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Rulon Bearings

Special Metals INCOLOY® Alloy 903
Categories: Metal; Superalloy; Iron Base
Material Notes: A nickel-iron-cobalt alloy with additions of niobium, titanium, and aluminum for precipitation hardening. The alloy combines high strength with a low and constant coefficient of thermal expansion at temperatures to about 800°F (430°C). It also has a constant modulus of elasticity and is highly resistant to thermal fatigue and thermal shock. Used in gas turbines for rings and casings. Standard product forms are round, flats, forging stock, sheet, and wire.

Data provided by the manufacturer, Special Metals.
Key Words: UNS N19903; AFNOR Z3 NK 38
Vendors: Visit metalmen for your metals needs. Products include special chemistry, tight tolerances, custom tempers, odd dimensions/forms, and small quantities. Phone 1-800-767-9494.

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Physical PropertiesMetricEnglishComments
Density 8.25 g/cc0.298 lb/in³
 
Mechanical PropertiesMetricEnglishComments
Tensile Strength, Ultimate 1310 MPa190000 psiPrecipitation Hardened
Tensile Strength, Yield 1100 MPa
@Strain 0.2 %		160000 psi
@Strain 0.2 %		Precipitation Hardened
Elongation at Break 14 %14 %Precipitation Hardened
Modulus of Elasticity  146.8 GPa
@Temperature 0.000 °C		21290 ksi
@Temperature 32.0 °F
 146.9 GPa
@Temperature -50.0 °C		21310 ksi
@Temperature -58.0 °F
 146.9 GPa
@Temperature 50.0 °C		21310 ksi
@Temperature 122 °F
 147.2 GPa
@Temperature 100 °C		21350 ksi
@Temperature 212 °F
 147.4 GPa
@Temperature -100 °C		21380 ksi
@Temperature -148 °F
 147.8 GPa
@Temperature 150 °C		21440 ksi
@Temperature 302 °F
 148.4 GPa
@Temperature 200 °C		21520 ksi
@Temperature 392 °F
 148.9 GPa
@Temperature -195 °C		21600 ksi
@Temperature -319 °F
 149.3 GPa
@Temperature 250 °C		21650 ksi
@Temperature 482 °F
 149.8 GPa
@Temperature 600 °C		21730 ksi
@Temperature 1110 °F
 150.2 GPa
@Temperature 300 °C		21790 ksi
@Temperature 572 °F
 151.3 GPa
@Temperature 350 °C		21940 ksi
@Temperature 662 °F
 151.8 GPa
@Temperature 550 °C		22020 ksi
@Temperature 1020 °F
 152.4 GPa
@Temperature 400 °C		22100 ksi
@Temperature 752 °F
 153.5 GPa
@Temperature 450 °C		22260 ksi
@Temperature 842 °F
 153.9 GPa
@Temperature 500 °C		22320 ksi
@Temperature 932 °F
Poissons Ratio  0.226
@Temperature 250 °C		0.226
@Temperature 482 °F
 0.227
@Temperature 300 °C		0.227
@Temperature 572 °F
 0.231
@Temperature 200 °C		0.231
@Temperature 392 °F
 0.236
@Temperature 350 °C		0.236
@Temperature 662 °F
 0.239
@Temperature 50.0 °C		0.239
@Temperature 122 °F
 0.241
@Temperature 400 °C		0.241
@Temperature 752 °F
 0.242
@Temperature 150 °C		0.242
@Temperature 302 °F
 0.247
@Temperature 100 °C		0.247
@Temperature 212 °F
 0.273
@Temperature 450 °C		0.273
@Temperature 842 °F
 0.30
@Temperature 500 °C		0.30
@Temperature 932 °F
 0.318
@Temperature 550 °C		0.318
@Temperature 1020 °F
 0.352
@Temperature 600 °C		0.352
@Temperature 1110 °F
Shear Modulus  55.4 GPa
@Temperature 600 °C		8040 ksi
@Temperature 1110 °F
 57.6 GPa
@Temperature 550 °C		8350 ksi
@Temperature 1020 °F
 59.0 GPa
@Temperature 100 °C		8560 ksi
@Temperature 212 °F
 59.2 GPa
@Temperature 500 °C		8590 ksi
@Temperature 932 °F
 59.3 GPa
@Temperature 50.0 °C		8600 ksi
@Temperature 122 °F
 59.5 GPa
@Temperature 150 °C		8630 ksi
@Temperature 302 °F
 60.3 GPa
@Temperature 200 °C		8750 ksi
@Temperature 392 °F
 60.3 GPa
@Temperature 450 °C		8750 ksi
@Temperature 842 °F
 60.9 GPa
@Temperature 250 °C		8830 ksi
@Temperature 482 °F
 61.2 GPa
@Temperature 300 °C		8880 ksi
@Temperature 572 °F
 61.2 GPa
@Temperature 350 °C		8880 ksi
@Temperature 662 °F
 61.4 GPa
@Temperature 400 °C		8910 ksi
@Temperature 752 °F
 
