Description
The ER312 2.4mm TIG Wire 5kg is a premium stainless steel TIG filler rod ideal for welding dissimilar metals, unknown steels, or high-strength alloys. It offers outstanding crack resistance, making it perfect for structural repairs, hard-to-weld materials, and applications with high thermal stress.
This wire features a high chromium content and moderate nickel levels. These elements create a ferritic-austenitic microstructure that combines strength with flexibility. It’s especially effective when working with tool steels, manganese steels, or cast components where weld failure isn’t an option. Even if the base metal composition is uncertain, ER312 TIG wire still performs consistently.
The 2.4mm diameter allows for precise weld control and smooth deposition. You’ll get clean, strong welds with minimal spatter and good arc stability. It’s often the go-to filler for mobile welders, fabrication shops, and maintenance teams who deal with unpredictable repair jobs.
Use this rod with DC+ polarity and clean base metals for best results. The 5kg spool offers the perfect balance for small to medium repair projects. It’s compact enough to stay portable while still covering plenty of weld time.
ER312 is frequently used in the mining, agriculture, steel fabrication, and heavy transport industries. Welders value it as a “problem-solver” rod—one that works when nothing else does. It also serves well as a buffer layer before applying harder surfacing wires or joining high-carbon steels to stainless.
At Fourie Welding & Tool, we supply quality welding consumables trusted by professionals across South Africa. We understand the challenges welders face—and stock the solutions you need.
Want technical data on ER312? See TWI Global’s welding filler guide.
