Magnesia carbon bricks from MAGTALC Specs Brand MT-8 MT-10 MT-14 MT-18 MT-20 A B C A B C A B C A B C A B C MgO % e 82 80 80 80 78 78 78 77 77 74 73 73 72 71 71 C % e 8 8 8 10 10 10 14 14 14 18 18 18 20 20 20 Apparent Porosity % d 4 5 6 4 5 6 4 5 5 4 5 5 4 5 5 Bulk Density g/ cm3 e 3.05 3.03 3.01 2.98 2.96 2.94 2.95 2.94 2.92 2.90 2.88 2.85 2.88 2.85 2.85 Cold crushing strength MPa e 40 40 40 40 40 35 40 40 35 40 35 35 35 30 25 Hot bending Strength ( 30mm) e1400 ( MPa 6 5 4 6 5 4 12 8 6 12 8 6 12 8 6