S307208-033 - Hobart Quantum Arc D2 .035" Low Alloy MIG Wire 33lb Reel

High-Strength Low-Alloy MIG Welding Wire

The Hobart Quantum Arc D2 is a premium .035-inch solid MIG welding wire designed for joining high-strength carbon and low-alloy steels. Classified as ER80S-D2 under AWS A5.28 specifications, this wire is engineered to provide superior mechanical properties compared to standard mild steel electrodes like ER70S-6. The "D2" designation indicates a chemical composition enriched with Manganese and Molybdenum, which significantly enhances the tensile and yield strength of the weld deposit, making it capable of withstanding extreme stresses and loads. This specific alloy formulation allows the wire to maintain high strength even in elevated temperature service applications, making it a preferred choice for power piping and process industries.

One of the standout technical characteristics of the Quantum Arc D2 is its sophisticated deoxidation package. While it contains high levels of deoxidizers to combat porosity caused by rust, mill scale, or oil on the base metal, it maintains a balanced silicon content to ensure excellent toughness. The wire produces X-ray quality welds that are virtually free of porosity and slag inclusions, ensuring the structural integrity of critical components. The copper-coated finish on the wire serves multiple purposes: it enhances electrical conductivity for a stable arc, reduces friction within the liner and contact tip for smooth feedability, and protects the wire from oxidation during storage.

Packaged on a durable 33-pound steel reel, this product is designed for industrial environments where wire integrity and smooth payout are essential. The 12-inch spool fits standard industrial wire feeders. The wire is versatile in its shielding gas requirements, operating effectively with either a 75% Argon / 25% CO2 blend for a smoother arc and less spatter, or 100% CO2 for deeper penetration and lower operational costs. This flexibility allows fabrication shops to adapt the process to their specific procedure specifications (WPS) without changing consumables.

Industrial Applications and Metallurgy

The Quantum Arc D2 is specifically formulated to match the mechanical properties of low-alloy steels such as AISI 4130, 4140, and various grades of high-yield pipe. It is extensively used in the fabrication of heavy construction equipment, cranes, and earthmoving machinery where welds must endure repetitive high-stress cycles. Additionally, it serves as an excellent choice for the automotive and railcar industries. The wire's ability to produce defect-free root passes on open butt joints makes it invaluable for pipe welding applications. With a tensile strength exceeding that of standard mild steel wires, it provides an extra margin of safety in structural designs.