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Duplex F51  S31803  1.4462  Technical Data Duplex F51 is a duplex stainless steel designed to combine improved resistance to stress corrosion cracking, pitting, crevice corrosion and high strength when compared with other stainless alloys. This alloy resists chloride environments and sulphide stress corrosion. It is also roughly double the strength of standard austenitic stainless steels. 2205 is a duplex stainless steel designed to combine improved resistance to stress corrosion cracking, pitting, crevice corrosion and high strength when compared with other stainless alloys. This alloy resists chloride environments and sulphide stress corrosion. It is also roughly double the strength of standard austenitic stainless steels..        TYPICAL ANALYSIS             C. Mn. P. S. Si. Cr. Ni. Mo. N. 0.03% max. 2.00% max. 0.03% max. 0.02% max. 1.00% max. 21.00-   23.00% 4.50-   6.50% 2.50-   3.50% 0.08-   0.20%        Typical Mechanical Properties     Tensile Strength N/mm2 620 min.   0.2% Proof Stress N/mm2 448 min.   Elongation 25 min.   Hardness (Brinell 290 max.