Invar 36 as also known as Nilo 36,UNS k93600, 36 Alloy, 36H(RUSSIA),Nilvar,Invar,Unipsan 36,Cactus LE(JAPAN), Invar Standard,Fe-Ni 36,Vacodil 36, Nilos 36, 36Ni,ASTM F1684, Chinese 4J36,WS 1.3912 etc. Note:
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°C. Invar 36 also retains good strength and toughness at cryogenic temperatures. Applications include standards of length, thermostat rods, laser components and tanks and piping for the storage and transportation of liquefied gasses.  Chemical Composition %

Alloy Grades	Chemical Composition %
	C	P	S	Mn	Si	Ni	Co	Fe
	Not more than（≤）
Invar36	0.05	0.020	0.020	0.20～0.60	0.30	35.0~ 37.0	-----	Balance

The Average Linear Expansion Coefficient:

Alloy Grades	Specimen heat treatment system	The average linear expansion coefficienta,10-6/ oC
		20-100 oC	20-300 oC
Invar36	To heat the semi-finishend products samples to  840±10°C,hold for 1h,and quench in the water. Machine the samples to finished samples.And heat At 315±10°C for 1h,furnace or air cool.	≤1.5	-----

   Alloy typical expansion coefficient

Alloy Grades	The average linear expansion coefficienta a,10-6/ oC
	20-50 oC	20-100 oC	20-200 oC	20-300 oC	20-400 oC	20-500 oC
Invar36	0.6	0.8	2.0	5.1	8.0	10.0

Note: The data in the tables are just for reference.