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Fe-42Ni Alloy Strip 4J42 | Ultra-Thin Precision Strip | Controlled Oxidation Layer | Hermetic Packaging & Sensor Seals
Fe-42Ni Alloy Strip 4J42 | Ultra-Thin Precision Strip | Controlled Oxidation Layer | Hermetic Packaging & Sensor Seals
Specifications
Brand Name :
OHMALLOY
Model Number :
4J42
Certification :
ISO，SGS
Place of Origin :
China(Shanghai)
MOQ :
10kg
Price :
negotiable
Supply Ability :
5000kg/month
Packaging Details :
in coil
Material :
invar alloy
Surface :
Bright
Color :
Oxidization
Description
Fe-42Ni Alloy Strip 4J42 | Ultra-Thin Precision Strip
Fe-42Ni Alloy Strip 4J42 | Ultra-Thin Precision Strip | Controlled Oxidation Layer | Hermetic Packaging & Sensor Seals
Ohmalloy Material Co., Ltd is a high-tech enterprise specializing in manufacturing various alloys including high resistance alloy, low-resistance copper nickel alloy, precision alloy, FeCrAl alloy, and thermocouple alloy.
We maintain a complete production line from melting, surface cleaning, rolling and slitting, with comprehensive testing equipment to meet all technical requirements from customers. Our products are widely used in heating equipment, steel mills, mining, electrical equipment, food machinery, automotive industry, and aerospace applications.
Our products are popular in domestic markets and exported worldwide. Our company aims to be the world's highest-quality alloy producer, continuously developing advanced alloy strip technology to serve customers and contribute to a greener future.
Fe-42Ni Alloy Strip 4J42 | Ultra-Thin Precision Strip | Controlled Oxidation Layer | Hermetic Packaging & Sensor Seals
OhmAlloy-4J42 (Expansion Alloy)
Common Names: 42H Glass Sealing 42, Nilo42, N42, FeNi42
4J42 alloy is primarily composed of iron and nickel elements, characterized by a fixed coefficient of expansion. The thermal expansion coefficient and Curie point increase with higher nickel content. This alloy is widely used as structural sealing material in the electric vacuum industry.
Chemical Composition (%)
Element Content Element Content Element Content Element Content
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
Physical Properties
Property Value
Density (g/cm³) 8.12
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
Temperature Range θ/℃ α1/10⁻⁶℃⁻¹ Temperature Range 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
Mechanical Properties
Tensile Strength (Mpa) Elongation (%)
490 35
Heat Treatment Process
Process Parameters
Annealing Heated to 900 ±20℃ in hydrogen atmosphere
Holding time 1 hour
Cooling Cooling rate not more than 5℃/min to below 200℃
Available Forms & Dimensions
Alloy Name Type Dimensions
OhmAlloy-4J42 Wire D= 0.1~8mm
OhmAlloy-4J42 Strip W= 5~250mm | T= 0.1mm
OhmAlloy-4J42 Foil W= 10~100mm | T= 0.01~0.1
OhmAlloy-4J42 Bar Dia= 8~100mm | L= 50~1000
Fe-42Ni Alloy Strip 4J42 | Ultra-Thin Precision Strip | Controlled Oxidation Layer | Hermetic Packaging & Sensor Seals
Frequently Asked Questions
What's the minimum quantity customer can order?
If we have your size in stock, we can provide any quantity you want. If we do not have stock, for spool wire we can produce 1 spool (about 2-3kg), and for coil wire, 25kg minimum.
How can you pay for small sample amount?
We accept wire transfer for sample amounts.
Customer doesn't have express account. How will we arrange delivery for sample order?
Just provide your address information, we will check the express cost, and you can arrange the express cost together with sample value.
What are your payment terms?
We accept LC and T/T payment terms, depending on delivery and total amount. We can discuss details after receiving your requirements.
Do you provide free samples?
If you need several meters and we have stock of your size, we can provide samples with customer bearing the international express cost.
How do you guarantee the quality?
We have QC personnel responsible for tracking and monitoring the entire production process, and we welcome customer testing.
What are your working hours?
We respond to emails, phone calls, and online chat tools within 24 hours, including holidays.
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Fe-42Ni Alloy Strip 4J42 | Ultra-Thin Precision Strip | Controlled Oxidation Layer | Hermetic Packaging & Sensor Seals

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Product Detail
Brand Name :
OHMALLOY
Model Number :
4J42
Certification :
ISO，SGS
Place of Origin :
China(Shanghai)
MOQ :
10kg
Price :
negotiable
Contact Supplier
video
Fe-42Ni Alloy Strip 4J42 | Ultra-Thin Precision Strip | Controlled Oxidation Layer | Hermetic Packaging & Sensor Seals

Ohmalloy Material Co.,Ltd

Verified Supplier
11 Years
shanghai, shanghai
Since 2008
Business Type :
Manufacturer, Distributor/Wholesaler, Exporter, Trading Company
Main Products :
FeCrAl Alloy, Nickel Strip, Bimetallic Strip
Total Annual :
4000000-6000000
Employee Number :
20~50
Certification Level :
Verified Supplier
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