S480651-032 - Hobart Sterling AP E312-16 Stainless Stick Electrode 5/32"

Technical Overview: Hobart Sterling AP 312

The Hobart Sterling AP 312 is a premium stainless steel shielded metal arc welding (SMAW) electrode designed for the most demanding maintenance and repair applications. Classified as an E312-16, this electrode features a high-alloy composition (nominally 29% Chromium, 9% Nickel) that produces a two-phase weld deposit with substantial ferrite content. This metallurgical structure provides exceptional resistance to cracking, making it the ideal choice for joining dissimilar metals, such as carbon steel to stainless steel, or for welding generally hard-to-weld base materials.

Engineered for versatility, the Sterling AP 312 excels in applications involving abrasion-resisting steels, manganese steels, hardening steels, and spring steels. It is frequently utilized in the repair of tools, dies, and heavy equipment where the base metal composition may be unknown or difficult to weld with standard mild steel or 308/316 stainless electrodes. The electrode offers a high tensile strength, typically exceeding 100,000 PSI, ensuring structural integrity in high-stress environments.

Operable on both Direct Current Electrode Positive (DCEP) and Alternating Current (AC), this 5/32-inch diameter rod provides a stable, directional arc that is easy to control in all welding positions. The rutile-based coating ensures smooth metal transfer and produces a slag system that is often self-detaching, minimizing inter-pass cleaning and downtime. It is suitable for both single-pass and multi-pass welding procedures, providing a bead profile that is finely rippled and aesthetically pleasing.