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This data is typical of the products made. Packaged in 55 lb. bags (Custom particle sizes and packaging available).

MIN-SIL® Fused Silica

Investment Casting Grades: Grains



Sieve Analysis



U.S. Std. Sieve % 10/20 30/50 50/100 F100
  8 <2 - - -
  12 6 – 25 - - -
  16 33 – 50 - - -
  20 25 – 45 <1 - -
  30 <13 15 – 30 - -
  40 - 38 – 50 - -
  50 <4 20 – 35 <13 -
  70 - - 30 – 60 -
  80 - <10 - -
  100 - - 28 – 51 <15
  140 - - 4 – 16 17 – 40
  200 - - <2 19 – 34
  325 - - - 14 – 30
  Pan <3 <2 <1 4 – 20
  Magnetics ppm <50 <50 <50 <50


Physical Properties:
  Apparent Specific Gravity 2.18 – 2.20 g/cc


Thermal Properties:
  LTE Coefficient (20-700 °C) 0.5-0.6 x 10-6 /°C


Chemical Composition
  SiO2 > 99.7 %
  Al2O3 < 1,700 ppm
  Fe2O3 < 280 ppm
  TiO2 < 250 ppm
  K2O  < 120 ppm
  CaO < 75 ppm
  Na2O < 50 ppm