Soldering (AmE: /\u02c8s\u0252d\u0259r\u026a\u014b/, BrE: /\u02c8so\u028ald\u0259r\u026a\u014b/) is a process in which two or more items are joined together by melting and putting a filler metal (solder) into the joint, the filler metal having a lower melting point than the adjoining metal. Unlike welding, soldering does not involve melting the work pieces.