Our new glass type 0834 serves with its high thermal expansion of 9,9 ∙ 10-6/K-1 as well as its Tk100 of 265 ∙ 108 Ω cm iideal requirements for the sealing of many steels, especially of ferritic steels (1.4762, 1,4820 und AISI446), which need a high thermal expansion coefficient. The glass has a wide temperature range of viscosities and can thereby be processed very well.