Alloy 42 (42Ni-Fe) - UNS K94100 | Low Thermal Expansion Alloys

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Alloy 42 (42Ni-Fe) - UNS K94100 | Low Thermal Expansion Alloys Specification

Grade
Alloy 42 (42Ni-Fe)

Application
Lead frames, Glass Encapsulants

Width
Please contact us.

Shape
Coil, Sheet

Chemical Composition
42Ni-Fe

Temper
Annealed, Skin passed, As Rolled (Hard)

Thickness
Please contact us.

Alloy 42 (42Ni-Fe) - UNS K94100 | Low Thermal Expansion Alloys Trade Information

Payment Terms
Telegraphic Transfer (T/T)

Packaging Details
Our Standard Packing for Export

Main Export Market(s)
Asia, North America, South America, Eastern Europe, Western Europe, Middle East

About Alloy 42 (42Ni-Fe) - UNS K94100 | Low Thermal Expansion Alloys

Grade	Alloy 42 (42Ni-Fe)
Reference Standards (for reference only)	UNS K94100 DIN 1.3917 (17745)
Shape	Coil, Sheet
Thickness	Please contact us.
Width	Please contact us.
Length	Strip or Sheet(Length less than 2,000mm)
Technique	Cold Rolled
Temper	Annealed, Skin passed, As Rolled(Hard)
Application	Lead frames, Glass Encapsulants
Coil I.D.	300, 400, 566mm
Chemical Composition	42Ni-Fe
Density	8.11 g/cm
Thermal Expansion	4.0-4.710/K (20480)
Thermal Conductivity	10.5 W/(mK)
Minimum Order Quantity	Please contact us.
Country of Origin	Japan
Payment Terms	Telegraphic Transfer (T/T)
Delivery Terms	EXW, FOB, CIF, DAP etc.
Packaging Details	Our Standard Packing for Export
Main Export Market(s)	Asia, Muddle East, North America, South America, Europe etc.

Alloy 42 (42Ni-Fe) - UNS K94100 Description:

Alloy 42 is a nickel-iron alloy containing approximately 42% nickel.

It has a low coefficient of thermal expansion, though higher than Alloy 36, and is designed to closely match the thermal expansion of glass, ceramics, and silicon materials.

Because of this compatibility, it is widely used in applications such as glass-to-metal sealing, IC lead frames, and electronic packaging components where dimensional stability and thermal matching are critical.

Its balance of thermal expansion control and mechanical stability makes it suitable for precision electronic and semiconductor-related applications.

Excellent Dimensional Stability

Alloy 42 offers outstanding resistance to thermal expansion, maintaining precise tolerances and dimensions even under varying temperatures. This characteristic makes it an ideal choice for sensitive electronic or encapsulation applications where stability is critical.

Versatile Product Forms and Tempers

We supply Alloy 42 in coils and sheets with a range of tempers: annealed for formability, skin passed for surface quality, and as rolled (hard) for high strength requirements. This flexibility allows customers to select the most appropriate condition for their manufacturing processes.

FAQ's of Alloy 42 (42Ni-Fe) - UNS K94100 | Low Thermal Expansion Alloys:

Q: How is Alloy 42 (42Ni-Fe) typically used in the electronics industry?

A: Alloy 42's low thermal expansion makes it a preferred material for manufacturing lead frames in semiconductors and glass-to-metal seals in electronics, ensuring components remain dimensionally stable during temperature fluctuations.

Q: What are the benefits of choosing Alloy 42 for glass encapsulant applications?

A: The main benefit lies in Alloy 42's thermal compatibility with glass, minimizing stresses and seal failures during temperature changes. This results in improved reliability and longevity in electronic and hermetic sealing applications.

Q: When should Alloy 42 be selected over other nickel-iron alloys?

A: Alloy 42 is chosen when precise dimensional control is required at operating temperatures, notably where a close match with the expansion coefficient of glass or certain ceramics is essential, as in microelectronic packaging.

Q: Where can I source Alloy 42 coils and sheets with custom dimensions?

A: As a seasoned manufacturer, exporter, and supplier in Japan, we provide Alloy 42 in coil and sheet form. Custom thickness and width options are available upon request-please contact us with your requirements.

Q: What processing options are available for Alloy 42 (42Ni-Fe)?

A: Alloy 42 can be supplied in annealed for ease of forming, skin passed for improved surface finish, and as rolled (hard) for enhanced strength. This versatility supports various fabrication and end-use needs.

Q: How does the chemical composition of 42% nickel and balance iron impact the alloy's performance?

A: This specific nickel-iron ratio imparts a low coefficient of thermal expansion to Alloy 42, making it particularly effective in applications that demand dimensional precision under temperature changes.

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