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Alumina-chrome Brick Al2O3 % ≥83.5 Cr2O3 % xz≥9 CaO % ≤1.5 Bulk Density ( g/cm3) ≥3.2 Cold Crushing Strength 110℃ N/mm2 ≥80 1200℃ N/mm2 ≥90 Thermal Expansion 800℃ W/m K ≤4.4 1200℃ W/m K ≤4.1 Linear ...