ESAB OK 84.78 Hardfacing Electrode
ESAB OK 84.78 is a high-performance hardfacing electrode designed for surfacing worn parts exposed to severe abrasion and impact. It produces a weld metal rich in coarse chromium carbides, set in an austenitic matrix, providing excellent wear resistance. Classified as E Z Fe14 under EN 14700, this electrode is ideal for applications involving earth-moving equipment, such as sand pumps, mixers, feed screws, and crushers. It is particularly effective in environments with exposure to coal, ores, and other minerals, even in corrosive and high-temperature conditions.
**ESAB OK 84.78** operates with both AC and DC+ current, ensuring versatility across different welding setups. Its rutile basic coating guarantees stable arc performance and high weld quality, making it suitable for the most demanding industrial environments.
Key Features of ESAB OK 84.78
- Wear Resistance: Coarse chromium carbides provide excellent resistance to abrasion, even in high-impact environments.
- High Hardness: The carbide-rich steel matrix delivers outstanding durability and surface protection.
- Corrosion and Heat Resistance: Performs reliably in corrosive environments and at elevated temperatures, maintaining weld integrity.
- Versatile Applications: Ideal for surfacing parts like earth-moving equipment, pumps, mixers, screws, and crushers.
- Welding Flexibility: Operates with both AC and DC+ currents, offering compatibility with various welding machines.
Applications
- Earth-Moving Equipment: Ideal for surfacing dozer blades, loader buckets, in addition to other components exposed to extreme wear.
- Sand Pumps and Feed Screws: Provides durable, abrasion-resistant welds for parts handling abrasive materials like sand, coal, and ore.
- Crushers and Mixers: Extends the life of industrial crushers and mixers by delivering hardfacing solutions for high-impact, abrasive environments.
- Mining and Mineral Processing: Perfect for parts used in the mining industry, where surfaces are subjected to intense abrasion and corrosion.
Specifications
| Feature | Details |
|---|---|
| Classification | EN 14700: E Z Fe14 |
| Alloy Type | Carbide-Rich Steel |
| Coating Type | Rutile Basic |
| Welding Current | AC, DC+ |
| Typical Weld Metal Composition | 4.5% C, 1.0% Mn, 0.8% Si, 31.8% Cr |
| Deposition Rate | 1.6-2.9 kg/h (depending on diameter) |
For hardfacing applications requiring maximum wear and abrasion resistance, choose ESAB OK 84.78. Its high chromium carbide content and versatile application make it an essential tool for earth-moving, mining, and industrial machinery.
Reference: manufacturer’s page.
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