Kimble EN-1, Kovar Sealing Glass

Kimble Glass Company as not produced EN-1 glass in over a decade, but now our supplier has been licensed by Kimble Glass of Vineland, NJ to produce this excellent Kovar sealing glass. Under the close supervision of Kimble, our supplier will melt EN-1 Glass to meet the ASTM F105-72 standard for Type 58 Borosilicate Sealing Glass. We will customize our melt to meet customer demand with exacting specifications in size ranging from .010” to .125” diameters. Contact us at sales@glassdynamicsllc.com

Glass Code: Kimble EN-1^®			EN-1
Type			Borosilicate
Color			Clear
Principal Use			Kovar Sealing
Thermal Expansion	Multiply by 10^-7cm/cm/°C	0 - 300°C.	47.0
Thermal Contraction		25°C. to setting point	64.0
Working Point		Log viscosity=4	1115º C
Softening Point		ASTM-C-338	716º C
Annealing Point		ASTM-C-336	482º C
Strain Point		ASTM-C-336	437º C
Density-annealed gm/cc			2.27
Log₁₀ of Volume Resistivity ohm/cm.		250°C	5.1
		350°C.	7.2
Dielectric Properties (1 MHz 25°C)		Dielectric constant	5.1
		Loss factor %	1.3
Refractive index			1.48