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Alloy K / Kovar   

Data Sheet

Alloy K / Kovar - Basic Chemical Composition

Typical Kovar composition

Weight % Ni Fe Co C Mn Si Al Cr Mg Zr Ti Cu Mo
Kovar Alloy K

29.0

53.0

17.0

0.04 max 0.50 max 0.20 max 0.10 max 0.20 max 0.10 max 0.10 max 0.10 max 0.20 max

0.20 max

Alloy K - Kovar available in : Round bar , Rod, Tube, Sheet, Strip, Plate, Wire.

 

Related Specifications

 and Registered Names

Kovar

Nicoseal

Nicosel

Rodar
Telcoseal
Sealvar
Alloy 29-17
Nilo K
Dilver
Pernifer 29-18

UNS K94610

ASTM F 15

AMS 7726,

AMS 7727,

AMS 7728.

MIL-I-23011 class 1.

Werkstoff Nr. 1.3981

DIN 17745

AFNOR NF A54-301

S.E.W. 385

 

A nickel-iron-cobalt controlled-expansion alloy containing 29% nickel. Its coefficient of expansion, which decreases with rising temperature to the inflection point, matches the expansion rate of borosilicate glasses and alumina ceramics.

Used for glass-to-metal seals in applications requiring high reliability or resistance to thermal shock. Examples are high-power transmitting valves, transistor leads and headers, integrated-circuit lead frames, and photography flash bulbs.

 

 

ASTM F15 Alloy STRIP
KOVAR STRIP  THICKNESS

.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 SHEET COLD ROLLED,
KOVAR SHEET
BRIGHT ANNEALED
MIL I 23011C, CL. 1


THICKNESS

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 Width X 72
.092 X Random Width X 72
.100 X Random Width X 72
.115 X Random Width X 72
.125 X Random Width X 72
OTHER SIZES AVAILABLE UPON REQUEST
 

ASTM F15 Alloy STRIP
KOVAR STRIP

.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 PLATE - HOT ROLLED
KOVAR PLATE
MIL I 23011C CLASS 1
NI/IRON/COBALT ALLOY

.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
OTHER SIZES ALSO AVAILABLE
OTHER SIZES AVAILABLE UPON REQUEST
 

ASTM F15 Alloy ROD / BAR / WIRE

KOVAR ROD / BAR / WIRE
CERTIFIED TO -196 DEGREES C
WITH NO PHASE TRANSFORMATION

DIAMETERS
.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
LARGER SIZES AVAILABLE UP TO 6" DIA.
OTHER SIZES AVAILABLE UPON REQUEST

 

Glass to Metal Tubing

TUBE SHAPES
Rounds, squares, triangles, rectangles, ovals, half-rounds, hexagons, and fluted rounds. Other configurations available upon request.

SIZE RANGE

Outside Diameter 0.020 in. to 6.000 in.

Wall Thickness 0.003 in. to 0.500 in.

LENGTHS

Exact cut lengths to 0.025 in. minimum

Mill lengths up to 20 ft.

Arbor wound coils on request.

TOLERANCES
Precision tolerances are normally one half of the commercial tolerances. Thousands of tool combinations permit us to ensure your most stringent tolerance needs.

QUALITY SPECIFICATIONS

MIL-I-45208A Inspection System

MIL-STD-45662A Calibration System

 

Disclaimer    

Every effort is made to ensure that technical specifications are accurate. However, technical specifications included herein should be used as a guideline only. All specifications are subject to change without notice.

 

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