Graded Seal Glass Rod

Specialising in glasses with high melting temperatures, we are manufacturers of glass with intermediate expansions for graded seal applications in glass-to-glass and glass-to-metal seals, such as fused silica (quartz) to tungsten.

GS10 Graded Seal Glass Rod

Coefficient of Expansion 9.5 to 11.5 x 10-7 (temperature range 50° to 400°C). Other Properties Strain point 625°C Annealing point 750°C Softening point 1210°C Log _ 250 9.5 Log _ 350 7.9 Tk100 345°C Density 2.17 (at 4°C)

GS15 Graded Seal Glass Rod

Coefficient of Expansion 13.5-15.5 x 10-7 (temperature range 50 to 400 c). Other Properties Strain point 635°c Annealing point 740°c Softening point 1200°c Log _ 250 9.8 Log _ 350 8.2 Tk100 365°c

GS20 Graded Seal Glass Rod

Coefficient of Expansion 17.0 to 19.0 x 10-7 (temperature range 50o to 400°C). Other Properties Strain point 645°C Annealing point 730°C Softening point 1190°C Log _ 250 10.1 Log _ 350 8.5 Tk100 385°C

GS25 Graded Seal Glass Rod

Coefficient of Expansion 24.0 to 26.0 x 10-7 (temperature range 50° to 400°C). Other Properties Strain point 615°C Annealing point 690°C Softening point 1150°C Log _ 250 10.7 Log _ 350 9.1 Tk100 435°C

GS30 Graded Seal Glass Rod

Coefficient of Expansion 28.0 to 30.0 x 10-7 (temperature range 50° to 400°C). Other Properties Strain point 550°C Annealing point 640°C Softening point 1075°C Log _ 250 10.7 Log _ 350 9.1 Tk100 435°C

GS44 Graded Seal Glass Rod

Coefficient of Expansion 42.0 to 44.0 x 10-7 (temperature range 50° to 400°C). Other Properties Strain point 510°C Annealing point 550°C Softening point 790°C Log _ 250 9.1 Log _ 350 7.3 Tk100 305°C

B37 Graded Seal Glass Rod

Coefficient of Expansion 36.5 to 38.5 x 10-7 (temperature range 50° to 400°C). Other Properties Strain point 490°C Annealing point 560°C Softening point 770°C Log _ 250 8.7 Log _ 350 7.1 Tk100 290°C Density 2.25 (at 4°C)

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New website for Transition Glass

We have now launched our new website which has a modern look and feel and carries more customer information than ever before.

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Production Doubles

We will be commencing production from new furnaces, if you have any special or new requirements please contact us.

Semiconductor industry growth expected to double

At Semicon West, SEMI North American President Jonathon Davies said that the semiconductor industry is "begining a multi-year recovery"with grow

Reliable Industrial Measurement of Core Body Temperature Project Published Glass

Commissioned by British Glass, our members and the IOSH Research Committee, a research project into reliable industrial measurement of core body