ESAB OK 74.46 VP (VacPac)
The ESAB OK 74.46 VP is a low-hydrogen, iron powder electrode designed for welding pressure vessels and pipes. Alloyed with 0.5% Molybdenum (Mo), this LMA (Low Moisture Absorption) electrode is perfect for welding steels used in high-pressure applications. It ensures high-quality welds remain with excellent strength and ductility. Packaged in ESAB’s innovative VacPac™ system, the electrodes remain moisture-free, eliminating the need for re-baking and providing superior welding results right from the pack.
The basic covering and optimized coating composition of OK 74.46 VP make it ideal for welding at low currents, particularly suited for pipe welding. It operates on both AC and DC+ currents and produces minimal hydrogen diffusion (< 5 ml/100g), ensuring crack-free welds in demanding environments. Its excellent mechanical properties, including a tensile strength of 560 MPa and outstanding impact toughness, ensure reliable performance even after post-weld heat treatment (PWHT).
Key Features of ESAB OK 74.46 VP
- VacPac™ Technology: Guarantees moisture-free electrodes, thus eliminating the need for re-baking and ensuring reliable weld quality.
- 0.5% Molybdenum Alloyed: Provides high-strength welds, perfect for pressure vessels and high-temperature applications.
- Low Hydrogen Content: Diffusible hydrogen content of less than 5 ml/100g ensures crack-resistant welds.
- Optimized for Pipe Welding: Suitable for welding at low currents, especially effective in inclined positions.
- Wide Operating Range: Compatible with both AC and DC+ currents, offering flexibility in various welding environments.
Applications in Industries
- Pressure Vessel Construction: Ideal for welding pressure vessels in industries like oil and gas, where high strength and low hydrogen are critical for safety and performance.
- Pipeline Welding: Provides reliable welds in pipelines for transporting oil, gas, and chemicals, ensuring long-term durability and resistance to cracking.
- Power Generation: Perfect for welding boiler parts and turbines. Along with other components that must withstand high temperatures and pressure in power plants.
- Petrochemical Industry: Suitable for welding pressure-resistant components in refineries and chemical plants, ensuring strong welds in challenging environments.
- Shipbuilding: Delivers high-strength welds for critical shipbuilding components, offering excellent resistance to corrosion and stress in marine environments.
Specifications
| Feature | Details |
|---|---|
| Alloy Type | 0.5% Molybdenum (Mo) |
| Current | AC, DC+ |
| Diffusible Hydrogen | < 5 ml/100g |
| Tensile Strength | 560 MPa |
| Yield Strength | 460 MPa |
| Impact Value | 175 J @ 20°C (after PWHT) |
| Post-Weld Heat Treatment | 620°C for 1 hour |
Choose ESAB OK 74.46 VP for superior performance in demanding welding applications. It is an excellent choice for pressure vessel construction, pipeline welding, and power generation industries.
