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Aufhauser C189 Deoxidized Copper is a filler metal containing 98% copper and small amounts of phosphorus and silicon. The C189 alloy is easy flowing and produces weld deposits that are porosity free, electrically conductive, and copper-color matched. The oxyacetylene gas flame must be neutral or slightly oxidizing. Tip size must be one to two sizes larger than the base plate. Preheating should be done only if the part is thick. A boric acid or borax flux such as Aufhauser Flux600 is recommended.

Aufhauser Naval Bronze is a 1% tin-copper-zinc filler metal. The addition of tin improves strength and corrosion resistance in the weld deposit. Naval Bronze does not provide as high a weld strength as Low Fuming Bronze (RBCuZn-C, C681). A borax-boric acid flux such as Aufhauser Flux600 is generally required. Joint clearances should be 0.002" to 0.005" wide. Preheating may be desirable for some applications. A neutral or slightly oxidizing flames should be used.