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Rulon Bearings

Crucible Steel 440C Chromium Steel
Categories: Metal; Ferrous Metal; Stainless Steel; T 400 Series Stainless Steel

Material Notes: Crucible 440C is a hardenable chromium steel. It has one of the highest attainable hardnesses of the corrosion and heat resisting grades. This grade is magnetic at all times.

Information provided by Crucible Industries

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Physical PropertiesMetricEnglishComments
Density 7.64 g/cc0.276 lb/in³
 
Mechanical PropertiesMetricEnglishComments
Hardness, Brinell 230230
Hardness, Rockwell C 5959as quenched
 51
@Tempering Temp. 538 °C
51
@Tempering Temp. 1000 °F
 54
@Tempering Temp. 316 °C
54
@Tempering Temp. 600 °F
 55
@Tempering Temp. 427 °C
55
@Tempering Temp. 800 °F
 56
@Tempering Temp. 204 °C
56
@Tempering Temp. 400 °F
 59
@Tempering Temp. 100 °C
59
@Tempering Temp. 212 °F
Tensile Strength, Ultimate 758 MPa110000 psi
Tensile Strength, Yield 448 MPa65000 psi
Elongation at Break 14 %14 %in 2"
Reduction of Area 25 %25 %
Modulus of Elasticity 200 GPa29000 ksi
 
Electrical PropertiesMetricEnglishComments
Electrical Resistivity 0.0000599 ohm-cm0.0000599 ohm-cm
 
Thermal PropertiesMetricEnglishComments
CTE, linear  10.3 µm/m-°C
@Temperature 0.000 - 100 °C
5.70 µin/in-°F
@Temperature 32.0 - 212 °F
 10.8 µm/m-°C
@Temperature 0.000 - 316 °C
6.00 µin/in-°F
@Temperature 32.0 - 600 °F
Specific Heat Capacity 0.460 J/g-°C0.110 BTU/lb-°F
Thermal Conductivity 24.2 W/m-K168 BTU-in/hr-ft²-°F
Melting Point 1370 - 1480 °C2500 - 2700 °F
Solidus 1370 °C2500 °F
Liquidus 1480 °C2700 °F
 
Component Elements PropertiesMetricEnglishComments
Carbon, C 0.95 - 1.2 %0.95 - 1.2 %
Chromium, Cr 16 - 18 %16 - 18 %
Iron, Fe >= 79.1 %>= 79.1 %as balance
Manganese, Mn <= 1.0 %<= 1.0 %
Molybdenum, Mo <= 0.75 %<= 0.75 %
Phosphorus, P <= 0.40 %<= 0.40 %
Silicon, Si <= 1.0 %<= 1.0 %
Sulfur, S <= 0.030 %<= 0.030 %

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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