Soldering and Brazing
Soldering is a process in which two or more metal items are joined together by melting and flowing a filler metal into the joint, the filler metal having a relatively low melting point. Soft soldering is characterized by the melting point of the filler metal, which is below 400 °C (752 °F). The filler metal used in the process is called solder. Soldering is distinguished from brazing by use of a lower melting-temperature filler metal; it is distinguished from welding by the base metals not being melted during the joining process.
Brazing is a joining process whereby a filler metal or alloy is heated to melting temperature above 450 °C (840 °F) or, by the traditional definition in the United States, above 800 °F (427 °C) and distributed between two or more close-fitting parts by capillary action. By definition the melting temperature of the braze alloy is lower (sometimes substantially) than the melting temperature of the materials being joined. The brazed joint becomes a sandwich of different layers, each metallurgically linked to the adjacent layers.
Silver brazing alloys
Maintenance welding alloys, flamespray, flash back arrestors
Mild steel, stainless, brazing, silver brazing alloys
Soldering & brazing