2594 is a covered electrode with rutile-basic coating used for welding of super-duplex (austenitic-ferritic) stainless steels of UNS S32750/S32760 type.
The weld metal has especially good properties under severely corrosive conditions. It has excellent stress corrosion cracking resistance in chloride containing media, excellent pitting resistance, high resistance to general corrosion, high resistance to erosion corrosion and corrosion fatigue.
Spray transfer gives a bead with a finely rippled surface. There is little spatter and very good slag removal. The electrode has excellent arc stability and fast burn off rate with minimal stub loss. It is also characterized by improved moisture resistance, self-peeling slag, high resistance to porosity and easy post weld finishing.
Typical applications include welding of high alloy austenitic-ferritic stainless steels such as UNS S32750 (wrought) and UNS J93404 (cast) and other super-duplex steels, 25% chromium duplex stainless steels with PRE values between 37 and 40, dissimiliar joints between duplex and carbon and low-alloy steels, 2205 and corresponding duplex steels where the highest corrosion resistance is required.
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