Invar Alloy Properties

(Also know as Invar 36, NILO 36, Pernifer 36, and Invar Steel)

Invar Alloy Physical Properties

Density
lb/cu in
0.291
Specific Gravity  
8.05
Curie Temp
°F
535
 
°C
279
Melting Point
°F
2600
 
°C
1427
Electrical Resistivity
Micro-ohm-cm
84
 
Micro-ohm-cm
495
Thermal Conductivity
W/cm °C
0.10
 
BTU-in/sq. ft-hr-
72.6
Specific Heat
Cal/g- °C
0.123
 
BTU/lbm- °F
0.123
Thermal Expansion
ppm/°F
(75°F to 842°F)
4.9
 
ppm/°C
(25°C to 450°F)
8.9


Invar Alloy Mechanical Properties

Tensile Strength
ksi
75
 
MPa
518
Yield Strength
ksi
40
 
MPa
276
Elongation
% in 2 in.
34
Typical Hardness Ann.
Rockwell
HRB 80
Modulus of Elasticity
Mpsi
20.5
 
kMPa
141


Invar Alloy Chemistry

maximum % unless noted
Iron Bal
Nominal Nickel 36
Nominal Cobalt 0.5
Carbon 0.05
Silicon 0.40
Sulfur 0.015
Chromium 0.25

 

Invar Alloy Linear Coefficient of Thermal Expansion

Degree C  
Degree C
30-100 0.8 - 1.6
30-450
8.5 - 9.2
30-150 --
30-475
--
30-200 1.3 - 2.1
30-500
9.7
30-250 --
30-525
--
30-300 4.92
30-550
--
30-325 --
30-600
11.4
30-350 6.2 - 7.0
30-700
12.7
30-375 --
30-800
13.5
30-400 7.8
30-900
13.9
30-425 --
30-1000
--

 


Ed Fagan Inc. also stocks a variety of similar alloys for low expansion, controlled expansion, glass-to-metal or ceramic sealing applications that may also satisfy your needs. EFI carries
• Kovar (ASTM F-15)
• 42 Alloy
• 42-6 Alloy
• 46 Alloy
• 48 Alloy
• 52 Alloy
and we also have a large selection of Electronic Nickel grades such as
• 200
• 201
• 205
• 233
• 270

Buy Invar Alloy Now