Products
Eaton Alloys PTE LTD. was established in 2011 (as Eaton Alloys Limited) and has grown consistently over this time to become a specialized supplier for specialty metals widely used in oil a
Products
Singapore
Add.: 139 Bedok North Avenue 3, #10-188, Singapore 460139
Tel: 0065 9664 4411
Email:tonytay@eatonalloys.com
Web:www.eatonalloys.com
China
Add.: 489# Guanghua Dong 3rd Road, Chengdu, China, 610091
Tel: 0086 28 81703462
Email: sales@eatonalloys.com
Web: www.eatonalloys.com
KOVAR
Kovar/ASTM F15
Technical Data
Kovar (Alloy K) is 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. Kovar is used for glass-to-metal seals in applications requiring high reliability or resistance to thermal shock. Kovar is used for high-power transmitting valves, transistor leads and headers, integrated-circuit lead frames, and photography flash bulbs.
Chemical Composition (weight %)
Ni 29.0
Fe 53.0
Co 17.0
C 0.04 max
Mn 0.50 max
Si 0.20 max
Al 0.10 max
Cr 0.20 max
Mg 0.10 max
Zr 0.10 max
Ti 0.10 max
Cu 0.20 max
Mo 0.20 max
Mechanical Properties
Specifications
UNS K94610
Werkstoff Nr 1.3981
DIN 17745
ASTM F 15
AMS 7726 Wire
AMS 7727 Bars and Forgings
AMS 7728 Sheet, Strip and Plate
MIL-I-23011 class 1
Technical Data
Kovar (Alloy K) is 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. Kovar is used for glass-to-metal seals in applications requiring high reliability or resistance to thermal shock. Kovar is used for high-power transmitting valves, transistor leads and headers, integrated-circuit lead frames, and photography flash bulbs.
Chemical Composition (weight %)
Ni 29.0
Fe 53.0
Co 17.0
C 0.04 max
Mn 0.50 max
Si 0.20 max
Al 0.10 max
Cr 0.20 max
Mg 0.10 max
Zr 0.10 max
Ti 0.10 max
Cu 0.20 max
Mo 0.20 max
Mechanical Properties
Typical Tensile Strength (annealed) | 85 ksi |
Typical Tensile Strength (1/4Hard) | 90-115ksi |
Typical Tensile Strength (1/2Hard) | 105-125ksi |
Typical Tensile Strength (Hard) | 120ksi min |
Typical Hardness (Annealed) | 85 HRB max |
Typical Hardness (1/4Hard) | 90-93HRB |
Typical Hardness (1/2Hard) | 94-96HRB |
Elongation (Annealed) | 42% |
Specifications
UNS K94610
Werkstoff Nr 1.3981
DIN 17745
ASTM F 15
AMS 7726 Wire
AMS 7727 Bars and Forgings
AMS 7728 Sheet, Strip and Plate
MIL-I-23011 class 1