TTU948 - R45 Oxy-Acetylene Mild Steel Welding Rod 2.5mm 1lb

Versatile 2.5mm Oxy-Acetylene Steel Filler Rod

Rediscover the art of gas welding with our 2.5mm R45 Steel Gas Rods. Designed for the craftsman who values the control and aesthetics of the oxy-fuel process, these rods are the perfect companion for your torch kit. Gas welding remains a preferred method for many specific applications, such as thin-wall tubing in aviation or motorsports, wrought iron restoration, and bending/heating applications where electric arc welding might be too aggressive. This rod is formulated to flow easily under the heat of a neutral flame, creating a bond that is both strong and visually appealing.

The RG45 classification indicates a rod with a minimum tensile strength of 45,000 psi, which is perfectly matched for standard low-carbon steels. Because the rod is copper-coated, it arrives clean and ready to use, free from the surface rust that can cause inclusions or porosity in your weld. The 2.5mm (approximately 3/32") diameter is a versatile size; it is small enough to handle intricate detail work on thinner gauges but carries enough bulk to build up a bead on 1/8" plate or pipe. This balance makes it a "go-to" size for general shop inventory.

One of the major advantages of using R45 gas rods on mild steel is the lack of flux required. Unlike brazing or soldering, fusion welding with R45 relies on the purity of the steel and the shielding of the flame itself. This results in a clean operation with no slag to chip away afterwards—just a smooth, ripple-patterned weld that can be easily filed, ground, or machined. It is an excellent choice for automotive bodywork where the weld needs to be hammered and dollied flat, as the deposit remains soft and ductile.

This 1lb tube is perfect for hobbyists, students, and professionals who need high-quality filler metal without committing to a large bulk purchase. The 36-inch rods are easy to manipulate, allowing for precise feeding into the puddle. Whether you are fixing a garden gate, working on an exhaust system, or practicing your puddle control, these R45 rods provide the consistent performance required for successful oxy-acetylene welding.