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Alloy 32760 (UNS S32760)

Specifications:

  • 1.4501
  • ASTM A276/A476
  • UNS S32760 (Super Duplex 32760)
  • ASME A182 F55

Description:

Alloy 32760 is a super duplex stainless steel supplied in the hot worked and solution annealed condition. As a super duplex stainless steel, it combines the desirable aspects of both austenitic and ferritic grades. The higher chromium, molybdenum and nitrogen contents result in a Pitting Resistance Equivalent number (PREN) of >40, providing pitting and crevice corrosion resistance superior to austenitic and duplex stainless steels in almost all corrosive media, and a Critical Pitting Temperature exceeding 50°C   nb. versions of the PREN formula also include W as a positive influence on overall pitting resistance.

Specifications
ASTM A182 F55
ASTM A276 F55
ASTM A479 F55
AISI F53
WS 1.4501
X2CrNiMoCuWN25.7.4
AFNOR Z3CND25.06Az
EN10088-3
UNS S32760
ZERON 100
NACE MR01-75
PED 97/23/EC

It provides higher strength than both austenitic and 22% Cr duplex stainless steels, and is listed in NACE MR 0175 for sour service and ASME for pressure vessel applications.

Key Features:

  • Excellent corrosion resistance in a wide variety of corrosive chemicals
  • Pitting Resistance Equivalent number (PREN) of >40
  • Outstanding resistance to pitting and crevice corrosion in seawater and other chloride containing environments
  • Critical Pitting Temperature exceeding 50°C
  • High strength compared to austenitic and 22%Cr duplex stainless steels
  • Excellent ductility and impact strength at both ambient and sub-zero temperatures
  • High resistance to abrasion, erosion and cavitation erosion
  • Excellent resistance to stress corrosion cracking in chloride containing environments
  • Listed in NACE MR 0175 for sour service
  • ASME Approval for Pressure Vessel application

Applications:

  • Process industry components in nitric acid, dioxide, polypropylene & PVC production, caustic evaporators
  • Equipment handling organic & fatty acids
  • Marine industry and shipbuilding propellers, shafts, rudders, shaft seals, pumps, bolts, fasteners, valves, instrumentation
  • Oil and chemical tankers
  • Oil & Gas industry pumps, valves, pipe, vessels, wellhead equipment, subsea equipment
  • Pollution control systems, fans and pumps, wet scrubbers, incinerators, flue gas desulphurisation (FGD)
  • Pulp & paper industry components such as black liquor heater tubes, digester blow valves, rotary feed valves, I.D.fans, brownstock washers, precipitators, bleaching components
  • Food Industry applications including sugar cane centrifuges, corn and vegetable processing plant
  • Agrochemicals production such as fertilisers (based on wet phosphoric acid)
  • Sewage treatment, seawater cooling, desalination plants

Super Duplex Steel F55 (UNS S32760)

Super Duplex Steel F55 Technical Data Sheet 

Availability 
Super Duplex F55 is available in Bar from 6mm dia to 270mm dia and Forging Stock. For all stock availability contact Sales.

Super Duplex Steel F55 Chemical Composition:

Cr Ni Mo Co Nb (+Ta) Ti V W Cu C Mn N Si P S Fe Al
Min 24.00 6.00 3.00 0.50 0.50 0.20 0.10
Max 26.00 8.00 4.00 1.00 1.00 1.00 0.30 0.80 0.025 0.005 Bal
Chemical Composition Limits
Weight% C Mn P S Si Cr Ni Mo N W
Super Duplex F55 0.03 max 1.00 max 0.03 max 0.01 max 1 max 24-26 4.5-6.5 3-4 0.25 0.08-0.20

F55 Duplex is the most common super duplex grade it has an enhanced pitting and crevice corrosion resistance compared with the ordinary austenitic or duplex types.

