This technical information has been contributed by
Ferro-Ceramic Grinding, Inc.

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Ceramic Properties - Corning Pyrex (7740)

Pyrex is a Trade Name of Corning Inc. for their borosilicate glass. Borosilicate is known for its ability to withstand thermal shock, and thermal and electrical insulating qualities. Typical ceramic parts uses for this material include labware and many consumer glass products such as coffee pots.

PropertiesUnitsTestValue
Physical
Chemical Formulaborosilicate glass
Density, rg/cm3ASTM C202.23
Colorwhite/ transparent
Crystal Structurerandom
Water Absorption% @R.T.ASTM C3730.0
HardnessMoh's--
Hardnessknoop (kg/mm2)Knoop 100g418
Mechanical
Compressive StrengthMPa @ R.T.ASTM C773N/A
Tensile StrengthMPa @ R.T.ACMA Test #4N/A
Modulus of Elasticity
(Young's Mod.)
GPaASTM C84864
Flexural Strength (MOR)MPa @ R.T.ASTM F41769
Poisson's Ratio, uASTM C8180.20
Fracture Toughness, KIcMPa x m1/2Notched Beam Test0.77
Thermal
Max. Use Temperature
(* denotes inert atm.)
CNo load cond.490
Thermal Shock ResistanceDT (C)Quenching100
Thermal ConductivityW/m-K @ R.T.ASTM C4081.1
Coefficient of Linear Thermal Expansion, almm/m-C (~25C through 1000C)ASTM C3723.25 (through 300C)
Specific Heat, cpcal/g-C @ R.T.ASTM C3510.18
Electrical
Dielectric Constant1MHz @ R.T.ASTM D1504.6
Dielectric StrengthkV/mmASTM D1160.5
Electrical ResistivityWcm @ R.T.ASTM D18298 x 1010

This technical information has been contributed by
Ferro-Ceramic Grinding, Inc.

Click here to find suppliers

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