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Rulon Bearings

Crucible Steel Nitriding #135 Modified Steel, AISI 4140 Modified
Categories: Metal; Ferrous Metal; Alloy Steel; AISI 4000 Series Steel
Material Notes: Nitriding #135 steel is a modification of AISI 4140 specifically designed to be nitrided for high surface hardness and abrasion resistance.

Information provided by Crucible Industries
Key Words: AISI 4140 Modified
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Physical PropertiesMetricEnglishComments
Density 7.75 g/cc0.280 lb/in³
 
Mechanical PropertiesMetricEnglishComments
Hardness, Rockwell C 28 - 3028 - 30
Hardness, Rockwell HR30N 8686at surface
 62
@Thickness 0.508 mm		62
@Thickness 0.0200 in
 70
@Thickness 0.381 mm		70
@Thickness 0.0150 in
 82
@Thickness 0.254 mm		82
@Thickness 0.0100 in
 84
@Thickness 0.203 mm		84
@Thickness 0.00800 in
 86
@Thickness 0.127 mm		86
@Thickness 0.00500 in
 87
@Thickness 0.0762 mm		87
@Thickness 0.00300 in
Hardness, Vickers 11101110at surface
 420
@Thickness 0.508 mm		420
@Thickness 0.0200 in
 600
@Thickness 0.381 mm		600
@Thickness 0.0150 in
 950
@Thickness 0.254 mm		950
@Thickness 0.0100 in
 1040
@Thickness 0.203 mm		1040
@Thickness 0.00800 in
 1120
@Thickness 0.127 mm		1120
@Thickness 0.00500 in
 1140
@Thickness 0.0762 mm		1140
@Thickness 0.00300 in
Modulus of Elasticity 207 GPa30000 ksi
 
Thermal PropertiesMetricEnglishComments
CTE, linear  12.6 µm/m-°C
@Temperature 21.1 - 121 °C		7.00 µin/in-°F
@Temperature 70.0 - 250 °F
 12.8 µm/m-°C
@Temperature 21.1 - 204 °C		7.10 µin/in-°F
@Temperature 70.0 - 400 °F
 13.0 µm/m-°C
@Temperature 21.1 - 427 °C		7.25 µin/in-°F
@Temperature 70.0 - 800 °F
Thermal Conductivity 41.5 W/m-K
@Temperature 93.3 °C		288 BTU-in/hr-ft²-°F
@Temperature 200 °F
 
Component Elements PropertiesMetricEnglishComments
Aluminum, Al 1.15 %1.15 %
Carbon, C 0.40 %0.40 %
Chromium, Cr 1.6 %1.6 %
Iron, Fe 95.6 %95.6 %as balance
Manganese, Mn 0.60 %0.60 %
Molybdenum, Mo 0.35 %0.35 %
Silicon, Si 0.30 %0.30 %

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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NCRUC919 / 160370

Aluminum Castings




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