Contact Platform Support
Help CenterKovar( 4J29) Hot Rolled Round Bar
Related Products
-
Kovar( 4J29) Hot Rolled Flat BarUS$ 10 - 30MOQ: 300 Kilograms -
Kovar( 4J29) Cold Drawn Round BarUS$ 10 - 30MOQ: 300 Kilograms
-
Kovar( 4J29) Round WireUS$ 10 - 30MOQ: 300 Kilograms
-
Kovar( 4J29) Cold Drawn PipeUS$ 10 - 30MOQ: 300 Kilograms
-
Kovar( 4J29) Cold Rolled StripUS$ 10 - 30MOQ: 300 Kilograms
Specifications
It has very low coefficient of heat expansion between the temperature of -250 and 200, good toughness and plasticProduct Description
Kovar alloy is a vacuum melted, iron-nickel-cobalt alloy that is widely used in the electronics industry. Kovar is a nickel-iron-cobalt, controlled-expansion alloy which contains 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 alloy has been used for making hermetic seals with the harder Pyrex glasses and ceramic materials. This alloy has found wide application in power tubes, microwave tubes, transistors, and diodes. In integrated circuits, it has been used for the flat pack and the dual-in-line package.
Chemical Composition
| Grade | C% | P% | S% | Mn% | Si% | Cu% | Cr% | Mo% | Ni% | Co% | Fe% |
| Kovar | Max 0.03 | Max 0.020 | Max 0.020 | Max 0.50 | Max 0.30 | Max 0.20 | Max 0.20 | Max 0.20 | 28.5-29.5 | 16.8-17.8 | Bal. |
Specifications
| Grade | UNS | Werkstoff Nr. |
| Kovar | K94610 | 1.3981 |
Physical Properties
| Grade | Density | Melting Point |
| Kovar | 8.17 g/cm3 | 1449°C |
Mechanical Properties
| Grade | Tensile Strength N/mm² | ||||
| Soft | 1/4 Hard | 1/2 Hard | 3/4 Hard | Full Hard | |
| Kovar Strip | <570 | 520-630 | 590-700 | 600-770 | >700 |
| Kovar Wire | <585 | 585-725 | 655-795 | 725-860 | >860 |
Coefficient of Expansion
| Alloy | Linear Coefficient of Thermal Expansion a,10-6/°C | |||||||
| 20-200°C | 20-300°C | 20-400°C | 20-450°C | 20-500°C | 20-600°C | 20-700°C | 20-800°C | |
| Kovar | 5.9 | 5.3 | 5.1 | 5.3 | 6.2 | 7.8 | 9.2 | 10.2 |
Send Inquiry to This Supplier
You May Also Like
-
Carbon Fiber Used for the Sewage and Water TreatmentNegotiableMOQ: 10 Kilograms
-
Low Price Q195 Q235 A36 Carbon Steel Wire Annealed WireUS$ 400 - 1000MOQ: 1 Ton
-
Brass Coated Steel Cord for Making Tyre 2*0.30mm Belt/ Steel Conveyor Belt Steel Cord /Tear-Resistant Dipped Steel Cord Fabric for Conveyor BeltUS$ 1 - 200MOQ: 10 Kilometers
-
Wodon A36 Steel Plate Super Wear-Resistant Chromium Carbide Overlay Coil Type Cutting Processing Services Meeting ANSI BSCHF 100 - 100MOQ: 1 Square Meter
-
O-type Fisheye Perforated Corrosion-resistant Alligator Mouth Anti-slip Welded Plate Grip Bracket Grid, Suitable for Outdoor WalkwaysUS$ 20 - 100MOQ: 1 Piece
-
Aluminium Foil /Lamination FoilUS$ 2,900 - 3,600MOQ: 20 Tons
-
GrilleNegotiableMOQ: 50 Pieces
-
Tungsten Heavy AlloyUS$ 1 - 1,000MOQ: 5 Kilograms
-
Nodulizer Re Fesimg Alloy From Anyang FactoryUS$ 1,230 - 2,000MOQ: 20 Tons
-
Model NO.SY2003-2 Drain Siphon (Desague Sifon)US$ 8 - 10MOQ: 1 Piece
