522241025H - Hobart SubCOR SL 742 3/32" Seamless SAW Wire, 55lb Coil

Advanced Seamless Technology for High-Strength Applications

The Hobart SubCOR SL 742 is a premium seamless low-alloy metal-cored wire engineered specifically for the submerged arc welding (SAW) process. Designed to meet the rigorous demands of heavy industrial fabrication, this wire offers a yield strength of up to 100 ksi (690 MPa), making it an exceptional choice for welding high-strength low-alloy (HSLA) steels. The internal SKU for this product is 522241025H, and it represents a significant advancement in consumable technology for critical infrastructure projects.

One of the defining technical features of the SubCOR SL 742 is its seamless manufacturing process. Unlike traditional folded cored wires, seamless wires are produced from a continuous tube, completely eliminating the longitudinal seam. This hermetic seal prevents moisture absorption from the atmosphere, a critical factor in maintaining extremely low diffusible hydrogen levels (typically less than 4ml per 100g of weld metal). Low hydrogen content is essential when welding high-strength steels to minimize the risk of hydrogen-induced cracking (cold cracking) and to ensure the long-term structural integrity of critical components such as pressure vessels and vehicle frames.

The 3/32" (2.4mm) diameter allows for high current carrying capacity and deep penetration, typical of submerged arc welding. The wire is copper-coated, which enhances electrical conductivity, ensures smooth feeding through the contact tip, and protects the wire from oxidation during storage. This coating also reduces contact tip wear, leading to less downtime for maintenance and consumable replacement. The metal-cored design contributes to higher deposition rates compared to solid wires, improving productivity in high-volume fabrication environments by allowing for faster travel speeds without sacrificing bead quality.

Industrially, the SubCOR SL 742 is positioned for sectors requiring uncompromising weld quality, such as the fabrication of boiler components, crane booms, and heavy earthmoving equipment. Its formulation provides excellent impact toughness, even at low temperatures, ensuring reliability in harsh operating environments. When paired with the appropriate neutral or active flux, this wire delivers smooth bead profiles, easy slag removal, and consistent mechanical properties across multi-pass welds. It is particularly effective for casting repair and pipeline double jointing where metallurgical consistency is paramount.

This product is supplied in a 55lb coil, a standard packaging format for industrial SAW equipment, ensuring compatibility with most wire feeders and de-coiling systems used in structural steel and heavy manufacturing facilities.