Alloy Strip Expansion Alloy 4J42 42H Glass Sealing 42 Nilo42 N42 FeNi42 K94100 Alloy 42

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Product Details


Product NameAlloy Strip Expansion Alloy 4J42 42H Glass Sealing 42 Nilo42 N42 FeNi42 K94100 Alloy 42
Product Description

Expansion alloy having a specific coefficient of thermal expansion, but also according to different uses require good sealing properties, weldability, corrosion resistance, workability and ease of machinability, and within the temperature range is not allowed to cause expansion characteristics significant changes in the phase transition. Expansion alloys in the manufacturing process must be accurate control of chemical composition of the alloy, and its products are generally rod, sheet, strip, wire and tube.



StripWidth=5mm-250mm, Thickness=0.1mm
FoilWidth=10mm-100mm, Thickness=0.01mm-0.1mm
BarWidth=8mm-100mm, Thickness=50mm-1000mm
Chemical Composition

Chemical Composition


 Grade C P S Mn Si Al Co Ni Fe
 4J42 ≤0.05 ≤0.02 ≤0.02 ≤0.8 ≤0.03 ≤0.1≤1.0  41.5-42.5 Balance
Product Features

 Product Features

GradeDensity (g/cm3)



Electrical resistivity at 20(Ωmm2/m)

Thermal Conductivity

λ/ W/(m*℃)

Curie Point   

(Tc/ ℃)

Elastic Modulus

  (E/ Gpa)

4J428.12 350.6114.6360147


Coefficient Of Expansion



The Heat Treatment Process


Heated to 900 ±20℃ in a hydrogen atmosphere

Holding Time

1 hour


With speed not more than 5 ℃ / min. cooling to below 200 ℃


Strip Tensile Strength

StatusTensile Strength(N/mm2)
Packaging & Shipping


Why Choose Us

 why choose uswps.jpg



Q1: What is the MOQ?

A1: Any quantity you need when the sizes are in stock.
Wire diameter<0.1mm, it is 1kgs
Wire diameter 0.1~0.3mm, it is 2~3kgs
Wire diameter 0.3~0.7mm, it is 5kgs
Wire diameter 0.7-1.2mm, it is 10kgs
Wire diameter >1.2mm, it is 20-25kgs
For strip,smaller size, it is 10-20kgs
Larger size, it is 50-100kgs


Q2: Can you offer free samples?

A2: Yes,when the same sizes or the close sizes are in stock. 


Q3: What’s the payment terms?

A3: We accept T/T, L/C, Paypal etc. It can be negotiated when the amount is different.


Q4: What is the standard of the material?

A4: Nichrome alloy and FeCrAl alloy is supplied according to Chinese standard GB/T 1234-2012. The standard for CuNi alloy is GB/T6145-1999,GB/T9502-1999.
But We can add metal elements according to the standard of different countries as per the user’s requirements.


Q5: Are you trading company or manufacturer?

A5: We are factory.