SUPREMAX® 33 Rolled Borosilicate Glass

SUPREMAX® 33 is a rolled borosilicate glass available in sheet form with a chemical composition identical to SCHOTT’s floated borosilicate glass BOROFLOAT® 33.

The outstanding physical and chemical properties of SUPREMAX® 33 offer the benefits of low thermal expansion, high thermal resistance, excellent light transmission and impressive chemical durability. SUPREMAX® 33 is also a low density glass that is 12 % lighter than soda lime glass. This, in combination with the availability of a broad thickness range, makes SUPREMAX® 33 a highly versatile material suitable for an unlimited array of applications.

SUPREMAX® 33 is a borosilicate glass type 3.3 as specified in the international standard ISO 3585. The quality of SUPREMAX® 33 is guaranteed by our ISO 9001 certified quality assurance system.

SUPREMAX® 33 is environmentally friendly and made of nonhazardous inorganic and natural raw materials. The glass can be recycled several times and disposed of without difficulties.

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Sheet Sizes and Tolerances

Standard Sheet size

  • Gross Dimensions in mm (inch):
  • Net Dimensions in mm (inch):
  • 1,200 x 1,500 (47.24 x 59.06)
  • 1,000 x 1,500 (39.37 x 59.06)

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Available Thicknesses

  • Thicknesses in mm (inch)
  • 28.60 (1 1/8)
  • 31.75 (1 1/4)
  • 34.90 (1 3/8)
  • 41.30 (1 5/8)
  • 47.60 (1 7/8)
  • 57.20 (2 1/4)
  • Tolerances in mm (inch)
  • ± 1.0 (± 0.040)
  • ± 1.0 (± 0.040)
  • ± 1.6 (± 0.064)
  • ± 1.6 (± 0.064)
  • ± 3.2 (± 1.125)
  • ± 6.4 (± 0.250)

SUPREMAX® 33 rolled borosilicate glass can be cut to size within the standard sizes.

Technical Properties

Spectral
ultra
Thermal PropertiesChemical Durability
Coefficient of Thermal Expansion a [20-300 °C/68-572 °F3.25 x 10-6 K-1Acid Resistance[ISO 1776] 1
Specific Heat Capacity Cp [20-100 °C/68-212 °F]0.83 kJ/(kg x K)Alkali Resistance[ISO 695] A2
Thermal Conductivity l [90 °C/194 °F]1.2 W/(m x K)Hydrolytic Class[ISO 719] HGB 1
Softening Point [107.6 dPas]820 °C/1508 °F[ISO 720] HGA 1
Annealing Point [1013 dPas]560 °C/1040 °F
Strain Point [1014.5 dPas]518 °C/964 °F
Transformation Temperature Tg530 °C/986 °F
Electrical PropertiesMechanical Properties
Dielectric Constant er [at 25 °C and 1MHz] 4.6Density2.23 g/cm3
Loss Tangent tan d [at 25 °C and 1MHz]37 x 10-4Young's Modulus [E]64 GPa
Specific Electric Volume ResistivityPoisson's Ratio0.2
lg r 250 °C 8.0 Ω x cmShear Modulus27 GPa
lg r 350 °C 6.5 Ω x cmVickers Hardness [0.2/15]568
tk100250 °C/482 °FKnoop Hardness [0.1/20]480
Optical Properties
Refractive Index nd [l 587.6 nm]1.472
Stress Optical Coefficient [K]4.0 x 10-6 mm² N-1
Dispersion (nF - nc) 71.9 x 10-4
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