Why This Question Troubles Many Buyers?
For overseas buyers in the lapping, polishing, and precision finishing industries, choosing between Green Silicon Carbide F600 and F800 is not as simple as comparing particle size.
Procurement teams often struggle because:
- Both grits are used for fine finishing, but performance differs significantly
- PSD (particle size distribution) varies widely between suppliers
- Micro‑powder agglomeration affects lapping uniformity
- Impurities cause scratches or color defects
- Different milling technologies lead to different grain shapes
- Many suppliers cannot provide stable batch‑to‑batch consistency
This makes the decision technical, application‑specific, and highly dependent on supplier capability.
What Are Green Silicon Carbide F600 and F800?
Green Silicon Carbide (SiC) is a high‑purity, high‑hardness abrasive widely used for:
- Precision lapping
- Optical polishing
- Mechanical seal finishing
- Ceramic and carbide surface processing
- Metallographic sample preparation
Key Characteristics
| Property | Value |
| Mohs Hardness | 9.4 |
| Purity | ≥ 99% |
| Brittleness | High |
| Crystal Shape | Sharp, angular |
| Color | Green |
Common Misunderstandings in the Market
| Misunderstanding | Reality |
| “F600 and F800 are almost the same.” | Their PSD difference significantly affects finish quality. |
| “D50 is enough to judge quality.” | D10 & D90 determine scratch risk and uniformity. |
| “Higher purity means better performance.” | Shape and PSD stability matter more. |
| “All micro powders are equally classified.” | Air‑classifying accuracy varies greatly by supplier. |
| “Agglomeration is normal and unavoidable.” | Good surface treatment reduces agglomeration. |
Technical Specifications Comparison
Chemical Composition
| Component | Typical Content |
| SiC | ≥ 99.0% |
| Free Carbon | ≤ 0.10% |
| Fe₂O₃ | ≤ 0.05% |
| Moisture | ≤ 0.10% |
Physical Properties
| Property | F600 | F800 |
| Hardness | Mohs 9.4 | Mohs 9.4 |
| Brittleness | High | Very high |
| Cutting Speed | Faster | Slower |
| Surface Finish | Fine | Ultra‑fine |
Technical & Production Explanation
Furnace Stability
Temperature curve affects crystal purity and brittleness.
Milling Technology
- Jet milling → uniform micro powder, low contamination
- Ball milling → risk of iron contamination
Classification Accuracy
High‑precision air classifiers are essential for F600–F800.
Magnetic Separation
Removes iron impurities that cause scratches.
Surface Treatment
Anti‑agglomeration treatment improves slurry stability.
Performance Differences in Lapping
Cutting Speed
- F600 removes material faster
- F800 cuts slower but more uniformly
Surface Roughness (Ra)
- F600: Ra 0.05–0.08 μm
- F800: Ra 0.02–0.04 μm
Flatness & Precision
- F800 → better flatness, fewer scratches
- F600 → ideal for pre‑lapping
Typical Application Flow
- F600 for initial lapping
- F800 for final finishing
Typical Issues Buyers Face with F600 & F800
PSD Instability
Causes uneven cutting and scratches.
Agglomeration
Affects slurry flow and uniformity.
Excessive Impurities
Fe₂O₃ causes discoloration and scratches.
Poor Particle Shape
Blocky → slow cutting Needle‑like → deep scratches
Moisture Absorption
Affects slurry viscosity and consistency.
Pros & Cons of Different Options
| Feature | F600 | F800 |
| Cutting Speed | Faster | Slower |
| Surface Finish | Fine | Ultra‑fine |
| Scratch Risk | Medium | Low |
| Cost | Lower | Higher |
| Best Use | Pre‑lapping | Final finishing |
How We Control Quality
High‑Purity Raw Materials
Ensures stable hardness and color.
Jet Milling + Precision Classification
Guarantees consistent PSD.
Multi‑Stage Magnetic Separation
Fe₂O₃ ≤ 0.05%.
Anti‑Agglomeration Treatment
Improves slurry stability.
Batch‑to‑Batch PSD Reports
Ensures consistency for industrial buyers.
Packaging & Export Options
| Packaging | Weight | Features |
| 25 kg bags | Standard | Moisture‑proof |
| 20 kg cartons | Micro powder | Cleaner handling |
| 1 MT jumbo bags | Bulk | Cost‑effective |
| OEM bags | Optional | Custom branding |
Final
If you are looking for high‑purity, stable, FEPA‑compliant Green Silicon Carbide F600 or F800, we can provide:
- Consistent PSD
- Ultra‑low impurities
- Jet‑milled micro powder
- Competitive factory pricing
- Fast delivery
- Free samples for testing
