Glaslampenschirm

Coefficient os mean linear thermal expansion3.3·10-6K-1Transformation temperature525°cAnnealing point560°cSoftening point825°cworking point1260°cDensity at 25°c2.23g·cm-3 Maximum short-time working temperature is 500°c CF Borosilicate Glass 3.3 is highly resistant to water,neutral and acid solutiongs,concentrated acids and acid mixtures;as well as chlorine,bromine,iodine and organic substances.Hydrofluoric acid,hot phosphoric acid and alkaline solutions do attack the glass surface but this is dependent on their concentration and temperature.