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F55 Steel ( UNS S32706 / 1.4501 )
F55 Steel ( UNS S32706 / 1.4501 ) is among the most common super duplex grade in the market. UNS S32760 is a duplex stainless steel especially designed for service in aggressive chloride-containing environments and has additions of W and Cu compared to UNS S32750. It has very good resistance to localized corrosion and stress corrosion cracking in combination with high mechanical strength.
Material grades and equivalents：UNS S32706 / 1.4505 / F55 / S27603 / 022Cr25Ni7Mo4WCuN / X2CrNiMoWN25-7-4
The characteristic features of high strength and corrosion resistance exhibited by the dual microstructure (50% Austenite, 50% Ferrite) associated with Duplex Stainless Steels, are enhanced by a further addition of Chromium (to 25%), and also Tungsten and Copper.
The alloy’s pitting and Crevice Corrosion resistance is better than Standard F51 duplex, The pitting index (PREN) is increased to 40 min from standard F51 Duplex value of 33 min.
Thin sections (Tubulars) are capable of being cold worked to give yield strength of 105 KSI min.
To optimise mechanical properties, avoid clinking, and to avoid deleterious intermetallics within the microstructure; special high temp forming and heat treatment control practices must be followed during processing.
F55 Duplex Stainless SteelChemical composition:
F55 Duplex Stainless Steel Mechanical Properties:
Yield strength Rp0.2,
Tensile strength Rm,
Impact, Charpy-V, -46ºC
PLATE CR (COIL)
750 – 1000
PLATE HR (COIL)
750 – 930
750 – 930
F55 Duplex StainlessSteel Physical properties:
Magnetic Permeability (20°C)
Young’s Modulus (kN/mm2)
Specific Electrical Resistance, 20°C (µΩ.m)
Mean coefficient of thermal expansion, 20-300°C (m/m/oC)
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
Shanghai HY Industry Co., Ltdhas international first-class material production equipment such as high temperature alloy isothermal forging production line, CONSARC vacuum melting furnace, VAR vacuum arc remelting furnace etc., with strong professional ability and highly responsible management team. We are a member of China Application of nuclear energy materials, Member of the International Council of the Aeronautical Sciences，China Electronic Materials Industry Association Magnetic Materials Branch. Years of experience in special alloy. When you have superalloy material inquiry, please contact us without hesitation. Shanghai HY Industry Co., Ltd is Corrosion & fatigue nickel alloy professional manufacturer,We will provide you with sincere and thoughtful service.
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