Duplex Stainless Steel(DSS) nuduhake klompok baja tahan karat kanthi struktur mikro metalografi saka ferit lan austenit saben kira-kira 50%. Umumé, isi fase kurang kudu paling sethithik 30%. Ing kasus isi karbon sing kurang, isi Cr 18% nganti 28%, lan isi Ni 3% nganti 10%. Sawetara baja tahan karat dupleks uga ngandhut unsur paduan kayata Mo, Cu, Nb, Ti, lan N. DSS nduweni karakteristik baja tahan karat austenitik lan feritik. Dibandhingake karo ferrite, wis plasticity lan ductility luwih, ora brittleness suhu kamar, lan Ngartekno apik resistance karat intergranular lan kinerja welding, nalika isih ngramut brittleness, konduktivitas termal dhuwur, lan superplasticity minangka ferrite stainless steel. Dibandhingake karobaja tahan karat austenitik, DSS nduweni kekuatan dhuwur lan resistance Ngartekno apik kanggo karat intergranular lan karat kaku klorida. Baja tahan karat duplex nduweni resistensi korosi pitting sing apik lan uga minangka baja tahan karat sing ngirit nikel. Kasedhiya gelar duplex stainless steel casting dening ilang investasi lilin casting: 1.4460, 1.4462, 1.4468, 1.4469, 1.4517, 1.4770, A 890 1C, A 890 1A, A 890 3A, A 890 3A, A 890 1B, A 995 4A, A 995 5A, 2205, 2507, 022Cr22Ni5Mo3N, 022Cr25Ni6Mo2N
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