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686 is an austenitic Ni-Cr-Mo-W alloy offering outstanding corrosion-resistance in a range of extreme environments. It can be used to overmatch 59, 622, C276 and 625. It is also used for dissimilar welds in superaustenitic and superduplex stainless steel or combinations of these with Ni base alloys. The high alloy levels of Cr-Mo-W ensure exceptional resistance to pitting, crevice and general corrosion.

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