Soda-lime glass Material Properties

Soda-lime glass is the most common glass available and is composed primarily of Silicon Dioxide (SiO2), sodium oxide (Na2O) and calcium oxide or lime (CaO) which acts as a stabilizer. Characteristic properties include hardness and resistance to corrosion. Soda-lime glass is dimensionally stable and has chemical durability. High specific resistivity and a low dielectric constant make it useful as an electrical insulator. Excellent for applications where light transmission is important. Soda-lime is sensitive to changes in temperature with a high coefficient of thermal expansion and poor thermal shock resistance. Polished balls make extremely good seals in check valves.

Applications for precision balls include: valves, spacers, insulators, bearings, lenses


Soda-lime glass

PHYSICAL PROPERTIES
chemical composition SiO2 69% to 73%
K2O + Na2O 16% to 20%
CaO + Al2O3 7% to 10%
density 2.47 g/cm3
MECHANICAL PROPERTIES
hardness 671 HV
THERMAL PROPERTIES
maximum working temperature 300 °C
transformation temperature 517 °C
deformation temperature 590 °C
coefficient of expansion 9.17 x10-6K-1
CHEMICAL PROPERTIES
hydrolytic class 4
OPTICAL PROPERTIES
refractive index 1.51
*values are for guidance only