Invar, Invar 36, NILO 36 & Pernifer 36 / UNS K93600 & K93601 / W. Nr. 1.3912
Invar (also know as Invar 36, NILO 36, Pernifer 36 and Invar Steel) 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.
Chemistry By % Weight
Typical Mechanical Properties
Ultimate Tensile Strength 104,000 PSI
Yield Strength 98,000 PSI
Elongation @ Break 5.5
Modulus of Elasticity 21,500 KSI
Typical Physical Properties
Density 0.291 lbs/cu in
Melting Point 1425° C
Electrical Resistivity @ RT 8.2 Microhm-cm
Thermal Conductivity @ RT 10.15 W/m-k
Available Product Forms: Pipe, tube, sheet, plate, round bar, forging stock and wire.
Positioning devices • Bimetal thermostats • Advanced composite molds for aerospace industry • Dimensionally stable instruments and optical devices • Containers for LNG tankers • Transfer lines for LNG • Echo boxes and filters for mobile telephones • Magnetic shielding • Small electrical transformers • Metrology devices • Scientific instruments • Electrical circuit breakers • Temperature regulators • Clock balance wheels • Pendulum clocks • Precision condenser blades • Radar and microwave cavity resonators • Special electronic housings • Seals, spacers, and specialized frames • High voltage transmission lines • CRT applications: shadow masks, deflection clips, and electron gun components.