What are SFA numbers?

SFA numbers refer to designations assigned to welding materials, which are derived from the specifications outlined by the American Welding Society (AWS). These designations provide critical information about the composition and intended application of welding electrodes and filler materials. Each SFA number corresponds to a specific type of welding process and the required characteristics of the materials, ensuring that welders select appropriate materials for their specific applications. This standardization is crucial in maintaining the quality and integrity of welded joints, as different welding projects may require different types of rods or wires, depending on the metal being welded and the conditions of the project.

The focus on welding materials and their specifications reflects the importance of adhering to recognized standards in the welding industry, which helps to optimize performance and safety in welding practices.