In　this　study,　NSSC　2120　economical　duplex　stainless　steel　was　prepared　and　the　effects　of　aging　temperatures　on　its　intermetallic　phase　morphology,　tensile　strength,　elongation,　corrosion　resistance,　and　antimicrobial　properties　were　investigated.　The　results　revealed　that　after　aging　the　sample　at　650　°C,　it　exhibits　better　pitting　corrosion　resistance　and　higher　tensile　strength.　Upon　increasing　the　aging　temperature　up　to　750　°C,　the　pitting　corrosion　resistance　and　tensile　strength　of　the　samples　were　decreased　due　to　the　precipitation　of　the　Ε-Cu　phase　in　the　matrix.　Moreover,　with　the　further　increase　in　the　aging　temperature　to　850　°C,　oxides　containing　Mn　and　Cr　(CrMn1.5O4)　and　sulfides　(MnS)　precipitated　from　the　samples,　further　decreasing　their　pitting　corrosion　resistance　and　tensile　strength.　Upon　aging　the　samples　at　950　°C,　no　second　phase　was　observed　and　the　corrosion　resistance　was　less　than　that　of　the　sample　after　aging　at　650　°C,　but　the　tensile　strength　was　greater　than　that　of　the　sample　after　aging　at　650　°C.　Antibacterial　test　results　revealed　that　the　sample　after　aging　at　750　°C　exhibited　a　good　antibacterial　effect　due　to　the　precipitation　of　the　rod-shaped　Ε-Cu　phase.　©　2019　by　the　authors.