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
Vendors:	No vendors are listed for this material. Please click here if you are a supplier and would like information on how to add your listing to this material.
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Physical Properties	Original Value	Comments

Density	5.51 g/cc

Chemical Properties	Original Value	Comments
Acid Class, SR	52.3
Alkali Class, AR	2.3
Stain Resistance Class, FR	5.0

Mechanical Properties	Original Value	Comments
Knoop Microhardness	350	.1/20
Modulus of Elasticity	54.0 GPa
Poissons Ratio	0.248
Shear Modulus	22.0 GPa	calculated

Thermal Properties	Original Value	Comments
CTE, linear	8.30 µm/m-°C @Temperature -30.0 - 70.0 °C
	9.20 µm/m-°C @Temperature 20.0 - 300 °C
Specific Heat Capacity	0.360 J/g-°C
Thermal Conductivity	0.620 W/m-K
Transformation Temperature, Tg	414 °C
Softening Point	519 °C	Viscosity 10^7.6 dPa s
Annealing Point	391 °C	Viscosity 10^13.0 dPa s

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