|
MIN-SIL® Fused Silica
Investment Casting Grades: Flours
Sieve Analysis
| U.S. Std Sieve % |
120F |
200F |
290F |
325F |
| 30 |
- |
- |
- |
- |
| 40 |
- |
- |
- |
- |
| 50 |
< 1 |
- |
- |
- |
| 80 |
- |
< 1 |
- |
- |
| 100 |
< 10 |
< 1 |
- |
- |
| 140 |
- |
< 3 |
< 2 |
- |
| 200 |
- |
< 8 |
< 5 |
< 3 |
| 325 |
41-49 |
13-19 |
4-15 |
4-11 |
| Pan |
45-52 |
71-79 |
80-97 |
86-97 |
| Microtrac PM 50% μm |
48-62 |
19-27 |
14-19 |
9-16 |
| Magnetics ppm |
< 50 |
< 50 |
< 50 |
< 25 |
| Physical Properties: |
| Apparent Specific Gravity |
2.18 – 2.20 g/cc |
| Thermal Properties: |
| CTE Coefficient (20-700 °C) |
0.5-0.6 x 10-6 /°C |
| Electrical Properties: |
| Conductivity |
< 5 μmhos |
| Chemical Composition: |
| SiO2 |
> 99.7 % |
| Al2O3 |
< 1,700 ppm |
| Fe2O3 |
< 280 ppm |
| TiO2 |
< 250 ppm |
| K2O |
< 120 ppm |
| CaO |
< 75 ppm |
| Na2O |
< 50 ppm |
|
|
PROFILE
Investment Casting