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Rulon Bearings

Morgan Advanced Ceramics H-7 Technical Ceramic
Categories: Ceramic

Material Notes: General core type with an intermediate particle size distribution and open pore structure for use in Equiax castings. Generally used for difficult to leach parts as well as aluminium castings where core removal is accomplished by water blast or a knockout operation.

information provided by Morgan Advanced Materials

Key Words: Technical Ceramic
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Physical PropertiesMetricEnglishComments
Bulk Density 1.60 g/cc0.0578 lb/in³
Density 2.20 g/cc0.0795 lb/in³
Moisture Absorption 18.0 %18.0 %
Porosity 28 %28 %
 
Mechanical PropertiesMetricEnglishComments
Modulus of Rupture 0.00569 GPa0.825 ksi4-point
 
Thermal PropertiesMetricEnglishComments
CTE, linear 1.00 µm/m-°C
@Temperature 25.0 - 1000 °C
0.556 µin/in-°F
@Temperature 77.0 - 1830 °F
Shrinkage 0.40 %0.40 %mold to fired
 0.60 %0.60 %chord, mold to fired
 
Component Elements PropertiesMetricEnglishComments
Other 2.0 %2.0 %
 3.0 %3.0 %Cristobalite, after fired
 10 %10 %Cristobalite, after 15 min at 1390°C
SiO2 98 %98 %
 
Descriptive Properties
Leachability (%)10030% boiling KOH, 30g sample, 30 min.
Trace Element (ppm)<1 ppmBi
 <25 ppmPb
 <25 ppmAg
 <25 ppmSb
 <25 ppmSn
 <50 ppmZn
 <900 ppmFe

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