High-purity fused silica B and AB grade with controlled particle size distribution for precision casting shells and molds.
Investment casting requires exceptional dimensional accuracy, surface quality, and thermal stability. Fused Silica, with its extremely low thermal expansion and excellent thermal shock resistance, is one of the most widely used materials for precision casting shells and molds.
Our fused silica materials are successfully used by customers in Switzerland and Sweden, meeting strict European technical standards for investment casting operations.
For investment casting applications, Fused Silica B Grade and AB Grade are specifically selected due to their stable particle size distribution (PSD) and controlled impurity levels.
Optimized for primary and backup shell systems requiring balanced performance and cost efficiency. Widely used for structural shell strength.
Designed for higher precision layers where finer PSD and higher SiO₂ purity are required. Preferred for surface finish and dimensional precision.
Both grades offer consistent performance in ceramic shell building and high-temperature pouring processes.
| SiO₂ (Grains) | 99.8% min |
| SiO₂ (Powders) | 99.7% min |
| Al₂O₃ | < 500 ppm |
| Fe₂O₃ | < 300 ppm |
| Na₂O | < 100 ppm |
| K₂O | < 100 ppm |
| +2.0 mm | 2–8% |
| +1.0 mm | 40–60% |
| +0.5 mm | 30–50% |
| +0.212 mm | 2–8% |
| +0.063 mm | 15–30% |
| −0.063 mm | 60–80% |
| SiO₂ (Grains) | 99.85% min |
| SiO₂ (Powders) | 99.7% min |
| Al₂O₃ | < 500 ppm |
| Fe₂O₃ | < 300 ppm |
| Na₂O | < 100 ppm |
| K₂O | < 100 ppm |
| Range | 0.2 – 0.5 mm |
| 0.5 – 0.212 mm | 80% min |
| +0.045 mm | 5% max |
Minimizes shell cracking and distortion during pouring and cooling, ensuring dimensional accuracy.
Maintains shell integrity under rapid temperature changes during metal pouring.
Ensures consistent slurry behavior and shell strength for repeatable casting results.
Reduces defects and improves casting surface quality for precision components.
These advantages result in higher yield, lower scrap rate, and improved casting accuracy.
Contact our technical team to discuss your precision casting requirements and get grade recommendations based on your shell system.