Super Duplex Steel F55 Mechanical Properties: Typical Mechanical Properties 

0.2% Proof Stress 550 N/mm2 79.8 ksi
Tensile Strength 750 N/mm2 108.8 ksi
Elongation, 5.65√S0 25%
Reduction of area 45%
Hardness (Brinell) 270 max.
Impact Strength (Room Temp) 80J 59 lb.ft
Impact Strength (-46oC) 60J av (45J min) 44 lb.ft av (33 lb.ft min)
Alloy Tensile Strength N/mm² Yield Strength 0.2% N/mm² Elongation 
Hardness HB
Super Duplex F55 860 720 min 16 min 270 max

Super Duplex Steel F55 Physical Properties:

Density (Kg/m3) 7810
Magnetic Permeability (20°C) 33
Young’s Modulus (kN/mm2) 199
Specific Electrical Resistance, 20°C (µΩ.m) 0.8
Mean coefficient of thermal expansion, 20-300°C (m/m/oC) 11.1 x 10-6
Specific Heat, 20°C (J/kg.K) 475
Thermal conductivity, 20°C (W/m.K) 14.2
Fracture Toughness, kQ (MPa/m2) 98

Notes:

  1. Testing shall be carried out in accordance with ASTM A370 or EN ISO 6892-1 (tensile), EN ISO 6506-1 (hardness)
  2. Minimum properties quoted (tested at room temperature in a longitudinal direction)
  3. Testing performed on each melt of material per heat treatment batch
  4. Hardness shall be in accordance with NACE MR 1075 with a maximum HRC of 2
  5. ASTM G48A corrosion test (at 50°C) no pitting and < 3.0 g/m2 weight loss (ASTM specification < 4.0 g/m2)
  6. Ferrite content 35-55%
  7. Microstructure certified free from grain boundary carbides, sigma, chi and laves phases
TYPES OF ASTM A182 F55 FITTINGS

forged duplex stainless NPT threaded half-coupling union cross tee 90deg elbow 45deg elbow,socket welding/weld SW coupling pipe fittings screwed reducing insert boss cross cap, swage nipple union plug bushing Weldolet, Sockolet, Threadolet, Nippolet flangeolet

  • Size: 1/8"-4"
  • Ratings: 3000, 6000, 9000
  • Standard: ASME B16.11, MSS SP-97, MSS SP-95, MSS SP-79, MSS SP-83
  • Fittings socket welding or NPT threaded, forging according ASTM A / ASME SA182, ASME B16.11
  • (Union acc. MSS SP-83, Outlets acc. MSS SP-97) With certificate to EN10204/3.1
  • duplex Stainless ASME SA182 ASTM A182 F20, F44, F45, F46, F47, F48, F49, F56, F58, F62, F63, F64,
  • a182 F904L, F50, F51, F52, F53, F54, F55, F57, F59, F60, F61, F65,
  • UNS N08020, S31254, S30815, S30600, S31725, S31726, S34565, S33228, S31266, N08367, S32615, S30601, N08904, S31200, S31803,S32950, S32750, S39274, S32760, S39277, S32520, S32205, S32550, S32906
TYPES OF ASTM A182 F55 FLANGES
Astm A182 F55 Flanges Duplex Steel F55 Flanges
ASTM A182 F55 Slip On Flanges ASTM A182 F55 Weld Neck Flanges
Duplex Steel F55 Loose Flanges ASTM A182 F55 Screwed Flanges Exporter
SS A182 F55 BLRF Flanges ASTM A182 F55 Plate Flanges Exporter
SS A182 F55 Threaded Flanges Stockist SS A182 F55 Industrial Flanges Manufacturer
ASTM A182 F55 Socket Weld Flanges ASTM A182 F55 Flanges Supplier
Duplex Steel F55 Pipe Fittings Duplex Steel A182 Buttweld Fittings
F55 Long Weld Neck Flanges Grade F55 SS Awwa Flanges
Duplex Steel High Yeild F55 Body Flanges ASTM 182 Blind Flanges
SS A182 F55 Threaded Flanges Duplex Steel Paddle Blank Flanges
A182 SS Paddle Spacer Flanges Manufacturer F55 Duplex Steel Spectacle Blind Flanges
ASTM A182 F55 Ring Joint Flanges ASTM, ASME Flanges
Duplex Steel F55 RTJ Flanges Stock Holder ASTM A182 F55 Forged Flanges

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