All Products
-
Alfred***We received the goods, everything went fine. Perfect packaging, good product quality, good price - we are satisfied. -
May***The product quality is very good, beyond my expectations, the actual use of fully meet my needs, we will buy again. -
Matthew***I bought low expansion alloy from Joy, She is a very responsible lady, Huona's products quality is pretty good.
low expansion alloy 4J29 Kovar Alloy 0.05mm Thin Strip for Glass-to-Metal Sealing
| Place of Origin | Shanghai, China |
|---|---|
| Brand Name | ECER Alloy |
| Certification | ISO 9001:2015 |
| Model Number | 4J29-0.05 |
| Minimum Order Quantity | 50 Kilograms |
| Price | USD 30-80 / Kilogram |
| Packaging Details | Wooden case with moisture-proof packaging, export-grade protection |
| Delivery Time | 7-15 working days |
| Payment Terms | T/T,PayPal,Western Union |
| Supply Ability | 20000 Kilograms per Month |
Product Details
| Alloy Grade | 4J29 / Kovar / ASTM F-15 | Thickness | 0.05mm |
|---|---|---|---|
| Width | Customizable | Form | Strip / Foil |
| Composition | Fe-29Ni-17Co | Coefficient Of Thermal Expansion | 4.6-5.2 × 10⁻⁶ / °C (20-400°C) |
| Density | 8.36 G/cm³ | Tensile Strength | ≥ 520 MPa |
| Elongation | ≥ 25% | Melting Point | 1450°C |
| Highlight | Kovar 4J29 Controlled Expansion Foil,Glass-to-Metal Hermetic Sealing Strip,Electronic Packaging Low CTE Sheet |
||
Product Description
4J29 Kovar Low Expansion Alloy 0.05mm Thin Strip
The 4J29 Kovar alloy is a precision-engineered iron-nickel-cobalt low expansion alloy designed for critical glass-to-metal sealing applications. With a tightly controlled coefficient of thermal expansion (CTE) matching borosilicate glass and ceramic materials, this 0.05mm thin strip delivers exceptional hermetic sealing performance in electronic packaging, semiconductor devices, and transistor outline (TO) headers.
Key Features
- Controlled Thermal Expansion: CTE of 4.6-5.2 * 10⁻⁶ / °C (20-400°C), precisely matched to hard glass and alumina ceramics
- Ultra-Thin Gauge: 0.05mm thickness enables precision stamping and forming for miniaturized electronic components
- Excellent Hermetic Seal: Forms reliable, leak-tight glass-to-metal and ceramic-to-metal bonds
- Superior Formability: High elongation and ductility for deep drawing, punching, and bending operations
- Consistent Quality: Manufactured to ASTM F-15 standards with full traceability and mill test certificates
Typical Applications
- Transistor Outline (TO) headers and packages
- Hermetic relay housings and crystal oscillator bases
- Microwave tube and magnetron components
- Semiconductor lead frames and lids
- Aerospace electronic packaging and connectors
Specifications
| Alloy Grade | 4J29 / Kovar / ASTM F-15 |
| Composition | Fe-29Ni-17Co |
| Thickness | 0.05mm |
| Width | Customizable |
| Form | Strip / Foil |
| CTE (20-400°C) | 4.6-5.2 * 10⁻⁶ / °C |
| Density | 8.36 g/cm³ |
| Tensile Strength | ≥ 520 MPa |
| Elongation | ≥ 25% |
| Melting Point | 1450°C |
Why Choose Our 4J29 Kovar Strip?
As a specialized precision alloy manufacturer with ISO 9001:2015 certification, we produce 4J29 Kovar strip to the tightest dimensional tolerances with full chemical and physical property verification. Every batch undergoes CTE testing and surface quality inspection to ensure reliable sealing performance in your most demanding applications. Custom widths and slit tolerances available upon request.
Contact us today for a competitive quote, technical datasheet, or free sample evaluation.
Recommended Products
