F55 Duplex Stainless Steel
As a leading supplier and manufacturer in China, GNEE Steel provides cost-effective nickel-based alloy products.
- Send E-mail: ss@gneesteel.com
Gnee Super Alloy (Tianjin) Co., Ltd. is one of the most professional manufacturers and suppliers of f55 duplex stainless steel in China. If you're going to wholesale high quality f55 duplex stainless steel made in China, welcome to get free sample from our factory. Good service and reasonable price are available.
F55 containing 25% chromium, 7% nickel, 3.6% molybdenum as well as copper, tungsten and nitrogen, it is a high-pren, high-alloy super duplex stainless steel suitable for corrosive environments. It is a super biphase steel with a ferritic-austenitic microstructure. The alloy is composed of approximately 40-50% ferrite in the annealed state. The super biphase microstructure has the high strength of ferritic steel grades while retaining the corrosion resistance of austenitic steel grades, making it suitable for a variety of applications in industries such as oil and gas, CPI (chemical processing industry) and Marine environments.
Common Trade Names:
F55 / S32760 / W.Nr:1.4501 Duplex Stainless Stee / X2CrNiMoCuWN25-7-4
Specifications：
ASTM A479 / ASTM A276 / ASTM A182–11A / NORSOK MDS D51 & D55 & D57 & D58 / ASTM A182 F55 / NACE MR01-75 (latest revision) / ISO 15156
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
Chemical Composition
| C | Si | Mn | P | S | Cr | Ni | Mo | Cu | N | W | PREN | Fe | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Min | - | - | - | - | - | 24 | 6 | 3 | 0.5 | 0.2 | 0.5 | 40 | 0 |
| Max | 0.03 | 1 | 1 | 0.03 | 0.01 | 26 | 8 | 4 | 1 | 0.3 | 1 | • | 0 |
Physical Properties
| Youngs Modulus N/mm2 | Density kg/dm³: | Magnetic Permeability |
|---|---|---|
| 199 x 10³ | 7.81 g/cm³ | 33 |
Mechanical Property – Annealed condition
| U.T.S | 0.2% Proof Stress | Elongation | Red of Area | CVN Impacts @ -46°C (-50°F) |
|---|---|---|---|---|
| 109 KSI Min | 80 KSI Min | 25 % | 45 % | 45 Joules |
| (750 N/mm2) | (550 N/mm2) | - | - | (33 ft-lbf) |
F55 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
FAQ
Q: How do you control quality ?
A: Mill Test Certification is supplied with shipment, Third Party Inspection is available. and we also get ISO,SGS,Alibaba Verified.
Q: What are the advantages of your company ?
A: We have many professionals, technical personnel, more competitive prices and best after-dales service than other stainless steel companies.
Q: How many coutries you already exported ?
A: Exported to more than 50 countries mainly from America, Russia, UK, Kuwait, Egypt, Turkey, Jordan,India, etc.
Q: Can you provide sample ?
A: Yes. We can provide the small samples in stock for free, as long as you contact us.Customized samples will take about 5-7 days.
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