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super duplex steel pipe

The corrosion resistance comes from the addition of alloying material, mostly the chromium content. The ASTM A790 Pipes are resistant to pitting corrosion and crevice corrosion. The pipes could also be electric fusion welded.

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Duplex stainless steels have a mixed microstructure of austenitic and ferritic with the aim of producing a 50/50 mix, but in commercial alloys the mix may be 40/60 respectively. Duplex stainless steels are so named because they have a two-phase microstructure consisting of 50% austenitic and 50% ferritic stainless steel grains.

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