RG45 is a copper coated brazing rod for low carbon steel. It produces high quality welds which are ductile, machinable and free of porosity. RG45 is excellent for steel sheets, plates, pipes, castings and structural shapes. No flux required. It is capable of welding up to 1/4" thick steel. For clean joint and beveling of heavy sections keep the torch tip at low angle to base metal. Pre-heat normally is normally not required. Use a neutral flame or a very slight excess of acetylene (reducing flame). AWS changed this class from “RG” to “R” in 1969. It is still listed as both online.
