FEPA Abrasive Grade
Silicon Carbide Grit
F for Grinding Wheels, P for Sandpaper
Standardized abrasive-grade SiC in FEPA-F (bonded abrasives) and FEPA-P (coated abrasives) classifications. Self-sharpening fracture behavior, high cutting efficiency, and consistent standard compliance from 16# to 180#.
SiC Lump
Raw furnace blocks
≥50 mm
SiC Grain
Crushed coarse grains
1–5 mm
SiC Grit
FEPA-graded abrasive
0.1–1 mm
SiC Powder
Micro-powders
F8–F1500
Key Decision
F Grit or P Grit? Choose the Right Type
The most important choice when purchasing SiC grit: F grit for bonded abrasives (grinding wheels, cutting discs), P grit for coated abrasives (sandpaper, sanding belts). Different production routes create fundamentally different grain characteristics.
F Grit — Bonded Abrasives
For grinding wheels, cutting discs, vitrified/resin-bonded tools
P Grit — Coated Abrasives
For sandpaper, sanding belts, abrasive cloth, flap discs
Grit Size Chart & Application Guide
Each grit size maps to a specific application range. Coarser grits for heavy stock removal; finer grits for surface finishing.
Coarse — Heavy Stock Removal
Coarse — Heavy Stock Removal
Fine — Surface Finishing
Finer grits (F230–F1500, P240–P2500) are available as SiC Powder.
Technical Specifications
| Parameter | Specification | Why It Matters |
|---|---|---|
| Product Type | SiC Grit (Abrasive Grade) | Standardized for grinding & blasting applications |
| Grit Types | FEPA-F / FEPA-P | F = bonded abrasives; P = coated abrasives |
| Standard Sizes | 16#, 24#, 36#, 46#, 60#, 80#, 120#, 180# | Each size mapped to specific application range |
| Particle Size Range | 0.1–1.0 mm | Bridges gap between coarse grains and fine powders |
| Hardness | Mohs 9.2 | Second-hardest commercial abrasive after diamond |
| Fracture Behavior | Self-sharpening, conchoidal | New edges form under load—maintains cutting action |
| F Grit Production | Ball milling / Barmac crushing | Higher bulk density & grain strength for wheel bonding |
| P Grit Production | Controlled crushing | Sharper edges for aggressive coated abrasive cutting |
| Color Options | Black SiC / Green SiC | Black for general use; Green for precision/hard materials |
| Standard Compliance | FEPA-F, FEPA-P, JIS R6001, GB/T 2480 | Global compliance for international customers |
Two Production Routes, Two Performance Profiles
F and P grit follow fundamentally different manufacturing processes to optimize grain characteristics for their respective end-use applications.
F Grit Route
Milling → Strengthening → Classification
Outcome: Blockier grains with higher density (1.45–1.55 g/cm³) and strength—optimized for bonded abrasive products that withstand rotational loads and prolonged contact pressure.
P Grit Route
Crushing → Sharp Edge Preservation → Classification
Outcome: Angular grains with sharper edges and lower bulk density (1.30–1.40 g/cm³)—optimized for coated abrasive products where cutting aggressiveness and surface finish quality are primary performance metrics.
Primary Applications
Surface Preparation & Blast Cleaning
SiC grit delivers high cutting efficiency and consistent profile control for surface cleaning, deburring, coating preparation, paint removal, and etching across automotive, aerospace, electronics, and metal fabrication industries.
Grinding Wheels & Cutting Discs
F grit SiC is the standard abrasive grain for ceramic, resin, and vitrified bonded grinding wheels and cutting discs. Higher bulk density and grain strength ensure reliable bonding and sustained material removal under load.
Sandpaper, Belts & Abrasive Cloth
P grit SiC provides sharp cutting action and uniform surface finish for coated abrasive products—sanding belts, sandpaper sheets, abrasive cloth, and flap discs. Preferred for finishing operations on hard materials.
International Standard Compliance
FerrumX SiC grit is graded in accordance with four international abrasive standards—ensuring predictable performance across global manufacturing systems.
Bonded abrasive grit standard ISO 8486-1:1996 · F8–F220 macro, F230–F1500 micro
Coated abrasive grit standard ISO 6344-1:1999 · P12–P220 macro, P240–P2500 micro
Japanese Industrial Standard #16–#220 macro, #240–#3000 micro
China National Standard F4–F220 macro grits, W63–W3.5 micro
Why Choose FerrumX SiC Grit
Self-Sharpening Fracture
F vs P — Right Type for Right Application
FEPA / JIS / GB Compliant
Precision Size Control
Integrated Supply Chain
FAQ
Frequently Asked Questions
FEPA-F grit is produced via ball milling or Barmac crushing, resulting in higher bulk density, stronger grain structure, and blockier particle shape—ideal for bonded abrasives like grinding wheels and cutting discs. FEPA-P grit is produced through controlled crushing, retaining sharper, more angular cutting edges—preferred for coated abrasives such as sandpaper and sanding belts. F grit sizes use the ‘F’ designation (F16–F220 macro, F230–F1500 micro); P grit sizes use ‘P’ designation (P12–P220 macro, P240–P2500 micro).
FerrumX supplies standard SiC grit sizes from 16# (coarse, ~1mm particles for aggressive removal) to 180# (fine, ~0.08mm for surface finishing). Common sizes: 16#, 24#, 36# (heavy removal and sandblasting), 46#, 60#, 80# (general grinding and deburring), and 120#, 180# (surface finishing and lapping). Micro grits F230–F1500 and P240–P2500 are available as SiC powder products.
SiC grit exhibits brittle, conchoidal fracture behavior. When grinding or blasting loads exceed the fracture threshold, particles break along shell-like planes, generating new sharp cutting edges. This self-sharpening mechanism maintains aggressive material removal rates throughout service life, unlike ductile abrasive grains that dull over time.
SiC grit is extensively used in sandblasting for surface cleaning, deburring, coating preparation, and etching across industries: automotive (paint removal), aerospace (turbine blade cleaning), electronics (PCB etching), stone and glass (surface texturing), and metal fabrication (rust and weld removal). SiC’s Mohs 9.2 hardness and self-sharpening fracture produce faster, more consistent blast profiles than aluminum oxide.
F grit is manufactured using ball milling or Barmac crushing. Milling rounds grain edges and compresses internal structure, increasing bulk density (1.45–1.55 g/cm³) and grain strength—critical for bonded abrasive products under high rotational loads. P grit is produced through controlled crushing that preserves angular, sharp-edged morphology with lower bulk density but higher cutting aggressiveness—preferred for coated abrasive products.
FerrumX SiC grit complies with FEPA-F (ISO 8486-1:1996) for bonded abrasives, FEPA-P (ISO 6344-1:1999) for coated abrasives, JIS R6001 (Japanese), and GB/T 2480 (Chinese). Each grit size undergoes sieve analysis, bulk density testing, and grain shape evaluation per batch, with full traceability and COA documentation.
