Use & Application
Superduplex 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. In dilute sulfuric acid contaminated with chloride ions, 2507 has better corrosion resistance than 904L, which is a highly alloyed austenitic steel grade specially designed to resist pure sulfuric acid. These alloys are finding widening application in the **offshore oil/gas, chemical and petrochemical process industries, e.g. pipework systems, flowlines, risers, manifolds **etc.
Alloy type
25%Cr ferritic-austenitic superduplex stainless steels.
Microstructure
Austenite-ferrite duplex microstructure in AW or solution annealed condition with an approximate 30- 60% ferrite level, depending on heat cycle conditions.
Materials to be welded

EN W.Nr.: 1.4410 (X2CrNiMoN25-7-4).
ASTM: A182 F53, A182 F55, A890 Gr5A, A890 Gr6A.
UNS: S32750, S32760, J93404.
PROPRIETARY: SAF 2507 (Sandvik), UranusĀ® 47N (Industeel).

Products of the line 2507

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