Boron Carbide Powders

GNPGraystar’s Boron Carbide Powders are supplied across a full range of FEPA macrogrit and microgrit sizes, giving fabricators a consistent, high-purity material for grinding, polishing, refractory, and other industrial applications. Since boron carbide is the third-hardest material, it is stable in demanding operations.

Standard grit sizes are available off the shelf, with custom sizing and packaging available on request.

  •     High Hardness (Mohs ≈ 9.3)
  •     Abrasion / Wear-Resistance
  •     Fracture Toughness
  •     Chemical Inertness
  •     Consistent, FEPA-Graded Particle Size Distribution
  •     High Neutron Absorbing Cross Section
  •     Lapping & Polishing
  •     Wire Saw Slicing (sapphire, silicon, and other hard substrates)
  •     Loose Abrasive Blasting Media
  •     Ultrasonic Machining
  •     Refractory Additive
  •     Feedstock for Sintering & Hot-Pressing

Related Products

Nuclear Grade Boron Carbide

Sinter Grade Boron Carbide

Hot-Press Grade Boron Carbide

Frequently Asked Questions

Standard offerings run from FEPA F220 through F1500 micro grits, plus coarser macro sizes (-200F, -325F) and micron cuts (12, 25, and 45 µm). Custom sizing is available on request.

This general-purpose powder line is graded for abrasive performance across standard FEPA sizes. The Nuclear, Sinter, and Hot-Pressed grades are engineered formulations, controlled boron content for neutron absorption, or ultra-fine sub-10-micron particle sizing for ceramic sintering and hot pressing.

Yes. Boron carbide is a standard abrasive for wire-saw slicing of sapphire and similar hard substrates, typically in the F360–F400 grit range.

Yes, custom particle size distributions and packaging (drums, bags, or bulk) are available on request in addition to standard grit sizes.

Typical abrasive-grade boron carbide runs approximately 96% B4C minimum with total boron of approximately 76.5% minimum. Confirm the current specification sheet for the exact lot/grade you’re ordering, since purity can be tuned to the application.