Invar 36, Low Expansion Alloy

Common Trade Names: Invar 36, Nilo 36.

NS K93600, UNS K93603
Werkstoff 1.3912
EN 1.3912
ASTM F 1684 - 06
AFNOR NF A54-301 (chemistry only)

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.

Chemical Composition

Limiting Chemical Composition, % by Weight

Ni ……………………35-37

Fe …………………..Balance

Mo ………………….0.5 Max.

C ……………………0.1 Max.

Cu ………………….0.5 Max.

Mn …………………0.6 Max.

Si …………………..0.35 Max.

P ……………………0.025 Max.

S ……………………0.025 Max.

Cr …………………..0.5 Max.

Available Product Forms:

Pipe, tube, sheet, strip, plate, round bar, flat bar, forging stock and wire.