Chemical Strengthening - Berliner Glas KGaA Herbert Kubatz GmbH & Co. - #2

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Berliner Glas KGaA Herbert Kubatz GmbH & Co • Waldkraiburger Str. 5 • D-12347 Berlin techglas@berlinerglas.de • Phone: +49 30 60905-0 • Fax: +49 30 60905-100 www.berlinerglas.com Chemical strengthening e0407 Chem. strengthened glass Untreated glass Impact resistance (with ball drop test, 150,7 g/ height 1 m) 4 - 10 Joule (depending on conditions of test) 1 - 2 Joule (1 Joule = 1 N*m) Flexibility strength ó bB: (similar to pr EN 12337) 150 N/mm² 50 N/mm² Resistance to temperature (according to DIN 52313) 350°C for 1 mm glass 300°C for 2 mm glass 270°C for 3 mm glass 250°C for 4 mm glass 170°C for 1 mm glass 130°C for 2 mm glass 120°C for 3 mm glass 100°C for 4 mm glass Vicker hardness 626 HV0,2/15 550 HV 0,2/15 Max. application temperature 300°C (above 300°C the chemical hardening can be reduced or lost) 450°C Comparison of properties of chemically strengthened and of untreated glass The above data are merely guidelines. In exceptional cases we recommend tests under the relevant operating conditions. All other physical and chemical properties of the glass are minimally affected. Quality Assurance Maintenance of the process parameters, temperature and duration of toughening is electronically controlled, monitored and documented by records. Regular analysis of the salt bath guarantees the quality of the hardening. Each lot is tested for the degree of penetration and surface stress. Our chemically toughened glass is reduced according to pr EN 12337. Notes The edges of all chemically toughened glass should be chamfered. After chemical hardening no further edge treatment is possible. Later cutting will be possible with a reduction of the edge resistance stability. On request we mark the glass “BG�Þ CG” for “chemically toughened”. Chemically toughened glass can subsequently be printed or coated. Measuring instruments for quality assurance Gloss BYK Gardner Glossmaster, Haze-Guard Plus Roughness Perthometer, White light Interferometer Transmission and reflection Spectrometer Outlines Smartscope, optical 3D- measurement Layer Resistance Climatic chamber, abrasion test Cleanliness Dark field illuminator Flatness Interferometer Surface defects/inclusions/edge chips Profile projector, digital microscope