Nilo / Invar 36 8.0mm Dia Rod

Invar/Nilo Alloy 36

8.0mm dia Rod 
W.Nr 1.3912 UNS K93600 ;
cold drawn and annealed round bar
Controlled Expansion Alloy ; Glass Sealing Alloy ; Thermal Expansion Alloy ;
UK Stockist & Distributor , ship worldwide

Note : Contact us directly if you need larger quantity, custom cut lengths or lengths longer than those listed above. We will be happy to assist you.

Comparison: Invar vs. Other Metals (CTE)

This table shows how much a 1-meter rod expands with a $1\text{°C}$ rise in temperature:

Invar – Ultra-Low Thermal Expansion Alloy for Precision Applications

Invar is a nickel–iron alloy engineered for extremely low thermal expansion, making it the material of choice where dimensional stability is critical. It is widely used in aerospace composite tooling, including carbon fiber molds for aircraft programs such as the Boeing 787 and Airbus A350, ensuring accurate part geometry during high-temperature curing cycles.

In precision instrumentation, Invar maintains fixed distances in laser systems, metrology equipment, and seismic sensors, preventing thermal distortion that can compromise accuracy. It is also essential in scientific and optical equipment, including telescope mirror supports and electron microscope stages, where even microscopic movement can affect performance.

In telecommunications, Invar provides dimensional stability in RF waveguides and frequency-sensitive components. In energy and cryogenic applications, it is used in LNG carrier membrane tanks and high-capacity power transmission cables, where resistance to thermal contraction and expansion is vital for structural integrity and safety.

With its unmatched dimensional stability across extreme temperature ranges, Invar is a trusted solution for aerospace, scientific, energy, and high-precision industrial applications.