Alloy SuperDuplex / 1.4501

Super Duplex S32760/ F55 , Super Duplex Alloy UNS S32760 (F55 / 1.4501) has excellent resistance Pitting and Crevice Corrosion in seawater at elevated temperatures, supplied with a PREN 40<( Pitting Resistance Eqv) . Excellent resistance to SCC ( Stress Corrosion Cracking) in Sour and Chloride environments .

Providing higher strengths than both austenitic and 22% Cr Duplex Stainless Steels UNS S32760 (F55) is suited to a variety of applications in industries such as Oil & Gas, CPI(Chemical Processing Industries), and Marine environments.

UNS S32760 (F55 / 1.4501) is listed in NACE MR 01 75 for sour service and having gained ASME Approval for Pressure Vessel applications.

Alloy	Material No.	EN symbol (short)	UNS	Registered work label
Super Duplex S32760	1.4501	X2CrNiMoCuWN25-7-4	UNS S32760	ASTM A182/ F55

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Chemical composition of 1.4501

Element	C	Cr	Cu	Fe	Mo	Mn	N
%	0.030 max	24-26	0.5-1.0	Remainder	3.0-4.0	1.0 max	0.20-0.30

Element	Ni	P	S	Si	W
%	6.0-8.0	0.030 max	0.010 max	0.010 max	0.50-1.0

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Special properties

Youngs Modulus N/mm2	Density kg/dm³	Magnetic Permeability
199 x 10³	7.81 g/cm³	33

Excellent Resistance to pitting and crevice/erosion corrosion

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Specifications

• EN 10088-3 1.4501
• ASTM A473 UNS S32760 Forgings
• ASTM A182 Grade F55 UNS S32760 Forged Flanges
• ASTM A240 UNS S32760 Sheet and Plate
• ASTM A479 UNS S32760 Bar
• ASTM A276 UNS S32760 Condition A
• NACE MR 01-75

The material comes with a 3.1 certification. 3.2 certifications are available with surcharge.

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Mechanical properties

Property	0.2% Proof Stress (N/mm2 ) [ksi] minimum	Ultimate Tensile Strength (N/mm2) [ksi] minimum	Elongation (%) minimum	Hardness (HBN)	Reduction of Cross Section Area (%) minimum	Charpy V-notch Impact at ambient Temp (J) [ft.lb]	Charpy V-notch Impact at -46°C (J) [ft.lb]
Value	550 [79.8]	750 [108.8]	25	270 max	45	80 min [59 min]	45 av, 35 min [33 av, 25.8 min]

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Delivery program

Various sizes and tolerances available upon request.