Commodity: Fireclay Brick
N-1 | N-2a | N-2b | n-3a | N-3b | N-4 | N-5 | N-6 | ||
Refractoriness oC | ≥1750 | ≥1730 | ≥1730 | ≥1710 | ≥1710 | ≥1690 | ≥1670 | ≥1580 | |
softening temp under.0.2Mpa load oC | ≥1400 | ≥1350 | ≥1320 | ≥1300 | |||||
linear change after reheating % | 1400*2h | +0.1 -0.4 | +0.1 -0.5 | +0.2 -0.5 | |||||
1350*2h | +0.2 -0.5 | +0.2 -0.5 | +0.2 -0.5 | +0.2 -0.5 | |||||
Apparent Porosity % | ≤22 | ≤24 | ≤26 | ≤24 | ≤26 | ≤24 | ≤26 | ≤28 | |
Cold Crushing Strength , MPa | ≥30.0 | ≥25.0 | ≥20.0 | ≥20.0 | ≥15.0 | ≥20.0 | ≥15.0 | ≥15.0 | |