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ASTM A790 2205

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NS S31803 is a duplex grade with a ferritic-austenitic microstructure. The alloy consists of around 40-50% ferrite in the annealed condition. The duplex microstructure has the high strength of the ferritic grades whilst retaining the corrosion resistance of the austenitic grades https://www.wilsonpipeline.com/product-category/stainlessduplex-steel-pipe.html/page/2

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