4J42, 4J45, 4J50, 4J52, 4J54 | HB SPECIAL ALLOY MFG

4J42, 4J45, 4J50, 4J52, 4J54snihw2020-04-05T16:44:55+08:00

FeNi Glass Sealing Alloy

Alloy

4J42, 4J45, 4J50, 4J52, 4J54

Similar Grade

GB	ГОСТ
4J42	42Н

Specification

YB/T5235-93, Q/SYY 7-1999, ГОСТ 10994-1974, ГОСТ 14080-78

Product Forms

Sheet, Strip, Plate, Round Bar, Flat Bar, Forgings, Hexagon, Wire

Chemical Composition, %

Alloy	C	Mn	Si	P	S	Ni	Fe
4J42	≤0.05	≤0.8	≤0.3	≤0.02	≤0.02	41.5-42.5	Rest
4J45	≤0.05	≤0.8	≤0.3	≤0.02	≤0.02	44.5-45.5	Rest
4J50	≤0.05	≤0.8	≤0.3	≤0.02	≤0.02	49.5-50.5	Rest
4J52	≤0.05	≤0.6	≤0.3	≤0.02	≤0.02	51.5-52.5	Rest
4J54	≤0.05	≤0.6	≤0.3	≤0.02	≤0.02	53.5-54.5	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℃	20~500℃
4J42	Heating to temperature between 900℃±20℃ in a protective or vacuum atmosphere. Holding for 1hour, cooling to 200℃ at a rate less than 5℃ per min, then air cooling	4.0~5.0	–	6.5~7.5
4J45		6.5~7.2	6.5~7.2	–
4J50		9.2~10.0	9.2~9.9	–
4J52		9.8~11.0	9.8~11.0	–
4J54		10.2~11.4	10.2~11.4	–

Feature

FeNi Glass Sealing Alloys take on a constant linear expansion coefficient under a certain range of temperature.

Application

They are mainly used for match sealing soft glass in ceramic.