Characteristics of this series products are as follow:
the brick is made from sintered special grade clay, pressed by high pressure and sintered at high temperature, with excellent spalling resistance, alkali,sodium,sulfur,chlorine and alkalic salt corrosion. Low thermal conductivity, a better and ideal choice for steel industry.

Items	Fireclay brick				High alumina brick
	SK30	SK32	SK34	SK35	SK36	SK37	SK38	SK40
Al2O3,% ≥	30	32	38	45	55	65	70	82
Fe2O3,%≤	2.5	2.5	2	2	2	2	2	2
Refractoriness,SK	30	32	34	35	36	37	38	40
Refractoriness,C	1670	1710	1750	1770	1790	1820	1850	1920
Refractiriness under load,0.2Mpa	1250	1350	1370	1420	1450	1480	1530	1600
Apparent porosity,% ≤	22-26	20-24	20-22	18-20	20-23	20-23	20-22	18-20
Bulk density,g/cm3	1.9-2.0	1.95-2.1	2.1-2.2	2.15-2.22	2.25-2.4	2.3-2.5	2.4-2.6	2.5-2.7
Cold crushing strength,Mpa ≥	20	25	30	40	45	50	60	70