• Daniel Weree
    Have been business relationship for 3 years, great partner for Nickel Cobalt Alloy!
  • Carolina Fasio
    On-time delivery. And support is good and fast.
Contact Person : Allen Sun
Phone Number : +86 18112628895
WhatsApp : +8618112628895

4J6 Fe-Ni-Cr Glass Sealing Alloy Plate Expansion

Place of Origin China
Brand Name XUNSHI
Certification ISO9001
Model Number 4J6
Minimum Order Quantity 300kg
Price Negotiable
Packaging Details Plywood case
Delivery Time 30-35 days
Payment Terms T/T
Supply Ability 5000kg per week
Product Details
Equal Grade 42Ni-6Cr ,Carpenter42-6 ,Sylvania4 ,Sealmet Forms Of Supply Strip, Plate, Rod,pipe, Tube
Sepc YB/T 5253-2005,ASTMF31-16(Glass Sealing 42-6) Density 8.11g/cm3
Product Name Expansion Alloy Certification ISO9001
High Light

Expansion Alloy 4J6


42Ni-6Cr Controlled Expansion Alloys


4J6 Glass Sealing Alloy

Leave a Message
Product Description

4J6 Fe-Ni-Cr Glass Sealed Alloy Plate


4J6 is a typical glass sealing alloy, the coefficient of expansion is similar to the soft glass in the temperature range of 20~400℃. The alloy contains 6% chromium, and after oxidation treatment the alloy surface produces a very dense oxide membrane that is strongly bound to the substrate and well infiltrated with the soft glass, so that can get high strength sealing surface.


The alloy is an important sealing structure material in the electric vacuum industry, In addition, the alloy contains 42% nickel, that is why the US label is called 42Ni-6Cr (Glass sealing 42-6, UNSK94760).American Carpenter also produced the alloy that called Carpenter 42-6.


Equal Grades

Grade Russia America Japan France







Sealmet 4







Chemical composition(%)

Grade C P S Mn Si Al Ni Cr Fe
4J6 ≤0.05





≤0.20 41.5~42.5 5.40~6.30 Balance



≤0.07 ≤0.025 ≤0.025 ≤0.25 ≤0.30 ≤0.20 41.0-43.0 5.0-7.0 Balance


Density: 8.11g/cm3

Standards: ASTMF31-16(Glass sealing 42-6),YB/T 5253-2005



4J6 alloy is glass sealed alloy FeNiCr departments on behalf of the brand.The alloy via air factory use for a long time, stable performance.Mainly used for making all kinds of electric vacuum components, such as electronic tube anode caps, etc.That should be chosen in the application of matching expansion coefficient of glass and metal.In order to improve the sealing strength of metal and glass allows alloy containing aluminum, cerium.When the heat treatment, grain size is too big, should be avoided to ensure the strip with good deep drawing extension performance and air tightness.



The available forms

Stip,Rod,pipe ,plate, tube and so on.


Our 4J6 precision strips were exported to the United States to a well-known air headphones and hearing aid manufacturer. The product quality was won the trust of international customers.

4J6 Fe-Ni-Cr Glass Sealing Alloy Plate Expansion 04J6 Fe-Ni-Cr Glass Sealing Alloy Plate Expansion 1

4J6 Fe-Ni-Cr Glass Sealing Alloy Plate Expansion 24J6 Fe-Ni-Cr Glass Sealing Alloy Plate Expansion 3