of 4.5 times the square root of the area
Reduction of Area  54.9 %
@Temperature 316 °C		54.9 %
@Temperature 600 °F
 57.6 %
@Temperature 427 °C		57.6 %
@Temperature 800 °F
 60.3 %
@Temperature 482 °C		60.3 %
@Temperature 900 °F
 70.9 %
@Temperature 538 °C		70.9 %
@Temperature 1000 °F
Modulus of Elasticity 200 GPa29000 ksi
Bulk Modulus 160 GPa23200 ksiTypical for steel.
Poissons Ratio 0.300.30Calculated
Shear Modulus 77.0 GPa11200 ksiEstimated from elastic modulus
 
Electrical PropertiesMetricEnglishComments
Electrical Resistivity 0.0000174 ohm-cm0.0000174 ohm-cmTypical steel
 
Thermal PropertiesMetricEnglishComments
CTE, linear 11.3 µm/m-°C
@Temperature 21.0 - 480 °C		6.28 µin/in-°F
@Temperature 69.8 - 896 °F
Thermal Conductivity  25.3 W/m-K
@Temperature 20.0 °C		176 BTU-in/hr-ft²-°F
@Temperature 68.0 °F
 25.8 W/m-K
@Temperature 50.0 °C		179 BTU-in/hr-ft²-°F
@Temperature 122 °F
 27.0 W/m-K
@Temperature 100 °C		187 BTU-in/hr-ft²-°F
@Temperature 212 °F
 
Component Elements PropertiesMetricEnglishComments
Aluminum, Al 0.10 %0.10 %
Boron, B 0.0030 %0.0030 %
Carbon, C <= 0.030 %<= 0.030 %
Cobalt, Co 12 %12 %
Iron, Fe 63 %63 %As remainder
Manganese, Mn <= 0.10 %<= 0.10 %
Molybdenum, Mo 4.8 %4.8 %
Nickel, Ni 18.5 %18.5 %
Phosphorus, P <= 0.010 %<= 0.010 %
Silicon, Si <= 0.10 %<= 0.10 %
Sulfur, S <= 0.010 %<= 0.010 %
Titanium, Ti 1.4 %1.4 %
Zirconium, Zr 0.010 %0.010 %

References for this datasheet.

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