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Rulon Bearings

Medium-Silicon Iron, heat-resistant gray iron
Categories: Metal; Ferrous Metal; Cast Iron; Alloy Cast Iron

Material Notes: Ferrite matrix structure as cast.

Silal

Key Words: Heat-resistant gray iron medium-silicon iron, Silal, ferritic
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Physical PropertiesMetricEnglishComments
Density 6.81 - 7.09 g/cc0.246 - 0.256 lb/in³
 
Mechanical PropertiesMetricEnglishComments
Hardness, Brinell 170 - 250170 - 250
Tensile Strength 170 - 310 MPa24700 - 45000 psi
Compressive Strength 620 - 1040 MPa89900 - 151000 psi
Charpy Impact, Unnotched 20.0 - 31.0 J
@Diameter 30.5 mm
14.8 - 22.9 ft-lb
@Diameter 1.20 in
Test bar broken on 6 in (152 mm) supports
 
Thermal PropertiesMetricEnglishComments
CTE, linear 10.8 µm/m-°C
@Temperature 21.0 °C
6.00 µin/in-°F
@Temperature 69.8 °F
Thermal Conductivity 37.0 W/m-K257 BTU-in/hr-ft²-°F
 
Component Elements PropertiesMetricEnglishComments
Carbon, C 1.6 - 2.5 %1.6 - 2.5 %
Iron, Fe 91 %91 %
Manganese, Mn 0.40 - 0.80 %0.40 - 0.80 %
Phosphorus, P <= 0.30 %<= 0.30 %
Silicon, Si 4.0 - 7.0 %4.0 - 7.0 %
Sulfur, S <= 0.10 %<= 0.10 %
 
Descriptive Properties
Transverse Breaking Load455 to 1090 kgAs-cast 30.5 mm (1.2 in.) diameter bar; 457 mm (18 in.) span
Transverse Deflection4.6 to 8.9 mm (0.18 to 0.35 in)As-cast 30.5 mm (1.2 in.) diameter bar; 457 mm (18 in.) span

References for this datasheet.

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