Tables of Material Data
Table 2: Material Data
Table 3: Sealing Metals
- Column 2:
The sealing metals indicated are described
in table 3.
- Column 3:
20-300: Mean linear coefficient of expansion
in the temperature range
from 20 to 300°C according to
DIN 52 328.
- Column 4:
Tg: Transformation temperature according
to DIN 52 324
- Column 5:
The indicated viscosity temperatures
mark the following processing
107.6 dPas (softening temperature):
Noticeable deformation of glasses
under their own weight, even after
short heating periods (minutes).
104 (processing temperature): Central
viscosity of the range from 103
to 105 dPas in which most processing
techniques such as pressing,
blowing and drawing are applied.
- Column 7:
tk100 value: Temperature at which
the electrical resistivity is 108
according to DIN 52 326.
- Column 9:
DZ: Dielectric constant;
tan d: Dissipation factor.
- Column 10:
W: Resistance to water according to
DIN ISO 719
S: Resistance to acid according to
DIN 12 116
L: Resistance to alkaline solutions
according to DIN ISO 695
W is subdivided into 5 resistance
classes, S into 4 and L into 3. The
higher the class number, the lower