S125751-035 - Hobart E10018-D2 High Tensile Welding Rods 5/32 50lb

Technical Analysis: Hobart Hoballoy 10018-D2

The Hobart Hoballoy 10018-D2 is a premium low-hydrogen, iron powder electrode designed specifically for the Shielded Metal Arc Welding (SMAW) of high-tensile steels. Classified under AWS A5.5 as E10018-D2, this electrode is formulated with a Manganese-Molybdenum (Mn-Mo) alloy system. This chemical composition is critical for achieving a minimum tensile strength of 100,000 psi (690 MPa) in the as-welded condition, making it suitable for joining high-strength low-alloy (HSLA) steels such as ASTM A514 and A517.

Metallurgically, the Hoballoy 10018-D2 offers a fine-grained weld deposit that exhibits excellent ductility and impact toughness, even at sub-zero temperatures. The coating is engineered to resist moisture absorption, a vital characteristic for preventing hydrogen-induced cracking (cold cracking) in the heat-affected zone (HAZ) of hardenable steels. It typically meets H4 diffusible hydrogen designations, ensuring less than 4ml of hydrogen per 100g of deposited weld metal when stored and handled correctly.

This 5/32-inch (4.0 mm) diameter variant operates optimally on Direct Current Electrode Positive (DCEP). The iron powder content in the coating increases deposition rates compared to non-iron powder equivalents, improving travel speeds and overall productivity. The slag system is designed for easy removal, revealing a smooth bead profile with minimal spatter. It is an all-position electrode, capable of producing X-ray quality welds in flat, horizontal, vertical-up, and overhead positions.

Storage and Handling: As a low-hydrogen consumable, Hoballoy 10018-D2 must be stored in a dry environment. Once the hermetically sealed 50 lb can is opened, electrodes should be maintained in a rod oven at temperatures between 250°F and 300°F (120°C - 150°C) to preserve their low-hydrogen status. Reconditioning of exposed electrodes should follow manufacturer guidelines, typically requiring baking at higher temperatures.