Flux & Solder Wire are the core consumables used in the soldering process to create electrically conductive and mechanically sound joints, primarily in electronics and plumbing. Solder wire is a fusible metal alloy (traditionally tin-lead, now often lead-free) that melts to form the joint. Flux is a chemical cleaning agent contained within the solder wire core (rosin-core) or applied separately; it removes oxidation from the metal surfaces to ensure proper solder adhesion and flow. Selection is critical: The alloy composition and wire diameter must match the components and thermal mass, and the flux type must be compatible with the application and require post-cleaning.

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