309LT50 - Harris ER309L 2.5mm Stainless Steel TIG Welding Rods (10lb Tube)

Weld Stainless to Mild Steel with Confidence

If you are looking for the "universal problem solver" for your TIG welding projects, the Harris ER309L rod is the essential filler metal to keep in your shop. Known among fabricators as the go-to rod for joining dissimilar metals, this 309L alloy allows you to weld stainless steel (like 304 series) to mild steel without worrying about cracking or weak joints. The 2.5mm diameter is a versatile size, perfect for medium-gauge materials where you need good heat control and filler deposition without overwhelming the puddle.

Harris produces these rods to be exceptionally clean, ensuring a smooth feed and a stable arc. When you are under the hood, you want a filler metal that flows wet and creates a bead with a classic "dime" appearance. The low carbon content in this "L" grade rod means your welds will stay bright and resist rust better than standard 309 rods, especially in the heat-affected zone. It is also the perfect choice if you are building up a surface or applying a buffer layer on carbon steel before capping it with stainless.

Packaged in a sturdy 10lb tube, these rods stay straight and clean until you are ready to use them. Whether you are repairing food processing equipment, working on custom automotive exhausts, or fabricating brackets that transition from steel frames to stainless components, Harris ER309L gives you the professional results you demand. Stop struggling with mismatched alloys and trust the rod designed to bridge the gap between different steels.