Specifications for sitall (type CO115 M)

Sitall is Russian analogue of Zerodur.

Coefficient of linear thermal expansion, 10-7 K-1
from 213 to 333 K
from 293 to 573 K
 
0.0 + 0.6
2.8 +/- 1.0
Specific heat, kJ/kg x K 0.92
Thermal conductivity, W/mK 1.71
Heat resistance, K 823
Density, g/cm3 2.46
Microhardness, 107 Pa 784
Modulus of elongation (Young), 107 Pa 9.02
Poisson's ratio 0.28
Bending strength, 107 Pa 16.6
Relative abrasion hardness
    (referring to BK7 type of glass)
1.78
Refractive index, nd 1.536 +/- 0.004
Mean dispersion 0.0102 +/- 0.0003
Maximum dimension of blanks, mm
     diameter
     side of rectangular blank
     thickness

1500
1000
300
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