FEPA Grit Size Chart for Brown Fused Alumina

Al₂O₃ Content Analysis & FEPA Standard Specifications

Chemical composition is the fundamental determinant of Brown Fused Alumina (BFA) performance in industrial applications. The precise balance of aluminum oxide (Al₂O₃) content ranging from 95.0% to 96.5%, combined with controlled levels of titanium dioxide (TiO₂), calcium oxide (CaO), silicon dioxide (SiO₂), and iron oxide (Fe₂O₃), directly influences hardness, toughness, thermal stability, and cutting efficiency across FEPA certified grain sizes F12 through F220.

What Makes BFA Ideal for Industrial Use?

  • High Al₂O₃ Purity (95-96.5%) - Superior hardness and wear resistance for demanding industrial grinding applications
  • FEPA Standard Compliance - Consistent particle size distribution and quality assurance for predictable performance
  • Controlled TiO₂ Content - Enhanced toughness and fracture resistance in high-impact grinding operations
  • Low Impurity Levels - Minimal CaO, SiO₂, and Fe₂O₃ content ensures clean cutting action without workpiece contamination
  • Thermal Stability - Maintains cutting efficiency at elevated temperatures in heavy-duty grinding applications
  • Self-Sharpening Properties - Optimized chemical composition promotes controlled grain fracture for sustained cutting performance
  • Versatile Applications - From coarse grinding (F12) to precision finishing (F220) across multiple industries
  • Cost-Effective Performance - Balanced chemistry delivers maximum productivity per unit cost in industrial operations

FEPA Certified BFA Chemical Composition by Grain Size

FEPA Grain Size Al₂O₃ (%) TiO₂ (%) CaO (%) SiO₂ (%) Fe₂O₃ (%) Industrial Applications
F12 95.2 3.0 0.3 1.2 0.3 Heavy grinding wheels, steel preparation, foundry casting cleanup, rough machining
F16 95.0 3.1 0.3 1.3 0.3 Coarse grinding applications, weld preparation, structural steel fabrication
F20 95.3 2.9 0.3 1.2 0.3 General grinding, metal fabrication, shipbuilding applications
F24 95.4 2.8 0.3 1.2 0.3 Intermediate grinding, foundry cleanup, construction equipment maintenance
F30 95.5 2.7 0.3 1.2 0.3 Medium grinding, precision machining, tool manufacturing
F36 95.6 2.6 0.3 1.2 0.3 General purpose grinding, woodworking, composite materials processing
F46 95.7 2.5 0.3 1.2 0.3 Fine grinding, surface finishing, aerospace component manufacturing
F54 95.8 2.4 0.3 1.2 0.3 Finishing operations, polishing preparation, automotive parts processing
F60 95.9 2.3 0.3 1.2 0.3 Surface preparation, paint removal, marine industry applications
F80 96.0 2.2 0.3 1.2 0.3 Fine surface finishing, automotive refinishing, precision machinery
F100 96.1 2.1 0.3 1.2 0.3 Precision finishing, electronics manufacturing, medical device production
F120 96.2 2.0 0.3 1.2 0.3 Fine polishing, precision instruments, optical component manufacturing
F150 96.3 1.9 0.3 1.2 0.3 Ultra-fine finishing, jewelry applications, watch manufacturing
F180 96.4 1.8 0.3 1.2 0.3 Mirror finishing, semiconductor processing, high-precision optics
F220 96.5 1.7 0.3 1.2 0.3 Superfinishing, lapping applications, ultra-precision manufacturing

Related Technical Resources

Complete BFA Technical Documentation

Access comprehensive technical data sheets with detailed chemical analysis, physical properties, performance specifications, quality control parameters, and application guidelines for all FEPA certified Brown Fused Alumina grades.

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