RG4518 - R45 Mild Steel Gas Welding Rod 1/8" (3.2mm) - 10lb Tube

Technical Overview of R45 Gas Welding Rods

The RG45-18 is a premium quality, copper-coated mild steel rod designed specifically for oxy-fuel gas welding (OFW) applications. Conforming to AWS A5.2 Class R45 specifications, this filler metal is engineered to join low carbon steels where the minimum tensile strength requirement does not exceed 45,000 psi. The copper coating serves a dual purpose: it extends shelf life by inhibiting oxidation on the rod surface and promotes better electrical conductivity if used in specific hybrid applications, though its primary design is for gas welding.

With a diameter of 3.2mm (1/8 inch), this rod provides substantial deposition rates for medium-gauge materials. The chemical composition is strictly controlled to ensure a fluid weld puddle that wets out smoothly, reducing the risk of lack of fusion. It is an excellent choice for applications requiring high ductility and machinability. The rod flows freely under a neutral flame, allowing the operator to control the heat input and bead profile effectively. It is widely utilized in industrial maintenance, pipe welding (non-critical), and fabrication of non-structural steel components.

Packaged in a durable 10lb tube, these 36-inch cut lengths are protected from moisture and contaminants. The R45 grade is the industry standard for general-purpose gas welding, offering a reliable balance between strength and ease of use. It requires no flux when welding clean mild steel, as the puddling action of the gas flame is sufficient to float out impurities.