Silicon carbide material product photography

Alumina Bonded Silicon Carbide

ALTRON™ Alumina Bonded Silicon Carbide is designed for exceptional wear and corrosion resistance at a reasonable price. It can be formed into a variety of relatively complex shapes with good tolerance control, without incurring traditional hard tooling setup charges.


  • Abrasion resistance approaches that of much more expensive, fully dense, advanced ceramics
  • Retains the outstanding thermal shock resistance of less dense refractory grade materials
  • Offers superior oxidation resistance at elevated temperatures

Key Material Properties

Composition75% SiC 
24% Al2O3 
0.9% SiO2
Apparent Porosity5-10%
Modulus of Rupture5,600 PSI (RT) 
38 MPa
Erosion Resistance 
(ASTM C704)
1.5 cc
Bulk Density170-180 lb/ft3
Thermal Conductivity 
(BTU in/hr ft2 °F)
Coefficient of Reversible 
Thermal Expansion (in/in °F)


Ceramics Win the War on Erosion

In this article, Tim Connors, Senior Market Manager-Energy & Chemicals, discusses the challenges of material selection in a typical coal-fired power plant.

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Hard Choices

In the December issue of Hydrocarbon Engineering, Tim Connors, Ted Collins and Jeffrey Bolebruch of Blasch Precision Ceramics offer insights in material selection for abrasive applications with specific reference to the use of abrasion resistant alumina bonded silicon carbide air grid nozzles.

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