Alloy 42-6 (UNS K94760) | HB SPEICAL ALLOY

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

GB	ГОСТ	ASTM	UNS	DIN	W.Nr.	NF	BS	JIS	SS
4J06	H42X6	42Ni-6Cr Carpenter 426 Sylvania4 Sealmet 4	K94760	Vacovit 426 NiCr426		ASV 426 Ni42Cr6		NRS-1 VEF-426 SNC

Chemical Composition, %

Alloy	C	Mn	Si	P	S	B	Al	Ni	Cr	Fe
4J06	≤0.05	≤0.25	≤0.3	≤0.02	≤0.02	–	≤0.02	41.5-42.5	5.5-6.3	Rest
4J47	≤0.05	≤0.4	≤0.3	≤0.02	≤0.02	–	–	46.8-47.8	0.8-1.4	Rest
4J49	≤0.05	≤0.4	≤0.3	≤0.02	≤0.02	≤0.02	–	46-48	5.0-6.0
4J6A	≤0.05	0.15-0.3	0.15-0.3	≤0.02	≤0.02	–	≤0.3	41.5-42.5	5.4-6.2	Rest
4J6B	≤0.05	0.15-0.3	0.15-0.3	≤0.02	≤0.02	–	0.1-0.2	41.5-42.5	5.4-6.2	Rest
4J49A	≤0.03	0.1-0.3	0.1-0.3	≤0.02	≤0.02	–	0.1-0.25	46-48	5.8-6.5	Rest

Average Linear Expansion Coefficient

Alloy	Heat treatment for sample	Average linear expansion coefficient a/10-6.K-1
Alloy	Heat treatment for sample	20~300℃	20~400℃
4J06	Heating 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 cooling	7.6~8.3	9.5-10.2
4J47		–	8.1~8.7
4J49		8.6~9.3	9.4~10.1
4J6A	Heating 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 cooling	–	9.5~10.2
4J6B		–	9.6~10.2
4J49A		–	9.9~10.6

Available Products and Specifications

Rod, Bar, Wire and Forgings	YB/T5235-93, Q/SYY 7-1999, ГОСТ 10994-1974, ГОСТ 14080-78
Plate, Sheet and Strip	YB/T5235-93, Q/SYY 7-1999, ГОСТ 10994-1974, ГОСТ 14080-78
Pipe and Tube	YB/T5235-93, Q/SYY 7-1999, ГОСТ 10994-1974, ГОСТ 14080-78
Welding Product	–
Others	YB/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.