Kovar Microwave Tube

Kovar Alloy Properties

(Also know as ASTM F-15, NILO K, Pernifer 2918, Rodar, and Dilvar P1)

Kovar Alloy Physical Properties
Density
lb/cu in
0.302
Specific Gravity  
8.36
Curie Temp
°F
815
 
°C
435
Melting Point
°F
2640
 
°C
1449
Electrical Resistivity
Micro-ohm-cm
40
 
Micro-ohm-cm
294
Thermal Conductivity
W/cm °C
0.17
 
BTU-in/sq. ft-hr-
120
Specific Heat
Cal/g- °C
0.11
 
BTU/lbm- °F
0.11
Thermal Expansion
ppm/°F
(75°F to 842°F)
2.9
 
ppm/°C
(25°C to 450°F)
5.3


Kovar Alloy Mechanical Properties
Tensile Strength
ksi
75
 
MPa
518
Yield Strength
ksi
40
 
MPa
276
Elongation
% in 2 in.
30
Typical Hardness Ann.
Rockwell
HRB 80
Modulus of Elasticity
Mpsi
30
 
kMPa
207


Kovar Alloy Chemistry
maximum % unless noted
Iron Bal
Nominal Nickel 29
Nominal Cobalt 17
Carbon 0.02
Silicon 0.20
Sulfur --
Chromium 0.20


Kovar Alloy Linear Coefficient of Thermal Expansion
Degree C   Degree C
30-100 --
30-450
5.1 - 5.5
30-150 --
30-475
--
30-200 5.5
30-500
6.2
30-250 --
30-525
--
30-300 5.1
30-550
--
30-325 --
30-600
7.9
30-350 --
30-700
9.3
30-375 --
30-800
10.4
30-400 4.6 - 5.2
30-900
11.5
30-425 --
30-1000
--

Buy Kovar Alloy Now

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. We carry:
• Invar (also known as Invar 36, Pernifer 36, and NILO 36)
• Super Invar
• 42 Alloy
• 42-6 Alloy
• 46 Alloy
• 48 Alloy
• 52 Alloy
We also have a large selection of Electronic Nickel grades such as
• 200
• 201
• 205
• 233
• 270

Buy Kovar Alloy Now