ASTM F15 Kovar Alloy 4J29 Iron Nickel Cobalt Plate/Sheet - 29% Nickel, 17% Cobalt Material for Electronic Sealing
Price:
$18-$35
MOQ:
50
Delivery Time:
7-21 days
Brand:
Victory
Product Description
ASTM F15 Kovar Alloy 4J29 Iron Nickel Cobalt Material
Precision alloy plate/sheet with controlled thermal expansion properties for electronic applications.
Product Overview
Kovar alloy 4J29 is a vacuum-melted iron-nickel-cobalt precision alloy containing 29% nickel, designed specifically for hermetic sealing applications in the electronics industry.
Key Features
- Controlled thermal expansion coefficient matching borosilicate glasses and alumina ceramics
- Excellent hermetic sealing properties for electronic components
- Wide application in power tubes, microwave tubes, transistors, and diodes
- Used in integrated circuits for flat pack and dual-in-line packaging
- Available in various tempers: soft, 1/4 hard, 1/2 hard, 3/4 hard, and full hard
Chemical Composition
| Element | Content (%) |
|---|---|
| Carbon (C) | Max 0.03 |
| Phosphorus (P) | Max 0.020 |
| Sulfur (S) | Max 0.020 |
| Manganese (Mn) | Max 0.50 |
| Silicon (Si) | Max 0.30 |
| Copper (Cu) | Max 0.20 |
| Chromium (Cr) | Max 0.20 |
| Molybdenum (Mo) | Max 0.20 |
| Nickel (Ni) | 28.5-29.5 |
| Cobalt (Co) | 16.8-17.8 |
| Iron (Fe) | Balance |
Material Specifications
| Property | Value |
|---|---|
| Density | 8.17 g/cm³ |
| Melting Point | 1449°C |
| UNS Number | K94610 |
| Werkstoff Number | 1.3981 |
Mechanical Properties
| Material Form | Soft | 1/4 Hard | 1/2 Hard | 3/4 Hard | Full Hard |
|---|---|---|---|---|---|
| Kovar Strip (N/mm²) | <570 | 520-630 | 590-700 | 600-770 | >700 |
| Kovar Wire (N/mm²) | <585 | 585-725 | 655-795 | 725-860 | >860 |
Thermal Expansion Coefficient
| Temperature Range (°C) | Expansion Coefficient (10⁻⁶/°C) |
|---|---|
| 20-200 | 5.9 |
| 20-300 | 5.3 |
| 20-400 | 5.1 |
| 20-450 | 5.3 |
| 20-500 | 6.2 |
| 20-600 | 7.8 |
| 20-700 | 9.2 |
| 20-800 | 10.2 |
Applications
Kovar 4J29 alloy is extensively used in glass-to-metal and ceramic-to-metal sealing applications across various industries:
- Avionics and precision instruments
- Electric vacuum industry components
- Electronic devices and semiconductor packaging
- Electric light sources and display technologies
Similar Products
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.
Company
Changzhou Victory Technology Co., Ltd
Location
NO.32 West Taihu Road, Xinbei District, Changzhou, Jiangsu
Contact Person
Victory