Fire clay brick sk-32 ItemStandard Ai2o3(%)30 Fe2o3 (%)3.5 Refractoriness (sk)32 Refractoriness under load, 0.2mpa, ta, (°c)1300 Porosity (%)22-26 Bulk density (g/cm³)2.05 Cold crushing strength (mpa)25 Thermal expansion at 1000°c (%)0.6 Sk-34 ItemStandard Ai2o3(%)45 Fe2o3 (%)2.0 Refractoriness (sk)34 Refractoriness under load, 0.2mpa, ta, ((°c)1350 Porosity (%19-23 Bulk density (g/cm³)2.10-2.15 Cold crushing strength (mpa)25 Thermal expansion at 1000°c (%)0.6.