Precision Alloy 4J33 4J34 4J42 4J43 4J44 4J47 4J47 Fe Ni Co Alloy Plate

Precision Alloy 4J33 4J34 4J42 4J43 4J44 4J47 4J47  Fe Ni Co Alloy Plate
Precision alloy, is a metal material with special physical properties (such as magnetic, electrical, thermal and other properties).Most precision alloys are based on ferrous metals, while a few are based on nonferrous metals.It usually includes magnetic alloys (see magnetic materials), elastic alloys, expansion alloys, thermobimetallic, electrical alloys, hydrogen storage alloys (see hydrogen storage materials), shape memory alloys, magnetostrictive alloys (see magnetostrictive materials), and so on.
 

Grade	4j29,4j36,4j42,4j43,4j44,4j47,4j50etc.
Sharp	wire, bar/rod, strip, sheet, tube
Standard	GB/T15018,YB/T5231-2005,YB/T5241-2005,YB/T5235-2005etc.
Basic performance	It is divided into low-expansion alloy and fixed-expansion alloy, the latter is also known as sealing alloy.Expansion alloy besides has the specific thermal expansion coefficient, according to the different USES also requires a good sealing property, weldability and corrosion resistance, machinability and cutting, and in the use of expansion characteristics caused by the temperature range there is no obvious change of phase transformation, its product is commonly bar, sheet, strip, wire and tube and so on.
Expansion alloy applications	It is widely used in glass, metal and ceramic sealing in avionics and instruments, electric vacuum industry and other electronic devices, electric light source and other fields.

 

Specification
	GB	ASTM	UNS	W.Nr
KOVAR	4J29	F15	K94610	1.3981

 

Grade	%	Ni	Cr	Fe	Co	Cu	C	Mn	Si
Kovar	Min	28.5		Re	16.8
	Max	29.5	0.2		17.8	0.2	0.03	0.5	0.3
		P	S	Mo
		0.02	0.02	0.2

 

Mechanical Properties in the Annealed Condition
Yield Strength (0.1% Offset)		Tensile Strength		Elongation
psi	MPa	psi	MPa	(%)
49,000	340	75,000	520	42

Features
High Curie point
Good low-temperature stability 
Tense oxide film, and can be well wetted by the glass
No reaction with mercury 
Good corrosion resistance in air, fresh water and sea water