KOBELCO LB-52U LH Welding Electrode (E7016) – 3.2mm

Premium Low Hydrogen Welding Electrode for High-Strength Steel Applications

Product Overview

The KOBELCO LB-52U is a high-quality, low-hydrogen, iron-powder-type covered electrode classified under AWS A5.1 as E7016. Renowned worldwide as one of the most trusted welding consumables in the shipbuilding, structural steel, and heavy fabrication industries, LB-52U delivers exceptional arc stability, superior mechanical properties, and outstanding crack resistance — making it a top choice for professional welders and fabrication shops seeking reliable, high-performance welding results.

This 3.2mm diameter electrode is engineered for precision welding on medium-to-thick section carbon steel and low-alloy steel components, offering excellent weld bead appearance, low spatter, and easy slag removal.

Key Features

• AWS Classification: E7016 (Low Hydrogen Potassium type)
• Diameter: 3.2mm
• Coating Type: Low hydrogen, iron powder covered electrode
• Current Type: AC / DC+ (reverse polarity)
• Excellent low-temperature impact toughness
• Superior resistance to weld metal cracking
• Smooth, stable arc with minimal spatter
• Easy slag removal and excellent bead appearance
• All-position welding capability (flat, horizontal, vertical-up, overhead)
• Low moisture absorption coating for consistent weld quality

Technical & Mechanical Properties

• Tensile Strength: Approx. 550–570 MPa
• Yield Strength: Approx. 460–470 MPa
• Elongation: 25–30%
• Charpy Impact Value: High toughness even at sub-zero temperatures (down to -20°C to -40°C depending on testing standard)
• Diffusible Hydrogen Content: Low (typically <5 mL/100g deposited metal)

Recommended Applications

The KOBELCO LB-52U E7016 electrode is widely used in:

• Shipbuilding and marine structures
• Bridge construction and structural steel fabrication
• Pressure vessels and boiler fabrication
• Heavy machinery and equipment manufacturing
• Steel structures requiring high crack resistance
• General fabrication of carbon steel and low-alloy steel (up to 490 MPa class steel)

Welding Parameters (Typical for 3.2mm)

• Welding Current: 90–140 Amps
• Polarity: AC or DC+
• Position: All positions (F, H, V-up, OH)

Why Choose KOBELCO LB-52U?

Manufactured by Kobe Steel (KOBELCO), a globally recognized leader in welding consumables, the LB-52U series is trusted by welders and quality inspectors for consistent, code-compliant welds that meet stringent international standards (AWS, JIS, and classification society approvals including ABS, DNV, LR, and BV). Its low-hydrogen design significantly reduces the risk of hydrogen-induced cracking, making it ideal for critical structural and load-bearing welds.

Storage & Handling Recommendation

To maintain optimal performance, store electrodes in a dry environment and use a holding oven (100–150°C) after opening the package to prevent moisture pickup, which is critical for preserving the low-hydrogen properties of the coating.

This product is priced “per KG”. The minimum quantity available to purchase is shown in the "Pack Qty". Low Hydrogen E7016