ASTM F15 Kovar Alloy Rods 4J29 - 29% Nickel 17% Cobalt Low Thermal Expansion Bars 8-200mm
Price:
10 - 499 kilograms $30.00
MOQ:
5 Kg
Delivery Time:
5-21 days
Brand:
Victory
Product Description
Kovar Alloy Rods & Bars Overview
Kovar alloy bars, also known as ASTM F15 Ferro Cobalt Nickel Base Alloy, are precision-engineered materials composed of approximately 29% nickel, 17% cobalt, and 53% iron. These specialized alloys are designed for applications requiring exceptional thermal expansion properties and dimensional stability across temperature variations.
Key Features & Applications
Matched thermal expansion coefficient with glass and ceramics
Excellent dimensional stability under thermal cycling
Reduced stress and mismatch issues in electronic packaging
Widely used in electronic component manufacturing and hermetic sealing
Available Alloy Types & 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 Specifications
| 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 | -- | -- | -- |
Available Sizes & Dimensions
Wire
0.5-7.5 mm diameter
Rod/Bar
8.0-200 mm diameter
Strip
(0.5-2.5) mm thickness × (5-180) mm width
Tube & Plate
Custom made to specifications
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Company
Changzhou Victory Technology Co., Ltd
Location
NO.32 West Taihu Road, Xinbei District, Changzhou, Jiangsu
Contact Person
Victory