Interested in GLASSMATE®-HT graphite?

Interested in GLASSMATE®-HT graphite?


  • High temperature production runs
  • Mold top inserts
  • Creations of larger glass containers


Particle size
5 µm (197 µin)
Apparent density 1.74 g/cm3 (0.063 lb/in3)
Compressive strength 136 MPa (19,700 psi)
Flexural strength1 81 MPa (11,800 psi)
Shore hardness 74
Coefficient of thermal expansion 
8.1 µm/m°C (4.5 µin/in°F)
Thermal conductivity2 85 W/m-K (50 Btu-ft/hr/ft2°F)
Purity <3000 ppm ash
Oxidation threshold3 1,125°F (607°C)

1Measured using three-point bend method. 2Approximate values taken at room temperature; as temperature increases, thermal conductivity decreases. 3Oxidation threshold defined as temperature at which oxidation weight loss after 24 hours is approximately 1%. (Size 0.5" x 0.5" x 1").


Grade Chart

GLASSMATE® Graphite Grades Table