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| Categories | Low Expansion Alloy |
|---|---|
| Brand Name: | HUONA |
| Model Number: | 4J50 |
| Certification: | ISO 9001, SGS, RoHS |
| Place of Origin: | China |
| MOQ: | 5KG |
| Price: | NEGOTIATION |
| Payment Terms: | T/T |
| Supply Ability: | 10000KG /WEEK |
| Delivery Time: | A WEEK |
| Packaging Details: | Wooden case, steel strip bundling |
| Density: | 8.2 g/cm³ |
| Thermal Expansion (20–300°C): | 6.0 ×10⁻⁶/°C |
| Tensile Strength: | 450 MPa |
| Hardness: | HB 130–160 |
| Working Temp: | 60°C to 400°C |
| Surface: | Bright / Polished / Black |
| Tolerance: | As per ASTM / GB standard |
| Diameter: | 3 mm – 200 mm |
| Company Info. |
| Huona (Shanghai) New Material Co., Ltd. |
| Verified Supplier |
| View Contact Details |
| Product List |
4J50 alloy rod is a Fe-Ni controlled expansion alloy containing about 50% nickel.
It is widely used where a stable and low thermal expansion coefficient is required, especially for matching sealing with ceramics and certain glasses.
The alloy provides good machinability, weldability, and reliable sealing performance, making it suitable for electronic packaging, vacuum devices, and aerospace components.
Fe-Ni controlled expansion alloy
Stable and low thermal expansion coefficient
Excellent glass/ceramic sealing performance
Good processability and welding properties
Available in rods, wires, and customized forms
Glass-to-metal and ceramic-to-metal seals
Electronic packaging housings
Semiconductor device supports
Vacuum devices and relays
Aerospace instruments and precision devices
| Element | Content |
|---|---|
| Fe | Balance |
| Ni | ~50% |
| Mn, Si, C, etc. | Minor |
| Property | Typical Value |
|---|---|
| Density | ~8.2 g/cm³ |
| Thermal Expansion (20–300°C) | ~6.0 ×10⁻⁶/°C |
| Tensile Strength | ≥ 450 MPa |
| Hardness | HB 130–160 |
| Working Temp | -60°C to 400°C |
| Standard | GB/T, ASTM, IEC |
| 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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