Electrical PropertiesMetricEnglishComments
Electrical Resistivity 0.0000610 ohm-cm0.0000610 ohm-cm
 0.0000650 ohm-cm
@Temperature 50.0 °C		0.0000650 ohm-cm
@Temperature 122 °F
 0.0000735 ohm-cm
@Temperature 100 °C		0.0000735 ohm-cm
@Temperature 212 °F
 0.0000880 ohm-cm
@Temperature 200 °C		0.0000880 ohm-cm
@Temperature 392 °F
 0.000102 ohm-cm
@Temperature 300 °C		0.000102 ohm-cm
@Temperature 572 °F
 0.0001135 ohm-cm
@Temperature 400 °C		0.0001135 ohm-cm
@Temperature 752 °F
 0.0001195 ohm-cm
@Temperature 500 °C		0.0001195 ohm-cm
@Temperature 932 °F
 0.000122 ohm-cm
@Temperature 600 °C		0.000122 ohm-cm
@Temperature 1110 °F
Curie Temperature 415 - 470 °C779 - 878 °F
 
Thermal PropertiesMetricEnglishComments
CTE, linear 7.65 µm/m-°C
@Temperature 25.0 - 427 °C		4.25 µin/in-°F
@Temperature 77.0 - 801 °F
Specific Heat Capacity 0.435 J/g-°C0.104 BTU/lb-°Ftest temperature not reported
 0.442 J/g-°C
@Temperature 50.0 °C		0.106 BTU/lb-°F
@Temperature 122 °F
 0.454 J/g-°C
@Temperature 100 °C		0.109 BTU/lb-°F
@Temperature 212 °F
 0.482 J/g-°C
@Temperature 200 °C		0.115 BTU/lb-°F
@Temperature 392 °F
 0.507 J/g-°C
@Temperature 300 °C		0.121 BTU/lb-°F
@Temperature 572 °F
 0.532 J/g-°C
@Temperature 400 °C		0.127 BTU/lb-°F
@Temperature 752 °F
 0.559 J/g-°C
@Temperature 500 °C		0.134 BTU/lb-°F
@Temperature 932 °F
 0.584 J/g-°C
@Temperature 600 °C		0.140 BTU/lb-°F
@Temperature 1110 °F
Thermal Conductivity 16.7 W/m-K116 BTU-in/hr-ft²-°Ftest temperature unknown
 16.9 W/m-K
@Temperature 50.0 °C		117 BTU-in/hr-ft²-°F
@Temperature 122 °F
 17.2 W/m-K
@Temperature 100 °C		119 BTU-in/hr-ft²-°F
@Temperature 212 °F
 17.9 W/m-K
@Temperature 200 °C		124 BTU-in/hr-ft²-°F
@Temperature 392 °F
 18.3 W/m-K
@Temperature 300 °C		127 BTU-in/hr-ft²-°F
@Temperature 572 °F
 19.0 W/m-K
@Temperature 400 °C		132 BTU-in/hr-ft²-°F
@Temperature 752 °F
 20.3 W/m-K
@Temperature 500 °C		141 BTU-in/hr-ft²-°F
@Temperature 932 °F
 21.9 W/m-K
@Temperature 600 °C		152 BTU-in/hr-ft²-°F
@Temperature 1110 °F
Melting Point 1318 - 1393 °C2404 - 2539 °F
Solidus 1318 °C2404 °F
Liquidus 1393 °C2539 °F
 
Component Elements PropertiesMetricEnglishComments
Aluminum, Al 0.90 %0.90 %
Cobalt, Co 15 %15 %
Iron, Fe 42 %42 %
Nickel, Ni 38 %38 %
Niobium, Nb (Columbium, Cb) 3.0 %3.0 %
Titanium, Ti 1.4 %1.4 %

Some of the values displayed above may have been converted from their original units and/or rounded in order to display the information in a consistent format. Users requiring more precise data for scientific or engineering calculations can click on the property value to see the original value as well as raw conversions to equivalent units. We advise that you only use the original value or one of its raw conversions in your calculations to minimize rounding error. We also ask that you refer to MatWeb's terms of use regarding this information. Click here to view all the property values for this datasheet as they were originally entered into MatWeb.

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NINC84 / 17427

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