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Phone Number : +86 18112628895
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Low Expansion Alloy 4J36 Invar 36 Curie Temperature 230°C

Place of Origin China
Brand Name XUNSHI
Certification ISO9001: 2015
Model Number 4J36
Minimum Order Quantity 50 kg
Price Negotiable
Packaging Details Plywood case
Delivery Time 30-35 days
Payment Terms T/T
Supply Ability 5000kg per week

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Product Details
Equal Grade Invar36, Nilo36, Pernifer36 Forms Of Supply Wire, Bar, Forging, Strip, Plate, Pipe
Sepc YB/T 5241-1993 Curie Point 230°C
Product Name Low Expansion Alloy Certification ISO9001
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Low Expansion 4J36 Invar 36


230°C 4J36 Invar 36

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Product Description

Low Expansion Alloy 4J36 Strip Wire Bar Curie Temperature 230°C


4J36 is well known as Invar36 worldwide. It is a Low Expansion Alloy with Curie point of around 230°C.Invar alloy (Invar 36) 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.

Chemical compositions

C ≤0.05
P ≤0.020
S ≤0.020
Si ≤0.30
Mn 0.2~0.6
Ni 35.0~37.0
Fe Balance

Smelting process

Usually used with non-vacuum induction furnace, vacuum induction furnace or arc furnace smelting


Equal Grades

Invar36, NILO 36, Pernifer36


Thermal treatment

Test samples specified in the standard are processed and heat treated according to the following process: heat semi-finished samples to 840 °C ± 10 °C, for 1 hour, water quenching, then processed into finished samples, heat preservation for 1 hour at 315 °C ± 10 °C for 1 hour, furnace cold or air cold.


Line expansion coefficient:



Physical performances



Curie Temperature: 230°C



Low expansions

Readily weldable

Corrosion resistance in the atmosphere, fresh water and sea water

Good hot and cold processing performance

Good abrasive performance



Cathode Ray Tubes


Aeronautical and aerospace engineering

Cryogenic engineering (liquefied natural gas tankers)


Forms of available

Wire, bar, forging, strip, plate, pipe, tube, capillary


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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.