Shop No.1, Shivtirth Building, 10/12, Sindhi Lane, Mumbai - 400004.
Kovar Welding Rods
What is Kovar Welding Rod ?
Kovar Welding Rods are specialized filler metals made from a nickel-iron alloy with controlled expansion properties. These rods are well-known for their superior glass and ceramic sealing abilities making them perfect for demanding applications where thermal stability is crucial. At Parag Metals, we supply high-quality Kovar Welding Rods designed to meet the demands of industries that rely on precision and thermal performance.
These rods are generally composed of nickel (~29%), cobalt (~17%), and iron. They come in lengths up to 1000mm and diameters ranging from 0.5mm to 3.0mm. They provide good wetting, minimum spatter, and smooth flow when used with TIG and MIG welding processes. Kovar rods are suitable for joining components that experience thermal cycling without risking cracks or seal failures.
Table of Content
- Advantages of Kovar Welding Rod
- Uses of Kovar Welding Rod
- Specification of Kovar Welding Rod
- Available Types of Kovar Welding Rod
- Kovar Welding Rod Equivalent Grades
- Chemical Composition of Kovar Welding Rod
- Kovar Welding Rod Mechanical Properties
- Kovar Welding Rod Size, Thickness Chart
- Application Industries of Kovar Welding Rod
- Export Countries for Kovar Welding Rod
Kovar Welding Rods, Kovar Welding Rods Supplier In India, Kovar Welding Rods Distributor, Kovar Welding Rods Stockist, Kovar Welding Filler Rod, Kovar Welding Electrode.
Industries that require tight dimensional stability trust Kovar rods for tasks such as sealing glass-to-metal joints, sensor housings, and precision electronics. They’re widely used in aerospace, defense, vacuum systems, and medical instruments. Whether it’s hermetic sealing in electrical connectors or assembling critical instrumentation parts, these rods ensure strong, reliable welds.
We perform batch-level testing to verify size, composition, and surface quality. Each shipment includes traceable documentation for customer assurance. For engineers and procurement heads looking for a reliable Kovar Welding Rods supplier in India, we offer prompt service, flexible packaging, and dependable quality, built for long-term performance.
Advantages of Kovar Welding Rod
- Excellent thermal expansion compatibility with glass and ceramics.
- Good weldability and mechanical stability during fabrication.
- Maintains strength and toughness across a wide temperature range.
- Reliable for vacuum-sealed and hermetic applications.
- High dimensional stability for precision components.
Uses of Kovar Welding Rod
- Electrical and electronic components requiring hermetic sealing.
- Glass-to-metal and ceramic-to-metal seals in vacuum systems.
- Semiconductor and microelectronic packaging.
- Aerospace and defense instrumentation.
- Medical equipment and scientific devices exposed to varying temperatures.
Specification of Kovar Welding Rod
| Standard | AWS A5.14 ERNiFe-Co, ASME SFA 5.14 |
|---|---|
| International Specifications | DIN, BS, JIS, ASTM WERKSTOFF NR 2.3070, EN NiFe29Co17 |
| Size | 1.6 mm, 2.0 mm, 2.5 mm, 3.15 mm, 4.0 mm, 5.0 mm Dia. |
| Length | 250 mm, 300 mm, 350 mm, 400 mm, 450 mm |
| Type | Welding Electrode, Arc Welding Rods, Tig Welding Rods |
Available Types of Kovar Welding Rod
Kovar Welding Electrode
Kovar ARC Welding Rods
Kovar TIG Welding Rods
Kovar Welding Rod Equivalent Grades
| STANDARD | WERKSTOFF NR. | UNS | JIS | EN |
|---|---|---|---|---|
| Kovar | 2.3020 | N04400 | NW 4400 | NiFe29Co17 |
Chemical Composition Of Kovar Welding Rod
| Grade | Ni | Fe | Co | Mn | Si | C | S |
|---|---|---|---|---|---|---|---|
| Kovar | 29 | 17 | 54 | 0.25 max | 0.25 max | 0.05 max | 0.03 max |
Kovar Welding Rod Mechanical Properties
| Element | Density | Melting Point | Tensile Strength | Yield Strength (0.2% Offset) | Elongation |
|---|---|---|---|---|---|
| Kovar | 8.36 g/cm³ | 1450 °C (2642 °F) | 450–620 MPa (65–90 ksi) | 275 MPa (40 ksi) | 22–30 % |
Kovar Welding Rods Sizes
| Rod Diameter (mm) | Rod Diameter (inch) | Typical Length (mm) |
|---|---|---|
| 2.0 | 5/64″ | 300 – 450 |
| 2.5 | 3/32″ | 300 – 450 |
| 3.15 | 1/8″ | 300 – 450 |
| 4.0 | 5/32″ | 300 – 450 |
| 5.0 | 3/16″ | 300 – 450 |
| 6.3 | 1/4″ | 300 – 450 |
Thickness Chart of Kovar Welding Rod
| Rod Diameter (mm) | Approx. Weight per 100 Rods (kg) | Approx. Weight per Rod (g) | Approx. Weight per Meter (kg/m) |
|---|---|---|---|
| 2.0 | 1.6 – 1.8 | 16 – 18 | 0.025 – 0.028 |
| 2.5 | 2.5 – 2.8 | 25 – 28 | 0.049 – 0.053 |
| 3.15 | 4.8 – 5.2 | 48 – 52 | 0.079 – 0.085 |
| 4.0 | 8.5 – 9.0 | 85 – 90 | 0.126 – 0.132 |
| 5.0 | 13.0 – 14.0 | 130 – 140 | 0.196 – 0.210 |
| 6.3 | 18.0 – 20.0 | 180 – 200 | 0.282 – 0.314 |
Application Industries of Kovar Welding Rod
Export Countries for Kovar Welding Rod
- ASIA – China, Thailand, Singapore, Sri lanka, Bangladesh, Japan, Philippines, Vietnam, Nepal, Bhutan
- Middle East – Kuwait, Dubai, Saudi Arabia, Qatar, Oman, Bahrain, Jordan
- Europe – United Kingdom, Italy, Belgium, France, Croatia, Spain, Germany, Russia, Denmark
- South America – Argentina, Chile, Brazil, Colombia, Paraguay
- Africa – Ghana, South Africa