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(Super) Duplex Stainless Steel PipeDual phase stainless steel with a +? dual phase structure, so the characteristics of the performance characteristics of the construction of austenitic stainless steel and ferritic stainless steel, is a kind of high strength and corrosion resistance of stainless steel. Usually, in the case of low Cr, C content in 18%~28%, Ni content in 3%~10%. Some steels also contain Mo, Cu, Nb, Ti, N and other alloy elements.Compared with ferrite, plastic, toughness, and no room temperature brittleness, the intergranular corrosion resistance and welding performance are signi