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

Controlled Expansion Alloys 4J6 For Vacuum Display Screen ASTMF31-16 42Ni-6Cr

Place of Origin China
Brand Name XUNSHI
Model Number 4J6
Minimum Order Quantity 300 kg
Price Negotiable
Packaging Details Plywood case
Delivery Time 30-35 days
Payment Terms T/T
Supply Ability 5000kg per week

Contact me for free samples and coupons.

WhatsApp:0086 18588475571

Wechat: 0086 18588475571

Skype: sales10@aixton.com

If you have any concern, we provide 24-hour online help.

Product Details
Certification ISO9001:2015 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
High Light

ASTMF31-16 Controlled Expansion Alloys


Vacuum Display Screen Expansion Alloys


Plate Controlled Expansion Alloys

Leave a Message
Product Description

Expansion Alloy 4J6 For The Vacuum Display Screen ASTMF31-16


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.


Chemical Composition(wt, %)

C P S Si Mn Al Ni Cr Fe
0.05 max 0.020 max 0.020 max 0.30 max 0.25 max 0.20 max 41.5-42.5 5.5-6.3 Rem


Equal Grades

  • H42X6(Russia)
  • 42Ni-6Cr ,Carpenter42-6 ,Sylvania4 ,Sealmet 4(USA)
  • NRS-1 ,YEF-426 ,SNC(Japan)
  • ASV(426) ,Ni42Cr6(France)
  • Vacovit426 ,NiCr426 (German)


Physical performance

Grade Heat treatment Mean line coefficient of expansion(10-6/°C)
20-300°C 20-400°C 20-450°C
4J6 Heat to 1100 °C ± 20 °C in a vacuum or hydrogen atmosphere and temperature insulation for 15 minutes, then cooling down to below 200 °C for no more than 5 °C / minutes 7.6-8.3 9.5-10.2 -





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


Available forms

Stip,Rod,pipe ,plate and tube



The alloy has stable performance and used by the aviation factories long term.It is mainly used to make various electric vacuum components, such as the anode cap of the electronic beam tube, the Vacuum display Screenand so on.

Controlled Expansion Alloys 4J6 For Vacuum Display Screen ASTMF31-16 42Ni-6Cr 0Controlled Expansion Alloys 4J6 For Vacuum Display Screen ASTMF31-16 42Ni-6Cr 1Controlled Expansion Alloys 4J6 For Vacuum Display Screen ASTMF31-16 42Ni-6Cr 2Controlled Expansion Alloys 4J6 For Vacuum Display Screen ASTMF31-16 42Ni-6Cr 3


Suzhou Xunshi New Material Co. Ltd- referred as XUNSHI hereafter, is a professional manufacturer of high-performance alloy products. XUNSHI is engaged in supplying high quality and cost-effective Superalloy, Anti-Corrosion Alloy, Precision Alloy, Special Stainless Steel and Magnetostrictive Material to customers worldwide.



· Highly experienced in alloy industry

· Top experts of industry in China

· Advanced technology and process from top famous institutes in China

· Advanced devices through whole production and inspection process

· Strict quality control system

· Company motto: best service, most value

· Smart sales policy


Service Items of XUNSHI

· Non-standard product research and pre-production

· Fabrication of products

· Cutting, splitting for sheets and plates in stock

· Heat treatment (Solution treatment, aging harden treatment, anneal, spring temper, quench etc.)

· Surface finish (peeling, gridding, polishing)

· Logistics service

· Customized packing service (also for exporting)

· Import and export (XUNSHI is certificated)

· Document translation

· Hard-to-find material sourcing


Customers of XUNSHI

Customers of XUNSHI are all over China (Taiwan and Hong Kong included). And we are exporting to USA, Canada, Italy, UK, Poland, Greece, Russia, Turkey, Iran, Israel, South Africa, South Korea, North Korea, India, Argentina, and Brazil and so on. Customers from 30+ countries trust us.


Where is XUNSHI

A- XUNSHI is in Huaqiao, Kunshan, 215332 China, which is very closed to Shanghai.

B- Xunshi is around 80KM from Shanghai Pudong International Airport (PVG).

C- 20KM from Shanghai Hongqiao Airport

D- 20KM from Shanghai Hongqiao Railway Station

E- You can contact XUNSHI sales for a pickup service.