clay bricks

ITEM NL13 SK-30N3 SK32 SK-34N1 NZ42 Refractoriness(SK) ≥32 ≥1710 ≥31 ≥1690 ≥32 ≥1710 ≥34 ≥1750 ≥34 ≥1750 Bulk Density g/cm3 ≥2.3 ≥1.9 ≥1.9 ≥2.0 ≥2.26 Apparent porosity % ≤13 ≤26 ≤26 ≤24 ≤20 Cold Crushing Strength MPa ≥49 ≥19.6 ≥19.6 ≥19.6 ≥40 Lingar Expasion % at1000 Rate of lingar Change % at *2hrs -0.5 +0.5 1350 -0.5 +0.5 1350 -0.5 +0.5 1400 ≤0.2 1350 Soften Yield Point Under Load (T2) at 0.2MPa ≥1450 ≥1350 ≥1350 ≥1400 Chemical Analysis % SiO2 Al2O3 ≥38 ≥39 ≥40 ≥42 Fe2O3 ≤2 ≤1.7 ITEM SK35(H3) SK36 SK37(H2) SK38(H1) LZ80 Refractoriness(SK) ≥35 ≥1770 ≥36 ≥1790 ≥37 ≥1825 ≥38 ≥1850 ≥37 ≥1790 Bulk Density g/cm3 ≥2.1 ≥2.2 ≥2.2 ≥2.3 ≥2.8 Apparent porosity % ≤27 ≤27 ≤27 ≤27 ≤22 Cold Crushing Strength MPa ≥24.5 ≥29.4 ≥29.4 ≥29.4 ≥50 Lingar Expasion % at1000 Rate of lingar Change % at *2hrs -0.6 +0.2 1500 --0.6 +0.2 1500 -0.6 +0.2 1500 --0.6 +0.3 1500 ≤0.7 1400 Soften Yield Point Under Load (T2) at 0.2MPa Chemical Analysis % SiO2 Al2O3 ≥50 ≥52 ≥60 ≥70 ≥80 Fe2O3