S307312-085 - Hobart Quantum Arc 3 ER70S-3 .045 MIG Wire 45lb Spool

Hobart Quantum Arc 3 ER70S-3 MIG Wire Overview

The Hobart Quantum Arc 3 is a premium mild steel solid wire designed to meet the rigorous demands of modern manufacturing and fabrication environments. Classified as an AWS ER70S-3 electrode, this wire is specifically engineered for welding clean, oil-free, and rust-free base metals. Unlike its ER70S-6 counterpart, the Quantum Arc 3 features a carefully controlled chemistry with slightly lower levels of manganese and silicon deoxidizers. This formulation is intentional; it prevents the formation of excessive silica islands on the weld bead, which is a critical advantage for industries where post-weld aesthetics and painting processes are paramount.

With a diameter of 0.045 inches, this wire is well-suited for medium-to-heavy gauge fabrication, offering high deposition rates and deep penetration when paired with the appropriate shielding gas. It performs exceptionally well with both 100% CO2 and Argon/CO2 blends, providing versatility in various shop setups. The wire is copper-coated, a feature that enhances electrical conductivity at the contact tip and ensures smooth, consistent feeding through the liner and gun. This results in a stable arc, reduced spatter, and less downtime for maintenance or tip changes.

The product comes on a 45-pound fiber spool, which is designed to be durable during transport yet easier to dispose of than traditional plastic spools, aligning with eco-friendly workshop practices. The "Fs" in the product designation highlights this fiber spool packaging. This wire is particularly favored in the automotive industry for frames and structural components, as well as in general fabrication of sheet metal, farm implements, and HVAC components where the base material is new and clean.

By choosing Hobart Quantum Arc 3, fabricators gain the benefit of a high-speed, low-spatter wire that produces sound, porosity-free welds on prepared surfaces. Its fluid puddle wets out smoothly, creating flat bead profiles that require minimal grinding. For automated or robotic welding cells, the consistent cast and helix of the Quantum Arc 3 ensure precise wire placement, reducing weld defects and increasing overall throughput.