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Introducing Nickel Alloy 4J29/4J32, high-precision alloys engineered for exceptional performance in demanding applications. Known for their outstanding thermal expansion properties, these alloys are critical in the manufacture of electronic components, glass-to-metal seals, and aerospace engineering. Alloy 4J29, also known as Kovar, and Alloy 4J32 provide superior dimensional stability and thermal conductivity, ensuring reliable performance in high-temperature and high-vacuum environments. Their excellent machinability and weldability make them ideal for intricate and high-precision components. Trust Nickel Alloy 4J29/4J32 for unmatched reliability and efficiency in your most critical applications.

product details

CHEMICAL COMPOSITION

ERAUM	%	C	Mn	Si	P	S	Cu	Cr	Mo	Ni	Co	Fe
4J29	MIN	-	-	-	-	-	-	-	-	28.5	16.8	balance
4J29	MAX	0.03	0.5	0.30	0.020	0.020	0.20	0.20	0.20	29.5	17.8	balance
4J32	MIN	-	0.2	-	-	-	0.4	-	-	31.5	3.2	balance
4J32	MAX	0.05	0.6	0.20	0.020	0.020	0.8	-	-	33.0	4.2	balance

EXECUTIVE STANDARD

4J29	4J32
GB/T 15018-1994	GB/T 15018-1994
YB/T 5231-1993	YB/T 5241-1993

Product FEATURE

4J29 at 20 ~ 450 ℃ has a similar linear expansion coefficient with the silicon boron hard glass Curie point is higher, and has a good low-temperature organizational stability. The oxide film of the alloy is dense and can be well

well infiltrated by the glass, and does not interact with mercury, making it suitable for use in It does not interact with mercury and is suitable for use in instruments containing mercury discharge. It is the main sealing structure material for electric vacuum devices.

4J32 alloy, also known as Super-Invar alloy, is a low-expansion iron-nickel drilling alloy with a low coefficient of expansion in the range of 20-100°C. The alloy has a low coefficient of expansion in the range of 20-100°C. The alloy is suitable for use as a sealing structure material for electric vacuum devices.

Product application

4J29 is mainly used for electric vacuum components such as emission tubes, oscillator tubes, ignition tubes, magnetrons, transistors, sealed plugs, relays, integrated circuits, lead wires, chassis, shells, brackets, etc., glass sealing, in the application of glass and alloy should be used to match the coefficient of expansion, according to the use of temperature and strict examination of the stability of the organization of its low-temperature, the processing should be carried out in an appropriate heat Treatment to ensure that the material has good deep-drawn properties. The material has good deep drawing performance, when using forging material should be strictly tested for air tightness.

4J32 is suitable for a variety of instruments, instrumentation parts, hot bimetallic passive layer and resonance cavities that require dimensional stability.