firebrick price 1) Good thermal shock resistance 2) High-temperature endurable 3) Good thermal insulation Chemical Date of firebrick price ItemClay Brick NZ-42NZ-40NZ-38NZ-35Al2O3 % ≥42403835SiO2 % ≥48505255Fe2O3 % ≤1.82.02.22.5Refractoriness(°C) ≥1750173017201710Bulk Density(g/cm3)2.22.152.12.02kgf/cm2 Refractoriness under load (°C) ≥1400135013201300Permanent Linear Change 1400°C X2h (%)+0.1-0.4 ...