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Core Material Characteristics
| Material model | N-200 | ℃ MONARC NEW | N600 | N700 | ||
|---|---|---|---|---|---|---|
| N400 | N450 | N500 | ||||
| Major composition | SiO2-ZrSiO4 | SiO2-ZrSiO4 | SiO2-ZrSiO4-Al2O3 | SiO2-Al2O3 | SiO2-Al2O3 | SiO2-ZrSiO4 |
| Molding method | Pouring method | Method-pressure injection molding | High-pressure injection molding | |||
|
Shirinkage rate |
0.2% | 1.0% | 1.0% | 1.0% | 0.9% | 1.6% |
| Trace impurities(ppm) | ||||||
| Fe | <300 | <80 | <80 | <30 | <200 | <300 |
| Pb | <25 | <25 | <25 | <25 | <25 | <25 |
| Bi | <1 | <1 | <1 | <1 | <1 | <1 |
| Ag | <1 | <1 | <1 | <1 | <1 | <1 |
| Characteristic values | ||||||
| Porosity(%) | 30 | 34 | 33 | 34 | 35 | 34 |
| Thermal expansion rate(%) at 1,000℃ | 0.25 | 0.25 | 0.25 | 0.25 | 0.10 | 0.25 |
| Bending strength(Mpa) | ||||||
| at RT | 7 | 6 | 9 | 10 | 7 | 8 |
| at 1,000℃ | 24 | 20 | 25 | 24 | 20 | 22 |
| Size(mm) | ||||||
| Maximum length | ～L1000 | ～L500 | ～L300 | ～L250 | ||
| Minimum length | 0.80 | 0.50 | 0.50 | 0.30 | ||
| Cast type | CC/DS/SC | CC | CC/DS/SC | CC | CC/DS/SC | |
Selection is made from among the above materials on the basis of the molten metal temperature, casting materials, and shape (size) of the cast product at customer’s request.
