FeNiCr Glass Sealing Alloy

Alloy 42-6

Alloy 42-6 fixed expansion glass sealed iron nickel alloy has a linear thermal expansion coefficient similar to that of soft glass in a certain temperature range. It is mainly used for matching sealing with soft glass on electrical components.

Equivalent Grades

GBГОСТASTMUNSDINW.Nr.NFBSJISSS
4J06H42X642Ni-6Cr
Carpenter 426
Sylvania4
Sealmet 4
K94760Vacovit 426
NiCr426
ASV 426
Ni42Cr6
NRS-1
VEF-426
SNC

Chemical Composition, %

AlloyCMnSiPSBAlNiCrFe
4J06≤0.05≤0.25≤0.3≤0.02≤0.02≤0.0241.5-42.55.5-6.3Rest
4J47≤0.05≤0.4≤0.3≤0.02≤0.0246.8-47.80.8-1.4Rest
4J49≤0.05≤0.4≤0.3≤0.02≤0.02≤0.0246-485.0-6.0
4J6A≤0.050.15-0.30.15-0.3≤0.02≤0.02≤0.341.5-42.55.4-6.2Rest
4J6B≤0.050.15-0.30.15-0.3≤0.02≤0.020.1-0.241.5-42.55.4-6.2Rest
4J49A≤0.030.1-0.30.1-0.3≤0.02≤0.020.1-0.2546-485.8-6.5Rest

Average Linear Expansion Coefficient

AlloyHeat treatment for sampleAverage linear expansion coefficient a/10-6.K-1
20~300℃20~400℃
4J06Heating to temperature between 1100℃±20℃ in a protective or vacuum atmosphere. Holding for 15min, cooling to 200℃ at a rate less than 5℃ per min, then air cooling7.6~8.39.5-10.2
4J478.1~8.7
4J498.6~9.39.4~10.1
4J6AHeating to temperature between 850-900℃ in a protective or vacuum atmosphere. Holding for 1hour, cooling to 400℃ at a rate less than 300℃ per hour, then air cooling9.5~10.2
4J6B9.6~10.2
4J49A9.9~10.6

Available Products and Specifications

Rod, Bar, Wire and ForgingsYB/T5235-93, Q/SYY 7-1999, ГОСТ 10994-1974, ГОСТ 14080-78
Plate, Sheet and StripYB/T5235-93, Q/SYY 7-1999, ГОСТ 10994-1974, ГОСТ 14080-78
Pipe and TubeYB/T5235-93, Q/SYY 7-1999, ГОСТ 10994-1974, ГОСТ 14080-78
Welding Product
OthersYB/T5235-93, Q/SYY 7-1999, ГОСТ 10994-1974, ГОСТ 14080-78

Features

FeNiCr Glass Sealing Alloys take on a similar linear expansion coefficient with soft glass under a certain range of temperature.

Applications

They are mainly used for match sealing in soft glass in electronic vacuum industry. Among them, 4J49A, 4J6A can be applied for producing anode caps in kinescopes and connection frames in screen.