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X2 CrNiMoCuN 25.6.3 – Austenitic Ferritic Duplex Steel

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Grade X2 CrNiMoCuN 25.6.3 is an austenitic Ferritic Duplex Steel that offers a high strength and superior corrosion resistance to that of other similar stainless steels.


X2 CrNiMoCuN 25.6.3
Ferralium 255
Ugine 4507
Ugine 52N+


Element Min Max
C (Carbon) 0.03%
Cr (Chromium) 24% 26%
Cu (Copper) 1% 2.5%
Mn (Manganese) 2%
Mo (Molybdenum) 2.7% 4%
N (Nitrogen) 0.15% 0.3%
Ni (Nickel) 5.5% 7.5%
P (Phosphorus) 0.035%
S (Sulphur) 0.015%
Si (Silicon) 0.7%
Mechanical Properties Min Max
Ultimate Tensile Strength (UTS) 750 MPa 1000 MPa
0.2% Proof Stress 550 MPa
Elongation 20%
Gauge Length A80mm


Commonly used within the Oil and Gas,

M12 FERRALIUM ''X2 CrNiMoCuN 25.6.3 'HEX NUT

Ferralium ‘X2 CrNiMoCuN 25.6.3’ Hex Nuts



Information is given for illustrative purposes only. Tachart accepts no responsibility for the accuracy of the data contained within or the use of the data by any other party.
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