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Schott N-SK4 Glass

Category Ceramic , Glass
Manufacturer Schott North America
Trade Name
Port Ningbo port,China
Trade Terms FOB, CFR, CIF
Payment Terms L/C, T/T, Western Union
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Material Notes:
Information Provided by SCHOTT North America, Inc.
Physical Properties Metric English Comments
Density 3.54 g/cc
0.128 lb/in³
Mechanical Properties Metric English Comments
Knoop Microhardness 580
580
.1/20
Modulus of Elasticity 84.0 GPa
12200 ksi
Poissons Ratio 0.261
0.261
Shear Modulus 33.0 GPa
4790 ksi
calculated
Thermal Properties Metric English Comments
CTE, linear 6.50 µm/m-°C

@Temperature -30.0 - 70.0 °C
 3.61 µin/in-°F

@Temperature -22.0 - 158 °F
7.40 µm/m-°C

@Temperature 20.0 - 300 °C
 4.11 µin/in-°F

@Temperature 68.0 - 572 °F
Specific Heat Capacity 0.570 J/g-°C
0.136 BTU/lb-°F
Thermal Conductivity 0.830 W/m-K
5.76 BTU-in/hr-ft²-°F
Transformation Temperature, Tg 658 °C
1220 °F
Optical Properties Metric English Comments
Refractive Index 1.61272

@Wavelength 587.6 nm
 1.61272

@Wavelength 587.6 nm
 n<sub>d</sub>
1.61521

@Wavelength 546.1 nm
 1.61521

@Wavelength 546.1 nm
 n<sub>e</sub>
Transmission, Visible 97.1 %

@Thickness 10.0 mm,
Wavelength 380 nm
 97.1 %

@Thickness 0.394 in,
Wavelength 380 nm
99.2 %

@Thickness 10.0 mm,
Wavelength 405 nm
 99.2 %

@Thickness 0.394 in,
Wavelength 405 nm
99.4 %

@Thickness 10.0 mm,
Wavelength 460 nm
 99.4 %

@Thickness 0.394 in,
Wavelength 460 nm
99.8 %

@Thickness 10.0 mm,
Wavelength 580 nm
 99.8 %

@Thickness 0.394 in,
Wavelength 580 nm
99.8 %

@Thickness 10.0 mm,
Wavelength 700 nm
 99.8 %

@Thickness 0.394 in,
Wavelength 700 nm
IR Transmittance 68.6 %

@Thickness 10.0 mm,
Wavelength 2500 nm
 68.6 %

@Thickness 0.394 in,
Wavelength 2500 nm
99.1 %

@Thickness 10.0 mm,
Wavelength 1530 nm
 99.1 %

@Thickness 0.394 in,
Wavelength 1530 nm
UV Transmittance 10.2 %

@Thickness 10.0 mm,
Wavelength 320 nm
 10.2 %

@Thickness 0.394 in,
Wavelength 320 nm
52.5 %

@Thickness 10.0 mm,
Wavelength 334 nm
 52.5 %

@Thickness 0.394 in,
Wavelength 334 nm
94.6 %

@Thickness 10.0 mm,
Wavelength 370 nm
 94.6 %

@Thickness 0.394 in,
Wavelength 370 nm
Chemical Properties Metric English Comments
Acid Class, SR 51.2
51.2
Alkali Class, AR 2.0
2.0
Stain Resistance Class, FR 1.0
1.0
Descriptive Properties Value Comments
B 1
Climatic Resistance Test CR 3
HG 3
K (10-6mm2/N) 1.92
Phosphate Resistance PR 2
T1013.0 (°C) 646
T107.6 (°C) 769
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