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Alloy S32760

Alloy S32760

Super Duplex Alloy UNS S32760 (F55 / 1.4501) has excellent corrosion resistance to a wide variety of media, with outstanding resistance to pitting and crevice corrosion in seawater and other chloride containing environments, with Critical Pitting Temperature exceeding 50°C.

Providing higher strength than both austenitic and 22% Cr Duples Stainless Steels UNS S32760 (F55) is suited to a variety of applications in industries such as Chemical Processing, Oil & Gas, 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 S32760 Technical Information

Specifications of ALLOY S32760

Alloy 32760 to MLA-MPS-48V-BAR/FORG
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

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Purchase Specifications >
Alloy 32760 Bar and Forgings Purchase Specification

+ ALLOY S32760 Features

+ Applications of ALLOY S32760

Chemical Process Industry:

Nitric Acid Processes, Polypropylene Production, PVC Production, Dioxide, Caustic Evaporators, Equipment

Handling Organic and Fatty Acids

Marine Industry and Shipbuilding:

Propellers and Shafts, Rudders, Shaft Seals, Pumps, Bolts and Fasteners, Valves, Instrumentation, Oil and Chemical Tankers

Oil and Gas Industry:

Pumps, Valves, Pipe, Vessels, Wellhead Equipment, Subsea Equipment

Pollution Control:

Fans and pumps, Wet Scrubbers, Incinerators

Pulp and Paper Industry:

Black liquor heater tubes, Digester Blow Valves, Rotary Feed Valves, I.D.Fans, Brownstock Washers, Precipitators, Bleaching Components

Food Industry:

Sugar Cane Centrifuges, Corn and Vegetable processing plant

Agrochemicals:

Fertiliser Production (Wet phosphoric acid)

Civil Engineering:

Sewage Treatment

+ Forms of ALLOY S32760 Available

+ Chemical Specification of ALLOY S32760

+ Physical Properties of ALLOY S32760

+ Basic Properties of ALLOY S32760- Mechanical Properties

+ Machining Advice of ALLOY S32760 - Hot worked and precipitation hardened alloy

+ KEY Features of ALLOY S32760

+ Alloy Comparisons

Disclaimer
Data in this ALLOY S32760 page is provided solely for the purposes of distribution of information. Langley Alloys cannot make guarantees with respect to subject matter or accuracy of this information. Langley Alloys specifically disclaims all guarantees, expressed, implied or otherwise, including without limitation, all warranties of merchantability and fitness for a particular purpose. This publication may include technical inaccuracies or typographical errors. If errors are found, please make a notification via e-mail to: info@langleyalloys.com

Alloys	Bars & Sections	Hot & Cold Rolled Plate	Ingot & Billet	Forged Products	Sand Castings
FERRALIUM 255-SD50
FERRALIUM 255-SD40
FERRALIUM 255-3SF
FERRALIUM 255-3AF
FERRALIUM 255-3SC
FERRALIUM 255-FG46
ALLOY 2507
ALLOY S32760

Elements	C	Cr	Cu	Fe	Mo	Mn	N	Ni	P	S	Si	W
Minimum		24.0	0.5	REMAINDER	3.0		0.20	6.00				0.50
Maximum	0.030	26.00	1.0		4.0	1.0	0.30	8.00	0.030	0.010	1.00	1.00

Density (Kg.m^-3)	7810
Magnetic Permeability	33
Young’s Modulus (N/mm²)	199 x 10³
Fracture Toughness, KQ (MPa.m½)	98
Specific Heat, 20°C (J.Kg^-1.°K^-1)	475
Specific Electrical Resistance, 20°C (µO.m)	0.80
Thermal conductivity, 20°C (W.m^-1.°K^-1)	14.2
Mean coefficient of thermal expansion, 20-100°C (°K^-1)	11.1 x 10^-6

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

Additional Testing
ASTM G48A Corrosion test at 50°C	No pitting and weight loss <0.8g/m2
Ultrasonic Testing	According to ASTM A388
Ferrite Content	35%-55%
Microstructure	Microstructure certified free from grain boundary carbides, sigma, chi and laves phases

Operation	Cutting Speed m/min (ft/min)	Feed Rate mm/rev (in/rev)	Depth of cut mm (in)
Milling	40 (130)	0.05-0.13 mm/tooth 0.02-0.005 in/tooth	0.5-6.0 (0.02-0.25)
Drilling – 6.4mm (1/4”) dia	250rpm	0.075 (0.003)
Drilling – 12.7mm (1/2”) dia	250rpm	0.125 (0.005)
Drilling – 25.4mm (1”) dia	150rpm	0.28 (0.011)
Turning - Roughing	30- 45 (100-150)	0.20 – 0.38 (0.008-0.015)	3 (0.125)
Turning - Finishing	50- 60 (165-200)	0.13 – 0.20 (0.005-0.008)	0.5 (0.02)
Tooling	Milling/Turning: Carbide (SANDVIK GC 235, SECO T25M) Drilling: HSS, point angle 118°, chisel angle 120°

Alloy Comparisons	S31803	S17400(17-4PH)	S31254	718 (ST)	Alloy 32760
0.2% Proof Strength (N/mm²), minimum	450	1070	300	550 max	550
Corrosion Rate (mm.y^-1) Seawater	~1	~1	<0.01	<0.01	<0.01
Corrosion Rate (mm.y^-1) 10% sulphuric acid at 80°C	10	10	0.4	<0.15	<0.15
Corrosion Rate (mm.y^-1) Boiling 50% nitric acid	<0.15	<0.15	<0.15	<0.15	<0.15
Wear Properties related to Hardness (HRC)	RC38	RC38	RC20	RC20	RC28