Kovar 4J29 Precision Alloy Round Bar Ni29Co18 K94610 - 8-200mm Diameter for Thermal Expansion Matching
Price:
10 - 499 kilograms $30.00
MOQ:
5 Kg
Delivery Time:
5-21 days
Brand:
Victory
Product Description
Product Overview
Kovar (Ni29Co18/4J29/K94610) precision alloy round bars offer exceptional dimensional stability with minimal thermal expansion changes. This makes them ideal for high-precision instruments, astronomical equipment, and precision machinery where maintaining dimensional accuracy across temperature variations is critical.
Key Features & Benefits
Dimensional Stability: Maintains precise dimensions during temperature fluctuations
Thermal Expansion Matching: Reduces material stress and mismatch issues
Excellent Workability: Available through hot or cold working processes
Superior Weldability: Easily connects with other materials
Custom Sizing: Manufactured in various diameters and lengths to meet specific application requirements
Alloy Specifications Comparison
| 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 | ASTMF1684 | √ | √ | √ | |
| FeNi27Co25 | Ceramvar | F1466 | ASTMF1466 | √ | √ | √ | √ |
| FeNi42 | Alloy 42 | K94100 | ASTM F30 | √ | √ | √ | |
| FeNi46 | Alloy 46 | K94600 | ASTM F30 | √ | √ | √ | |
| FeNi48 | Alloy 48 | K94800 | ASTMF30 | √ | √ | √ | |
| FeNi50 | Alloy 52 | K95050 | ASTM F30 | √ | √ | √ | √ |
Chemical Composition Analysis
| 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 Forms & 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: Custom made to specifications
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