Super Invar nickel iron alloy Invar36/ 36h Bright Strip 1.5X120mm for Solar Module Shell

INVAR 36

INVAR 36 is a nickel-iron, low expansion alloy containing 36% nickel. It maintains nearly constant Dimensions Over the range of normal atmospheric temperatures, and has a low coefficient of expansion from cryogenic temperatures to about 500° F. The alloy also retains good strength and toughness at cryogenic temperatures.

INVAR 36 can be hot and cold formed and machined using processes similar to

austenitic stainless steels. INVAR 36 is weldable using Filler Metal CF36 which is

available in bare wire for both the GTAW and GMAW process.

Chemical composition

physical properties

INVAR, also known generically as FeNi36 (64FeNi in the US), is a nickel-iron alloy notable for its uniquely low coefficient of thermal expansion (CTE or α).

The name Invar comes from the word invariable, referring to its relative lack of expansion or contraction with temperature changes.

It was invented in 1896 by Swiss physicist Charles Édouard Guillaume. He received the Nobel Prize in Physics in 1920 for this discovery, which enabled improvements in scientific instruments.
Invar 36 is used where high dimensional stability is required, such as precision instruments, clocks, seismic creep gauges, television shadow-mask frames, valves in motors, and antimagnetic watches. In land surveying, when first-order (high-precision) elevation leveling is to be performed, the Level staff (leveling rod) used is made of Invar, instead of wood, fiberglass, or other metals. Invar struts were used in some pistons to limit their thermal expansion inside their cylinders.

Coefficient of expansion

Typical Mechanical properties

Temperature factor of Resistivity

Shanghai Tankii Alloy Material Co., Ltd.specialized in production of Resistance Heating Alloy, Nickel Chromium Alloy, Iron Chromium Aluminum Alloy, Nickel Aluminum Alloy, Manganin, Copper Nickel Alloy, thermocouple wire, pure nickel and other precision alloy materials in the form of round wire, ribbon wire, sheet, tape, strip, rod and plate.

We’ve already got ISO9001 quality system certificate and approval of ISO14001 environmental protection system.

We own a complete set of advanced production flow of refining, cold reduction, drawing and heat treating etc. We also proudly have independent R&D capacity.

Shanghai Tankii Alloy Material Co., Ltd has accumulated lots of experiences over forty years in this field. During forty years, hundreds of management elites and high science and technology talents were employed.They participated in every walk of the company life, which make our company keep blooming and invincible in the competitive market.

Based on the principle of “first quality, sincere service”, our managing ideology is pursuing technology innovation and creating the top brand in the alloy field. We persist in Quality - the foundation of the survival. It is our forever ideology to serve you with full heart and soul. We committed to provide customers all over the world with high-quality, competitive products and perfect service.

Our products, such us nichrome wire, nichrome strip, fecral wire, fecral strip, thermocouple wire, nickel wire, nickel strip have been exported to Europe, USA, India, Southest Asia, South America,etc.

We are willing to establish strong and long-time partnership with our customers

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