Factory Direct: FeNi42 Electric Vacuum Industrial Sealing Material

4J42 Expansion alloy (Common Name: 42H Glass Sealing 42, Nilo42, N42, FeNi42) 4J42 alloy is mainly composed of iron, nickel elements. It is characterized with a fixed coefficient of expansion. Increase the thermal expansion coefficient and the Curie point with increase of nickel content. 4J42 alloy is widely used the structure of the sealing material in the electric vacuum industry. Normal composition%

Ni	41.5~42.5	Fe	Bal.	Co	-	Si	≤0.3
Mo	-	Cu	-	Cr	-	Mn	≤0.8
C	≤0.05	P	≤0.02	S	≤0.02	Al	≤0.1

Typical Physical properties

Density (g/cm3)	8.12
Electrical resistivity at 20℃(Ωmm²/m)	0.61
Thermal conductivity, λ/ W/(m*℃)	14.6
Curie point T_c/ ℃	360
Elastic Modulus, E/ Gpa	147

Coefficient of expansion

θ/℃	α₁/10^-6℃^-1	θ/℃	α₁/10^-6℃^-1
20~100	5.6	20~400	5.9
20~200	4.9	20~450	6.9
20~300	4.8	20~500	7.8
20~350	4.95	20~600	9.2

Typical Mechanical properties

Tensile Strength	Elongation
Mpa	%
490	35

The heat treatment process
Annealing	Heated to 900 ±20℃ in a hydrogen atmosphere
Holding time, h	1 hour
cooling	With speed not more than 5 ℃ / min. cooling to below 200 ℃

Style of supply

Alloys Name	Type	Dimension
4J42	Wire	D= 0.1~8mm
	Strip	W= 5~250mm	T= 0.1mm
	Foil	W= 10~100mm	T= 0.01~0.1
	Bar	Dia= 8~100mm	L= 50~1000

Expansion alloy Series: 4J29 4J33 4J36 4J42Shijiazhuang Chengyuan Alloy Material Co., Ltd. is a high-tech enterprise specializing in the production of various alloy materials. It has an advanced and complete production line, including material smelting, surface cleaning, rolling, slitting, and a complete test process. Meet the corresponding quality inspection of different products. The company focuses on the production and supply of various electric heating alloys, expansion alloys, soft magnetic alloys, elastic alloys, high temperature alloys and all kinds of pure metals. The product forms include wire, flat wire, strip, plate, bar, foil, Seamless pipe, wire mesh, powder, etc. can meet the application needs of different customers. The various performance indicators of the product are strictly in accordance with the national standards. If customers put forward non-standard requirements, they can also be implemented by reference. Our products are widely used in heating equipment, machinery manufacturing, electric furnace production, instrumentation, household appliances, mineral mining, aerospace, petroleum and nuclear power and other industries, and have received good market feedback. Our products have stable delivery time, excellent quality, sophisticated packaging, and high repurchase rate. They are not only widely recognized in the domestic market, but also have a good reputation in the international market.

* OEM manufacturer * We will deliver the goods to the warehouse of the customer's agent in any city in China. * Terms of delivery: EXW, FCA, FOB, CIF, CPT, DAP * Mode of transport: Sea, Auto, Railway, Air and Express * Payment terms: Bank Transfer, Western Union, PayPal, Alipay * Quality Certificate: In order to improve the quality of products and services, with each order we provide a quality certificate for goods, which includes measured data - chemical composition, electrical resistivity, tensile strength, elongation, melting number, etc. Cheng Yuan Alloy Material Co., Ltd Email: [email protected] Tel .: +86 13673186216 +86 311 8803 3197