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Duplex F55 UNS S32760  1.4501      F55 Super Duplex has enhanced pitting and crevice corrosion resistance compared with the ordinary austenitic or duplex types. This is due to the further additions of chromium, molybdenum, and nitrogen to these grades. F55 is the most common super duplex grade.   TYPICAL ANALYSIS               C. Mn. P. S. Si.  Cr. Ni.  Mo. N.. W. 0.03% max. 2.00% max. 0.03% max. 0.02% max. 1.00% max.  24.00-   26.00% 4.50-   6.50%  3.00-   4.00% 2.50-   3.50% 0.08-   0.20%        Typical Mechanical Properties     Tensile Strength N/mm2 860 min.   0.2% Proof Stress N/mm2 720 min.   Elongation 16 min.   Hardness (Brinell 335 max.