ELECTRODE KOBELCO LB52U LH (E7016) 4.0MM
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KOBELCO LB52U LH (E7016) 4.0MM Welding Electrode
Product Overview
The KOBELCO LB52U LH is a premium low-hydrogen, iron-powder coated welding electrode classified under AWS A5.1 E7016, engineered by Kobelco — one of the world's most trusted names in welding consumables. This 4.0mm diameter electrode is purpose-built for high-quality, crack-resistant welds on carbon steel and low-alloy steel structures, making it a top choice for structural fabrication, shipbuilding, pressure vessels, and heavy industrial applications.
"LH" denotes Low Hydrogen, meaning this electrode is specially formulated to minimize diffusible hydrogen content in the weld metal — significantly reducing the risk of hydrogen-induced cracking (cold cracking), especially critical when welding thick sections, restrained joints, or higher carbon-equivalent steels.
Key Specifications
| Attribute | Detail |
|---|---|
| Brand | Kobelco (Kobe Steel) |
| Product Code | LB52U LH |
| AWS Classification | E7016 |
| Diameter | 4.0mm |
| Coating Type | Low-Hydrogen Lime-Titania (Iron Powder) |
| Current Type | AC / DC+ (DCEP) |
| Tensile Strength | ˜ 550–570 MPa |
| Yield Strength | ˜ 460–470 MPa |
| Elongation | = 25–28% |
| Impact Value | High CVN toughness at low temperatures |
Features & Benefits
- Excellent Low-Temperature Toughness – Delivers superior Charpy V-notch impact values, ideal for structures exposed to cold environments or dynamic loading.
- Low Hydrogen Formulation – Reduces porosity and prevents underbead/cold cracking, especially on higher carbon or thicker steel sections.
- Smooth, Stable Arc Performance – Easy arc striking and re-striking with minimal spatter for a cleaner welding process.
- Excellent Slag Detachability – Self-peeling slag speeds up multi-pass welding and reduces post-weld cleaning time.
- All-Position Welding – Suitable for flat, horizontal, vertical, and overhead positions.
- High Deposition Efficiency – Iron-powder coating boosts productivity without sacrificing weld quality.
- X-Ray Quality Welds – Consistently passes radiographic inspection standards, making it suitable for critical, code-compliant welding.
Recommended Applications
- Structural steel fabrication (buildings, bridges, towers)
- Shipbuilding and marine structures
- Pressure vessels and boiler fabrication
- Heavy machinery and equipment manufacturing
- Pipeline and storage tank construction
- General fabrication requiring high-strength, crack-free welds
Why Choose KOBELCO LB52U LH Electrodes?
Trusted by welders and fabricators worldwide, Kobelco LB52U LH is renowned for its consistent arc stability, low spatter, and reliable mechanical properties, making it a preferred electrode for both routine fabrication and code-critical structural welding. Its low-hydrogen properties make it especially suited for job sites where crack prevention is non-negotiable.
Storage Tip: Store in a dry environment and use a holding oven (100–150°C) once opened to preserve low-hydrogen performance and prevent moisture pickup.
