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4J46 Rod Controlled Expansion Alloy Bar Fe Ni Alloy for Glass and Ceramic Sealing
| Place of Origin | China |
|---|---|
| Brand Name | HUONA |
| Certification | ISO 9001, SGS, RoHS |
| Model Number | 4J46 |
| Minimum Order Quantity | 5KG |
| Price | negotiation |
| Packaging Details | Wooden case, steel strip bundling |
| Delivery Time | 1 week |
| Payment Terms | T/T |
| Supply Ability | 10000kg/week |
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xProduct Details
| Density | ~8.2 G/cm³ | Thermal Expansion (20–400°C) | ~5.0 ×10⁻⁶/°C |
|---|---|---|---|
| Tensile Strength | ≥ 450 MPa | Hardness | ~HB 130–160 |
| Working Temp | -196°C To 450°C | Standard | GB/T, ASTM, IEC |
| Tolerance | As Per ASTM / GB Standard | Packaging | Wooden Case, Steel Strip Bundling |
| Highlight | Glass sealing controlled expansion alloy bar,4J46 Alloy Controlled Expansion Alloy bar,Ceramic sealing controlled expansion alloy bar |
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Product Description
Product Description
4J46 alloy rod is a Fe-Ni controlled expansion alloy with about 46% nickel, designed for glass-to-metal and ceramic-to-metal sealing applications. Its thermal expansion coefficient matches that of hard glass and ceramics, ensuring excellent hermetic sealing and reliability.
This alloy features stable expansion characteristics, good machinability, and high sealing performance, making it widely applied in semiconductor packaging, vacuum tubes, relays, sensors, aerospace devices, and precision electronic components.
Key Features
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Fe-Ni controlled expansion alloy (Ni ~46%)
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Excellent sealing with ceramics and hard glass
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Reliable thermal expansion stability
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Good machinability and polishability
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Supplied in rods, wires, sheets, customized forms
Typical Applications
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Glass-to-metal sealing
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Ceramic-to-metal sealing
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Semiconductor packaging bases
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Relays, sensors, vacuum tubes
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Aerospace and defense electronic devices
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Hermetic sealing in precision instruments
Chemical Composition (%)
| Element | Content |
|---|---|
| Fe | Balance |
| Ni | ~46% |
| Mn, Si, C, etc. | Minor |
Physical and Performance Properties
| Property | Typical Value |
|---|---|
| Density | ~8.2 g/cm³ |
| Thermal Expansion (20–400°C) | ~5.0 ×10⁻⁶/°C |
| Tensile Strength | ≥ 450 MPa |
| Hardness | ~HB 130–160 |
| Working Temp | -196°C to 450°C |
| Standard | GB/T, ASTM, IEC |
Available Specifications
| Item | Range |
|---|---|
| Diameter | 3 mm – 200 mm |
| Length | ≤ 6000 mm |
| Tolerance | As per ASTM / GB standard |
| Surface | Bright / Polished / Black |
| Packaging | Wooden case, steel strip bundling |
| Certification | ISO 9001, SGS, RoHS |
| Origin | China (OEM/ODM service available) |
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