Well block and purging plug

Chemical and Physical Properties (Well block) (purging plug)
AL2O3 % >=85 >=85
MgO% 3-5 1-3
Cr2O3 % ----- >2.4
Bulk density g\cm3 >=3.0 >=2.9
Apparent Porosity % =80.0
1500ºC*3h >=100.0 >=80.0
Refractoriness under load : ºC >=1680 >=1680
Modulus of rupture 1400ºC *1h Mpa Mpa >=15.0 >=15.0
Linear change 1500ºC*3h % ±0.2 ±0.2
air permeability, m3/hour at P=4 bar 30M3/H
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