Huona (Shanghai) New Material Co., Ltd.
| Payment Terms | T/T |
| Supply Ability | 1000kg Per Week |
| Delivery Time | WEEK |
| Packaging Details | 1500tons/Year |
| Model NO. | Expansion Alloy |
| Transport Package | DIN Spool, Carton, Wooden Case |
| HS Code | 7505220000 |
| Purity | Alloy |
| Production Capacity | 1500tons/Year |
| Origin | Jiangsu, China |
| Coefficient of Expansion | 5.0 × 10⁻⁶ /°C (30–400°C~) |
| Surface Finish | Bright, Cold-Rolled, Ground, or Annealed Matte |
| Brand Name | HUONA |
| Model Number | PLATE |
| Certification | ISO9001 |
| Place of Origin | CHINA |
View Detail Information
Explore similar products
AZ31 Magnesium Alloy MIG Welding Wire 2mm Bright Surface
Polish Surface Nickel Alloy Inconel 600 Round Bar
Glass Sealing Alloy Wire 4J28 Fe-Ni Alloy Wire Soft Magnetic Material
High Precision 4J29 Alloy Wire For Fe-Ni-Co Wire Kovar Type Sealing Alloy
Product Specification
| Payment Terms | T/T | Supply Ability | 1000kg Per Week |
| Delivery Time | WEEK | Packaging Details | 1500tons/Year |
| Model NO. | Expansion Alloy | Transport Package | DIN Spool, Carton, Wooden Case |
| HS Code | 7505220000 | Purity | Alloy |
| Production Capacity | 1500tons/Year | Origin | Jiangsu, China |
| Coefficient of Expansion | 5.0 × 10⁻⁶ /°C (30–400°C~) | Surface Finish | Bright, Cold-Rolled, Ground, or Annealed Matte |
| Brand Name | HUONA | Model Number | PLATE |
| Certification | ISO9001 | Place of Origin | CHINA |
| High Light | 4J29 Kovar ASTM F15 Sealing Alloy Sheet ，Glass-to-Metal Sealing Precision Plate ，Kovar Controlled Expansion Sheet Material | ||
| Attribute | Value |
|---|---|
| Model NO. | Expansion Alloy |
| Transport Package | DIN Spool, Carton, Wooden Case |
| HS Code | 7505220000 |
| Purity | Alloy |
| Production Capacity | 1500tons/Year |
| Origin | Jiangsu, China |
| Coefficient of Expansion | 5.0 × 10⁻⁶ /°C (30–400°C~) |
| Surface Finish | Bright, Cold-Rolled, Ground, or Annealed Matte |
4J29 alloy sheet, also known internationally as Kovar alloy (UNS K94610, ASTM F15), is a nickel-iron-cobalt alloy with controlled thermal expansion characteristics. It is widely used in hermetic sealing applications due to its precisely matched coefficient of expansion with hard glass and ceramics.
The alloy maintains dimensional stability across a wide temperature range, making it ideal for use in electronic components requiring tight tolerances and vacuum integrity. Typical applications include glass-to-metal seals in transistors, vacuum tubes, integrated circuits, microwave packages, and optical housings.
Available in cold-rolled or annealed condition, 4J29 sheets offer excellent workability, uniform grain structure, and high surface finish for precision forming and sealing processes.
| Element | Content (%) |
|---|---|
| Nickel (Ni) | 29.0 ± 1.0 |
| Cobalt (Co) | 17.0 ± 1.0 |
| Iron (Fe) | Balance |
| Silicon (Si) | ≤ 0.3 |
| Manganese (Mn) | ≤ 0.5 |
| Carbon (C) | ≤ 0.05 |
| Chromium (Cr) | ≤ 0.2 |
| Phosphorus (P) | ≤ 0.015 |
| Sulfur (S) | ≤ 0.015 |
| Aluminum (Al) | ≤ 0.1 |
| Copper (Cu) | ≤ 0.2 |
| Property | Typical Value |
|---|---|
| Tensile Strength | ≥ 450 MPa |
| Yield Strength | ≥ 300 MPa |
| Elongation (L=50 mm) | ≥ 20% |
| Hardness (HV) | ≤ 200 HV |
| Density | 8.3 g/cm³ |
| Coefficient of Expansion | 5.0 × 10⁻⁶ /°C (30-400°C~) |
| Melting Range | 1450 - 1500°C |
| Electrical Resistivity | ~0.42 μΩ*m |
| Item | Details |
|---|---|
| Thickness Range | 0.05 mm - 5.0 mm (custom sizes available) |
| Width | Up to 600 mm (slit widths available) |
| Length | Up to 3000 mm (or coils upon request) |
| Surface Finish | Bright, Cold-Rolled, Ground, or Annealed Matte |
| Tolerance | Thickness: ±0.01 mm; Width: ±0.5 mm (custom precision available) |
| Delivery Condition | Annealed / Stress Relieved / Pickled |
| Packaging | Vacuum sealed + export wooden case; rust-preventive wrap included |
| Certification | ISO 9001 / Material Certificate (EN 10204 3.1/3.2) / RoHS / REACH |
| Country of Origin | China (OEM support available) |
Company Details
Business Type:
Manufacturer,Exporter
Year Established:
2008
Total Annual:
8000000-100000000
Employee Number:
100~120
Ecer Certification：
Verified Supplier
Huona (Shanghai) New Material Co., Ltd. Was established in 2008, currently have three divisions: Magnesium Division, Thermal Spray Division and Functional Material Division.Magnesium Division produces magnesium metal products. Various models of high-quality magnesium alloy plate, magnesium rods, hig... Huona (Shanghai) New Material Co., Ltd. Was established in 2008, currently have three divisions: Magnesium Division, Thermal Spray Division and Functional Material Division.Magnesium Division produces magnesium metal products. Various models of high-quality magnesium alloy plate, magnesium rods, hig...
Get in touch with us
Leave a Message, we will call you back quickly!