FeNi42/ 4J42/ 42Н
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.
Typical Physical properties
|Electrical resistivity at 20℃(Ωmm2/m)||0.61|
|Thermal conductivity, λ/ W/(m*℃)||14.6|
|Curie point Tc/ ℃||360|
|Elastic Modulus, E/ Gpa||147|
Coefficient of expansion
Typical Mechanical properties
|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
|Strip||W= 5~250mm||T= 0.1mm|
|Foil||W= 10~100mm||T= 0.01~0.1|
|Bar||Dia= 8~100mm||L= 50~1000|
#1 SIZE RANGE
Large size range from 0.025mm (.001”) to 21mm (0.827”)
Order Quantity ranging from 1 kg to 10 tonnes
At Cheng Yuan Alloy, we take great pride in customer satisfaction and frequently discuss individual requirements, offering a tailored solution through manufacturing flexibility and technical knowledge.
Delivery within 3 weeks
We typically manufacture your order and ship within 3 weeks, delivering our products to more than 55 countries across the world.
Our lead times are short because we stock in excess of 200 tonnes of more than 60 ‘High Performance’ alloys and, if your finished product is not available from stock, we can manufacture within 3 weeks to your specification.
We take pride in our more than 95% on time delivery performance, as we are always striving for excellent customer satisfaction.
All wire, bars, strip, sheet or wire mesh are securely packed suitable for transporting by road, air courier or sea, with available in coils, spools and cut lengths. All items are clearly labelled with the order number, alloy, dimensions, weight, cast number and date.
There is also the option to supply neutral packaging or labelling featuring the customer’s branding and company logo.
#4 BESPOKE MANUFACTURING
Order is manufactured to your specification
We produce wire, bar, flat wire, strip, sheet to your exact specification and in exactly the quantity you are looking for.
With a range of 50 Exotic Alloys available, we can provide the ideal alloy wire with specialist properties best suited to your chosen application.
Our alloy products, such as the corrosion resistant Inconel® 625 Alloy, is designed for aqueous and off-shore environments, while the Inconel® 718 alloy offers superior mechanical properties in low and sub-zero temperature environments. We also have high strength, hot cutting wire ideal for high temperatures and perfect for cutting polystyrene (EPS) and heat sealing (PP) food bags.
Our knowledge of the industry sectors and state-of-the-art machinery means we can reliably manufacture alloys to strict design specifications and requirements from all over the world.
#5 EMERGENCY MANUFACTURING SERVICE
Our ‘Emergency Manufacturing Service’ for delivery within days
Our usual delivery times are 3 weeks, however if an urgent order is required, our Emergency Manufacturing Service ensures your order is manufactured within days and shipped to your door via the fastest route possible.
If you have an emergency situation and require products even faster, contact us with your order specification. Our technical and production teams will swiftly respond to your quote.