Low-E Soda-Lime Glass

Low-emissivity soda-lime glass combines float glass with a low-E coating to reduce radiant heat transfer in energy and thermal-control applications.

Attribute	Value
Process	Glass fabrication; coating; cutting; edging; heat treatment if compatible with coating
Features	Low emissivity; thermal control; energy efficiency; coated float glass
Substrate(s)	Low-E coated soda-lime glass
Color	Clear/neutral, coating dependent
Transmission Range (nm)	380 - 2500 nm
Refractive Index	1.52
Sheet Length - Max (mm)	3302mm
Sheet Width - Max (mm)	1828.8mm
Knoop's Hardness kg/mm²	522
Softening Point °C	726°C
Annealing Point °C	546°C
Strain Point °C	514°C
Transformation Temperature (Tg) °C	520
CTE (Coefficient of thermal expansion) α in 10-6 · K-1 (20°C; 300°C)	8.9
Specific Heat Capacity (Cₚ) kJ/(kg·K) (20–100°C)	3302
Thermal Conductivity (ʎ) W/(m·K) (90°C)	1.1
Photoelastic Constant (nm/cm/MPA)	26.9
Can be strengthened?	Yes

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