About Alloy
Super Duplex F55 is a highly corrosion-resistant stainless steel alloy that belongs to the family of duplex stainless steels. It is known for its exceptional strength and resistance to a wide range of corrosive environments, making it suitable for demanding applications in industries such as oil and gas, chemical processing, and marine engineering.
Super Duplex F55 is composed of a balanced mixture of austenite and ferrite crystal structures, which gives it superior mechanical properties compared to conventional stainless steels. The F55 grade specifically refers to the composition and characteristics of this particular super duplex stainless steel alloy.
The key feature of Super Duplex F55 is its excellent resistance to various forms of corrosion, including pitting, crevice corrosion, and stress corrosion cracking. This makes it highly suitable for use in aggressive environments where exposure to chlorides, acids, and other corrosive substances is common. It also exhibits high tensile and yield strengths, as well as good toughness and ductility.
The superior properties of Super Duplex F55 make it an ideal choice for critical applications where durability, reliability, and cost-effectiveness are paramount. Its ability to withstand harsh environments, high temperatures, and high pressures while maintaining its mechanical integrity makes it a preferred material for demanding industrial applications.
Product Form & Standard
Forging: ASTM A182
Bar/Rod ASTM A276, ASTM A479
Chemical Composition
| 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 |
Mechanical Properties
| Alloy | Tensile Strength N/mm² | Yield Strength 0.2% N/mm² | Elongation | Hardness HB |
| Super Duplex F55 | 860 | 720 min | 16 min | 270 max |
Application
● Pumps
● Valves
● Chokes
● Bolting
● Pipework/flanges
● Connectors and manifolds
● Oil and gas industry
● Equipment in defence, chemical and marine industries
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