• 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

Invar Tube ASTM F 1684 Controlled Expansion Alloy Low Thermal Expansion Alloy

Place of Origin China
Brand Name XUNSHI
Certification ISO 9001:2015
Model Number Invar
Minimum Order Quantity 20 kg
Price Negotiable
Packaging Details Plywood crate
Delivery Time 60 days
Payment Terms T/T
Supply Ability 100 kg per week

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WhatsApp:0086 18588475571

Wechat: 0086 18588475571

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Product Details
Equal Grades Invar 36, NILO 36, Pernifer 36, 4J36, EN 1.3912, UNS K93600, UNS K93603, Werkstoff 1.3912 Spec ASTM F1684
Material FeNi Alloy Forms Of Supply Sheet, Strip, Wire, Rod, Bar, Tube, Capillary
Size Rang O.D. Φ0.2~Φ8mm
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ASTM F1684 invar tube


FeNi alloy invar tube


8mm invar tube

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Product Description

Size range of Invar tubing

Dimension: O.D.: Φ0.2~Φ8mm, wall thickness 0.015~0.5mm.
Tolerance: O.D.: Φ±0.003mm, wall thickness T±0.005mm, length L±0.05mm.


Invar is a low expansion alloy consisting of 36% Nickel, balance Iron. Invar Alloy exhibits extremely low expansion around ambient temperatures, making Invar Alloy particularly useful in applications where minimum thermal expansion and high dimensional stability is required, such as in precision instruments like optoelectronic devices, optical and laser benches, electronics, and other kinds of scientific instruments.

Low expansion rate up to 500°F
Readily weldable

Cathode Ray Tubes
Other application areas, such as telecommunications, aeronautical and aerospace engineering, cryogenic engineering (liquefied natural gas tankers) etc., require either high dimensional stability with variation in temperature, or expansion characteristics matched with those of other materials, such as glass, ceramics, or composites.

Equal grades

  • Invar 36
  • NILO 36
  • Pernifer 36
  • 4J36
  • EN 1.3912
  • UNS K93600
  • UNS K93603
  • Werkstoff 1.3912

Chemical composition
Ni=35.0~37.0, Fe=Remainder, Mo≤0.50, C≤0.1, Cu≤0.5, Mn≤0.60, Si≤0.35, P≤0.025, S≤0.025, Cr≤0.5

ASTM F 1684-06

Forms available at XUNSHI
Sheet, strip, wire, rod, bar, tube, capillary
Invar Tube ASTM F 1684 Controlled Expansion Alloy Low Thermal Expansion Alloy 0Invar Tube ASTM F 1684 Controlled Expansion Alloy Low Thermal Expansion Alloy 1Invar Tube ASTM F 1684 Controlled Expansion Alloy Low Thermal Expansion Alloy 2Invar Tube ASTM F 1684 Controlled Expansion Alloy Low Thermal Expansion Alloy 3Invar Tube ASTM F 1684 Controlled Expansion Alloy Low Thermal Expansion Alloy 4


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.