
When you aren't sure what kind of steel you are welding, or when you need to join two completely different types of metal, reach for the Hobart Sterling AP 312. Often called the "universal" maintenance rod, this 3/32" stick electrode is a must-have for any welder's arsenal. It is designed to handle the toughest repair jobs where standard rods would crack or fail. From fixing broken leaf springs and tool steels to welding stainless brackets onto mild steel frames, the Sterling AP 312 gets the job done right the first time.
One of the standout features of this rod is how easily it runs. You don't need a fancy machine; it operates smoothly on both AC and DC welders. The "AP" stands for All Position, meaning you can run a vertical-up bead or an overhead weld with the same ease as a flat weld. The arc is smooth and predictable, and the slag practically falls off by itself as it cools, leaving you with a shiny, professional-looking bead that inspires confidence.
This 5lb can is perfect for maintenance shops, farms, and mobile welding rigs. Because it resists cracking so well, it's the safest bet for repairing parts made of high-carbon steel or unknown alloys. It puts down a weld with incredibly high tensile strength—much stronger than standard 7018 or 6010 rods—ensuring your repairs hold up under stress. Stop guessing and start welding with the rod that handles it all.
| Additional Information |
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| Brand:Hobart |
| AWS Spec:E312-16 |
| Diameter:2.5mm (3/32") |
| Grade:312 |
| Packaging:5 lb Tube |
| Weld Process:Stick (SMAW) |
| Polarity:AC/DCEP |
| Rod Type:Stick Electrode |
| Coating Type:Rutile |
| Welding Position:All Position |
| Tensile Strength:120,000 PSI |
| Applications:Dissimilar Metals, Maintenance Repair, Tool Steel |
| Packaging Description:15lb can |