Schott SF57HHT Glass

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Schott SF57HHT Glass
Categories:	Ceramic; Glass
Material Notes:	Information Provided by SCHOTT North America, Inc.
Key Words:	847238.551
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Physical Properties	Metric	English	Comments

Density	5.51 g/cc	0.199 lb/in³

Chemical Properties	Metric	English	Comments
Acid Class, SR	52.3	52.3
Alkali Class, AR	2.3	2.3
Stain Resistance Class, FR	5.0	5.0

Mechanical Properties	Metric	English	Comments
Knoop Microhardness	350	350	.1/20
Modulus of Elasticity	54.0 GPa	7830 ksi
Poissons Ratio	0.248	0.248
Shear Modulus	22.0 GPa	3190 ksi	calculated

Thermal Properties	Metric	English	Comments
CTE, linear	8.30 µm/m-°C @Temperature -30.0 - 70.0 °C	4.61 µin/in-°F @Temperature -22.0 - 158 °F
	9.20 µm/m-°C @Temperature 20.0 - 300 °C	5.11 µin/in-°F @Temperature 68.0 - 572 °F
Specific Heat Capacity	0.360 J/g-°C	0.0860 BTU/lb-°F
Thermal Conductivity	0.620 W/m-K	4.30 BTU-in/hr-ft²-°F
Transformation Temperature, Tg	414 °C	777 °F
Softening Point	519 °C	966 °F	Viscosity 10^7.6 dPa s
Annealing Point	391 °C	736 °F	Viscosity 10^13.0 dPa s

Optical Properties	Metric	English	Comments
Refractive Index	1.84666 @Wavelength 587.6 nm	1.84666 @Wavelength 587.6 nm	n_d
	1.85504 @Wavelength 546.1 nm	1.85504 @Wavelength 546.1 nm	n_e
Abbe Number	23.64	23.64	ve
	23.83	23.83	vd
Optical Dispersion	0.035536	0.035536	nf - nc
	0.036166	0.036166	nf' - nc'
Transmission, Visible	62.1 % @Thickness 10.0 mm, Wavelength 380 nm	62.1 % @Thickness 0.394 in, Wavelength 380 nm
	94.1 % @Thickness 10.0 mm, Wavelength 405 nm	94.1 % @Thickness 0.394 in, Wavelength 405 nm
	99.1 % @Thickness 10.0 mm, Wavelength 460 nm	99.1 % @Thickness 0.394 in, Wavelength 460 nm
	99.9 % @Thickness 10.0 mm, Wavelength 580 nm	99.9 % @Thickness 0.394 in, Wavelength 580 nm
	99.9 % @Thickness 10.0 mm, Wavelength 700 nm	99.9 % @Thickness 0.394 in, Wavelength 700 nm
IR Transmittance	91.4 % @Thickness 10.0 mm, Wavelength 2500 nm	91.4 % @Thickness 0.394 in, Wavelength 2500 nm
	99.8 % @Thickness 10.0 mm, Wavelength 1530 nm	99.8 % @Thickness 0.394 in, Wavelength 1530 nm
UV Transmittance	1.0 % @Thickness 10.0 mm, Wavelength 365 nm	1.0 % @Thickness 0.394 in, Wavelength 365 nm
	25 % @Thickness 10.0 mm, Wavelength 370 nm	25 % @Thickness 0.394 in, Wavelength 370 nm

Descriptive Properties
B	0
Climatic Resistance Test CR	2
HG	1
K (10^-6mm²/N)	0.02
Phosphate Resistance PR	4.3

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CSGS094 / 93428

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