5500504000 - ESAB OK 55.00 E7018-1 Low Hydrogen Stick Electrode 5.0mm x 450mm

Premium Low-Hydrogen Electrode for Critical Structures

The ESAB OK 55.00 is a high-quality, basic-coated stick electrode classified as AWS E7018-1. Engineered for the most demanding industrial applications, this electrode is characterized by its exceptional mechanical properties and reliability. The "-1" suffix in its classification denotes superior impact toughness at low temperatures, making it a preferred choice for projects operating in harsh environments or requiring stringent code compliance. It delivers consistent performance with a focus on metallurgical purity and structural integrity.

One of the defining features of the OK 55.00 is its high resistance to hot cracking. This property is vital when welding restrained joints or thick sections where thermal stresses are significant. The electrode features ESAB's Low Moisture Absorption (LMA) coating technology, which significantly delays the rate of moisture pickup from the atmosphere. This ensures that the hydrogen content in the weld metal remains low, minimizing the risk of cold cracking (hydrogen-induced cracking) and reducing the frequency of re-baking required in humid conditions.

This specific variant comes in a 5.0mm diameter with an 18-inch (450mm) length, designed for heavy fabrication where higher deposition rates are necessary to maintain productivity. It is particularly suitable for welding high-strength steels, including shipbuilding grades A, D, and E, as well as pressure vessels and offshore structures. The electrode operates effectively on both AC and DC+ currents, offering versatility for various shop and field power sources.

Technical Specifications

• Classification: AWS A5.1: E7018-1 H4 R


• Diameter: 5.0mm


• Length: 450mm (18 inches)


• Impact Strength: Excellent CVN toughness at -45°C


• Approvals: ABS, BV, DNV, GL, LR (Subject to specific grade approvals)