Use & Application
Duplex stainless steel pipe, plate, fittings and forgings have an approximate 50:50 microstructure of austenite with a ferrite matrix. This, coupled with general alloying level, confers: - high strength compared with standard austenitic steels, e.g. type 316L. - good general corrosion resistance in a range of environments. - high resistance to chloride induced stress corrosion cracking (CSCC). - high resistance to pitting attack in chloride environments, e.g. seawater. These alloys are finding widening application in the **offshore oil/gas, chemical and petrochemical process industries, e.g. pipework systems, flowlines, risers, manifolds** etc. This Filler Metal is also used for welding on stainless structures where a particularly high strength is required.
Alloy type
22%Cr standard ferritic-austenitic duplex stainless steels.
Microstructure
Multipass welds in the as-welded condition contain about 25–50% ferrite depending on dilution and heat input/cooling rate conditions.
Materials to be welded

EN W.Nr.: 1.4462 (X2CrNiMoN22-5-3), 1.4362 (X2CrNiN23-4).
ASTM: A182 Gr F51, A890 Gr 4A (cast).
UNS: S31803, S32205, S32101, S32304, S32001, J92205.
PROPRIETARY: SAF2205, SAF 2304 (Sandvik), Uranus® 45N, 35N (Industeel), A903 (voestalpine), Cronifer 2205LCN (VDM), Maresist F51 (Schmidt + Clemens), SM22Cr (Nippon Steel Corporation), LDX 2101 (Outokumpu).

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