AMS Resource, Inc. - Alloy, Metal & Steel Supplier

Invar 36, Invar 42 Nickel-Iron, Low-Expansion Alloy

Description

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 lack of expansion or contraction with temperature changes.

Also know as Invar 36, NILO 36, Pernifer 36, and Invar Steel, 9F, Free Cut Invar 36, Niron 36, Simalloy 36, Unispan 36, Nilbar, Unispan LR 35, Iron Nickel

Applications

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 leveling rods used are 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.

Invar 42 is used for glass-to-metal seals in electronic tubes, automotive and industrial lamps, transformer and capacitor bushings and other glass-to-metal and ceramic-to-metal applications.

Also know as Invar 36, NILO 36, Pernifer 36, and Invar Steel, 9F, Free Cut Invar 36, Niron 36, Simalloy 36, Unispan 36, Nilbar, Unispan LR 35, Iron Nickel

Invar 36 is a registered trade name of Carpenter Corp

Specifications

UNS# K93601 & K94100
F-1684 (Invar 36) Iron-Nickel and Iron-Nickel-Cobalt Alloys for Low Thermal Expansion Applications
F-30 (Invar 42) SPEC. FOR IRON-NICKEL SEALING ALLOYS
MIL-I-23011C (Invar 42) ( CLASS 1 ) IRON NICKEL ALLOYS FOR SEALING TO GLASSES & CERAMICS
MIL-S-16598B (Invar 36) STEEL BAR, LOW EXPANSION, FREE CUTTING, 36% NICKEL
MIL-STD-1276 (Invar 42) TYPE G ( LEADS FOR ELECTRONIC COMPONENT PARTS

Available Forms

  • Bar
  • Coil
  • Forge
  • Plate
  • Sheet
  • Strip
  • Tubes
  • Wire