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The so-called duplex stainless steel in its solid solution of ferrite phase and austenite meet each half, generally less content of the content also need to reach 30%. In the case of low C, Cr content of 18% to 28%, Ni content of 3% to 10%. Some steel also contains Mo, Cu, Nb, Ti, N and other alloying elements.
The steel has the characteristics of austenitic and ferritic stainless steel,
1. comparing with the ferrite, plasticity, higher toughness, no room temperature brittleness, resistance to intergranular corrosion and welding performance are significantly improved, while also mainta ining iron Qualified stainless steel 475 ℃ brittleness and high thermal conductivity, with superplasticity and so on.
2. Comparing with the austenitic stainless steel, high strength and resistance to intergranular corrosion and resistance to chloride stress corrosion has improved significantly.
3. Duplex stainless steel has excellent resistance to pitting corrosion resistance, but also a section of nickel stainless steel.
Post time: Mar-12-2018