Mortar — NK Mortar-31
Scientific and technical documentation: technical specification 1521-059-22298789-2010
Main properties:
| Maximum operating temperature | 1400 | °C |
| Passage through the grid number 1 | 100 | % |
| Passage through the grid number 5 | 95 | % |
Chemical analysis:
| Al2O3 | 31 | % |
| Fe2O3 | 1,8 | % |