Brosilicate Glass Properties
Metric | US | |
Coefficient of mean linear thermal expansion α acc. to DIN ISO 7991 |
3.3 * 10^{-6} K^{-1} (20°C; 300°C) |
3.3 * 10^{-6} K^{-1} (68°F; 572°F) |
Transformation temperature T_{g} | 525°C | 977°F |
Density ρ at 25°C | 2.23g*cm^{-3} | 139.2 lb * ft^{-3} |
Modulus of elasticity E (Young's modulus) | 63 * 10^{3} N * mm^{-2} | 91*10^{5} lb * in^{-2} (psi) |
Poisson's ratio µ | 0.20 | 0.20 |
Thermal conductivity λ_{w} at 90°C | 1.2 W * m^{-1} * K^{-1} | 0.69 Btu * hr^{-1} * ft^{-1} * °F^{-1} |
Refractive index (λ = 587.6nm) n_{d} | 1.473 | 1.473 |
Stress-optical coefficient (DIN 52 314) K | 4.0 * 10^{-6} mm^{2} * N^{-1} | 4.0 * 10-6 mm2 * N-1 |