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Item

Ha-42

AI2O3? (%)

≥53

Fe₂O₃ (%)

≤1.7

Alkalies (%)

≤0.6

TiO_2? (%)

≤06

Impurities (%)

≤0.7

Alkalies + Impurities ?(%)

≤1.2

?

?

Apparent Porosity (%)

<22

Bulk density (g/cm3)

≥2.275

Cold crushing strength (MPa)

≥30

Permanent linear change 1400℃/4hr? (%)

±0.2

Creep 1300℃/20-50 hr/0.2MPa? (%)

≤0.2

Refractoriness under load, 0.2MPa, (°C)

0.5%

2.0%

5.0%

?

≥1350

≥1490

≥1560