1.Good thermal shock and thermal spalling resistance 2.High ... contact me.Physical properties:IndexItemSK34Al2O3 ,%≥42Fe2O3, % ≤1.8Compressive Strength , MPa≥25Refractoriness, °C≥1730Apparent Porosity, % ≤24Bulk Density , g/cm32.1Reheat line change,% 1400 ... °C×2h+0.1~ -0.50.2Mpa refractoriness under load ...