ESAB OK 76.28
The ESAB OK 76.28 is a low-hydrogen, basic DC electrode designed for welding creep-resistant steels containing 2.25% chromium and 1% molybdenum. It delivers stable arcs with minimal spatter and provides high-quality welds in critical applications. This electrode is classified under AWS A5.5: E9018-B3 and EN ISO 3580-A: E CrMo2 B 4 2 H5. It provides excellent performance in environments with elevated temperatures.
OK 76.28 is particularly suited for applications requiring strength and durability at high temperatures, such as power generation and petrochemical facilities. Its low diffusible hydrogen content (< 5 ml/100g) minimizes the risk of hydrogen-induced cracking, making it ideal for long-term operations.
Key Features of ESAB OK 76.28
- Low-Hydrogen Electrode: Reduces the risk of hydrogen-induced cracking, ensuring reliable, defect-free welds in critical applications.
- Creep-Resistant: Provides high-strength welds at elevated temperatures, making it ideal for long-term, high-temperature operations.
- Versatile Welding Current: Operates with DC+(-) current, providing stable arc performance across a wide range of applications.
- Superior Mechanical Properties: Delivers excellent tensile strength (720 MPa) and impact toughness, even after post-weld heat treatment (PWHT).
- Multiple Approvals: Certified by international bodies such as ABS, BV, CE, and DNV-GL. Therefore making it suitable for highly regulated industries.
Key Industry Applications
- Petrochemical Industry: Frequently used for welding pressure vessels, piping systems, and reactors, especially components exposed to high temperatures and pressure in petrochemical plants.
- Power Generation: Ideal for welding steam piping, boilers, and turbines in power plants. It provides long-lasting, crack-resistant welds for high-temperature components.
- Oil and Gas Pipelines: Ensures high-strength welds in critical pipeline sections subjected to both high-pressure and high-temperature conditions in the oil and gas industry.
- Refineries: Perfect for welding refinery components, such as heat exchangers and reactors, that require high-temperature strength and resistance to cracking.
- Chemical Processing: Suitable for welding equipment and piping systems in chemical plants, where creep resistance and toughness at high temperatures are essential.
Specifications
| Feature | Details |
|---|---|
| Classification | AWS A5.5: E9018-B3 |
| Yield Strength | 630 MPa |
| Tensile Strength | 720 MPa |
| Elongation | 21% |
| Typical Charpy V-Notch Impact Value | 130 J at 20°C |
| Welding Current | DC+(-) |
The ESAB OK 76.28 provides superior weld performance for creep-resistant steels, ensuring reliable and durable welds in high-temperature environments. It is the ideal solution for critical applications in petrochemical, power generation, and other demanding industries.
