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Invar36

Alloy 36 is a nickel-iron, low-expansion alloy containing 36% nickel. It maintains almost constant dimensions above normal room temperature, and has a low coefficient of expansion from cryogenic temperatures to about 260°C.
Alloy 36 retains good strength and toughness at cryogenic temperatures due to its low coefficient of expansion. It maintains nearly constant dimensions at temperatures below -150°C (-238°F) all the way up to 260°C (500°F) which is critical to cryogenics.
This alloy is produced by several companies all which have trademarked their own brand name, such as Invar 36® Alloy, Pernifer® 36, and NILO® 36.


Applications

composite molds for the aerospace industry
bimetal thermostats
clock balance wheels
containers and transfer lines for LNG tankers
echo boxes and filters for mobile telephones
electrical circuit breakers & transformers
electron gun components
high voltage transmission lines
laser components
magnetic shielding
radar and microwave cavity resonators
scientific instruments

Chemical Composition (weight %)
Fe Balance
Ni 36
Co 0.50
Mn 0.60
C 0.05
Si 0.40
P 0.015 max
S 0.015 max
Cr 0.25
Al 0.10
Mg 0.10
Zr 0.10
Ti 0.10

Mechanical Properties

Properties	Annealed Bars	Cold Drawn Bars
Tensile Strength	65ksi	90ksi
Yield Strength	40ksi	70ksi
Reduction in Area	65%	60%
Elongation in 2"	35%	20%
Hardness	70 HRB	90HRB

Specifications:
UNS K93600, K93601
Werkstoff Nr. 1.3912
ASTM B 388, ASTM B 753, DIN 1715 (Sheet and Strip)
ASTM F-1684
MIL-S-16598 and MIL-I-23011 CL 7
Trademarks - NILO 36 and INVAR 36
FeNi36