Nickel Iron Cobalt/Kovar

Nickel Iron Cobalt/Kovar

Kovar, also known as ASTM F 15 Alloy, is a controlled expansion alloy that is typically applied to high integrity glass and ceramic to metal seals, lids, lead frames and electronic package base. Kovar is made of nickel, cobalt and iron. This alloy is designed to adapt to computer, microwave, hydrid, semiconductor and space age technology demands, thus, making this an essential resource to the defenseaerospace and telecommunications industries. 

National Electronic Alloys requires stringent vacuum melting processes that yield the highest level of cleanliness and a more homogenous alloy.  We source our products from only the top quality mills and require they test the material to exceed industry standards. Our ASTM F15 alloy (Kovar©) is extremely stable, passing standard Phase transformation tests of  -80°C, and remain stable down to - 196°C.  

Your ASTM F15 alloy (Kovar©) supplier is just as important as the product and our experience on both the procurement side and supply side give us a unique insight into each customer’s specific needs. We are an ISO Certified Corporation.  All ASTM F15 alloy (Kovar©) products are DFARS Compliant and also in conformance with Section 1502 of the Dodd-Frank Wall Street Reform and Consumer Protection Act of 2010. If our products meet or exceed the standards of our nation’s Department of Defense, we’re confident that they’ll meet your standards, too.  Why take a chance on second rate material from another Kovar supplier when you can get the highest rated material in the industry from National Electronic Alloys? ASTM F15 alloy (Kovar©) is available in rods, sheets, coils and other forms. 

National Electronic Alloys has Kovar available immediately for your usability. Contact us at your convenience for pricing and order inquiries.


TYPICAL NOMINAL CHEMISTRY
NICKEL (Ni) 29.0
COBALT (Co) 17.0
MANGANESE(Mn) 0.50
SILICON (SI) 0.20
SULFUR (S) 0.025
CHROMIUM(Cr) 0.20
COPPER (Cu) 0.20
MOLYBDENUM (Mo) 0.20
ZIRCONIUM (ZR) 0.10
PHOSPHORUS (P) 0.025
CARBON (C) 0.06
IRON BALANCE


TYPICAL TENSILE STRENTGH
ANNEALED 85,000 MAX
1/4 HARD 90,000 TO 115,000
1/2 HARD 105,000 TO 125,000
HARD 120,000 MIN.


TYPICAL HARDNESS, ROCKWELL B
ANNEALED 85 MAX
1/4 HARD 90 TO 93
1/2 HARD 94 TO 96
National Electronic Alloys material is tested and certified to exceed industry standards on Phase Transformation, making it the most stable material available.


TYPICAL LINEAR COEFICIENT OF THERMAL EXPANSION
(cm per cm. C x 10-6)
30 to 100 N/A
30 to 200 5.5
30 to 300 5.1
30 to 350 N/A
30 to 400 4.9
30 to 425 N/A
30 to 450 5/3
30 to 500 6.2
30 to 550 N/A
30 to 600 7.9
30 to 700 9.3
30 to 800 10.4
30 to 900 11.5
30 to 1000 N/A
No Phase Transformation to -196°C
National Electronic Alloys material is tested and certified to exceed industry standards on Phase Transformation, making it the most stable material available.


ASTM F15 Alloy
(KOVAR) COIL THICKNESSES
.004 .0142 .045
.0045 .0145 .050
.005 .015 .059
.006 .020 .060
.007 .025 .062
.008 .030 .064
.0098 .035 .070
.010 .040 .082
.012 .043
ALL COIL SLIT TO YOUR WIDTH
OTHER SIZES AVAILABLE UPON REQUEST


ASTM F15 Alloy
(KOVAR)
SHEET COLD ROLLED, BRIGHT ANNEALED, MIL | 23011C, CL.1
TK WIDTHS LENGTH
.015
X
12,13,24"
X
72
.020
X
12,13,24"
X
72
.025
X
12,13,24"
X
72
.030
X
12,13,24"
X
72
.035
X
12,13,24"
X
72
.040
X
12,13,24"
X
72
.050
X
12,13,24"
X
72
.060
X
12,13,24"
X
72
.062
X
12,,24"
X
72
.072
X
12,,24"
X
72
.075
X
12,,24"
X
72
.080
X
12,,24"
X
72
.090
X
Random
X
72
.092
X
Random
X
72
.100
X
Random
X
72
.115
X
Random
X
72
.125
X
Random
X
72


ASTM F15 ALLOY
(KOVAR)
.004 x 12 x COIL .0125 x 12 x COIL
.0045 x 12 x COIL .0142 x 12 x COIL
.005 x 12 x COIL .0145 x 12 x COIL
.006 x 12 x COIL .015 x 12 x COIL
.007 x 12 x COIL .020 x 12 x 72
.008 x 12 x COIL .025 x 12 x 72
.0095 x 12 x COIL .030 x 12 x 72
.010 x 12 x COIL  
OTHER SIZES AVAILABLE UPON REQUEST


ASTM F15 ALLOY
(KOVAR)
MIL | 23011C CLASS 1
NI/IRON/COBALT ALLOY PLATE - HOT ROLLED
.150 x 15 x 72 .500 x 15 x 72
.164 x 15 x 72 .515 x 15 x 72
.187 x 15 x 72 .540 x 15 x 72
.210 x 15 x 72 .587 x 15 x 72
.235 x 15 x 72 .625 x 15 x 72
.250 x 15 x 72 .687 x 15 x 72
.260 x 15 x 72 .700 x 15 x 72
.281 x 15 x 72 .750 x 15 x 72
.312 x 15 x 72 .850 x 15 x 72
.320 x 15 x 72 .860 x 15 x 48
.375 x 15 x 72 .875 x 15 x 48
.390 x 15 x 72 1.00 x 15 x 31
.400 x 15 x 72 1.50 x 15 x 31
.425 x 15 x 72 2.00 x 15 x 24
.437 x 15 x 72


ASTM F15 Alloy
ROD (KOVAR)
CERTIFIED TO -196 DEGREES C
WITH NO PHASE TRANSFORMATION
.040 .187 .500 1.375
.050 .200 .562 1.500
.060 .203 .625 1.625
.062 .218 .750 1.750
.100 .250 .875 2.0
.125 .312 1.0 2.125
.156 .375 1.125 2.5
.178 .437 1.250 3.0

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