UNS K94610 Nickel Iron Cobalt Alloy 4J29 Kovar Precision Tubes - 29% Nickel Content for Glass-to-Metal Sealing
Price:
10 - 499 kilograms $30.00
MOQ:
5 Kg
Delivery Time:
7-21 days
Brand:
Victory
Product Description
Product Overview
ASTM F15 Iron Nickel Cobalt Kovar alloy 4J29 Tubes - Glass sealed and controlled expansion Kovar alloys
Material Specifications
Kovar Alloy, also known as ASTM F-15, NILO K, Pernifer 2918, Rodar, and Dilvar P1 is Nickel-Iron-Cobalt controlled expansion alloy containing 29% Nickel.
Standard Designations
- Kovar alloy, ASTM F15, Nilo-K
- UNS K94610 (FeNi29Co17)
- Chinese 4J29
- Specifications: ASTM F15; DIN 17745; S.E.W. 385; Werkstoff Nr. 1.3981; AFNOR NF A54-301
Thermal Properties
The coefficient of expansion (which decreases with rising temperature to the inflection point) matches the expansion rate of borosilicate glasses and alumina ceramics.
Available Forms
| Alloy Type | Trade Name | UNS No. | Specifications | Rod | Strip | Wire | Sheet |
|---|---|---|---|---|---|---|---|
| Ni29Co17 | Kovar | K94610 | ASTM F15 | √ | √ | √ | √ |
| FeNi36 | Invar 36 | K93603 | ASTM 1684 | √ | √ | √ | |
| FeNi32Co5 | Super Invar 32-5 | KI93500 | ASTM F1684 | √ | √ | √ | |
| FeNi27Co25 | Ceramvar | F1466 | ASTM F1466 | √ | √ | √ | √ |
| FeNi42 | Alloy 42 | K94100 | ASTM F30 | √ | √ | √ | |
| FeNi46 | Alloy 46 | K94600 | ASTM F30 | √ | √ | √ | |
| FeNi48 | Alloy 48 | K94800 | ASTM F30 | √ | √ | √ | |
| FeNi50 | Alloy 52 | K95050 | ASTM F30 | √ | √ | √ | √ |
Chemical Composition
| Item | 1J33 | 3J01 | 3J9 | 4J29 | 4J32 | 4J33 | 4J45 | FeNi50 | Invar36 |
|---|---|---|---|---|---|---|---|---|---|
| C | ≤0.05 | ≤0.05 | 0.22-0.26 | ≤0.03 | ≤0.05 | ≤0.03 | ≤0.05 | ≤0.05 | ≤0.1 |
| Mn | ≤0.05 | ≤1.00 | 1.80-2.20 | ≤0.5 | 0.2-0.6 | ≤0.5 | ≤0.8 | ≤0.8 | ≤0.5 |
| Fe | Rest | ||||||||
| P | ≤0.020 | ≤0.020 | ≤0.03 | ≤0.02 | ≤0.02 | ≤0.02 | ≤0.02 | ≤0.02 | ≤0.006 |
| S | ≤0.020 | ≤0.020 | ≤0.020 | ≤0.02 | ≤0.02 | ≤0.02 | ≤0.02 | ≤0.02 | ≤0.04 |
| Si | 0.30-0.6 | ≤0.80 | 1.30-1.70 | ≤0.3 | ≤0.2 | ≤0.3 | ≤0.3 | ≤0.3 | ≤0.35 |
| Ni | 32.8-33.8 | 34.5-36.5 | 9.0-10.5 | 28.5-29.5 | 31.5-33 | 28.5-29.5 | 44.5-45.5 | 49.5-50.5 | 35-38 |
| Al | 1.0-2.0 | 1.00-1.80 | -- | -- | -- | -- | ≤0.1 | ≤0.1 | -- |
| Co | -- | -- | -- | 16.8-17.8 | 3.2-4.2 | 16.8-17.8 | - | - | - |
| Ti | - | 2.70-3.20 | - | - | - | - | - | - | - |
| Cu | - | -- | -- | -- | ≤0.2 | 0.4-0.8 | ≤0.2 | -- | -- |
| Cr | -- | 11.5-13.0 | 19.0-20.5 | ≤0.2 | -- | ≤0.2 | -- | -- | -- |
| Mo | -- | -- | 1.60-1.85 | ≤0.2 | -- | ≤0.2 | -- | -- | |
Industry Applications
Kovar (also known as KV-1 or ASTM F15) is a nickel-iron alloy that finds wide applications in the field of electronics due to its thermal expansion coefficient that matches that of borosilicate glass.
Key Application Areas
- Electronics Industry: Manufacture of vacuum tubes, cathode ray tubes (CRTs), microwave tubes, and other electronic components requiring high reliability and thermal shock resistance
- Aerospace Industry: Aircraft and spacecraft components requiring high thermal stability and dimensional stability
- Optical Industry: Optical filters, mirrors, and lenses requiring excellent thermal stability
- Automotive Industry: Sensors, switches, and electronic components requiring high dimensional stability
Applications include glass-to-metal seals in applications requiring high reliability or resistance to thermal shock, including high-power transmitting valves, transistor leads, heaters, and photography flash bulbs.
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Company
Changzhou Victory Technology Co., Ltd
Location
NO.32 West Taihu Road, Xinbei District, Changzhou, Jiangsu
Contact Person
Victory