Duplex F51 (UNS S31803) / F60 (UNS S2205): An Overview

Duplex stainless steel, designated as F51 (UNS S31803, 1.4462) or F60 (UNS S32205, 1.4462, SAF 2205), is a highly versatile material renowned for its exceptional corrosion resistance and mechanical properties. This alloy is composed of a balanced microstructure of austenite and ferrite phases, offering superior strength and durability compared to conventional stainless steels.

F60 Duplex Stainless Steel Round Bar Diameter

Duplex F51/F60 Product Forms

Duplex F51/F60 stainless steel is available in various product forms to cater to diverse industrial applications. These include:
1. ASTM A790 UNS S32205 Pipe: Duplex stainless steel pipes are widely used in industries such as oil and gas, chemical processing, and marine engineering due to their corrosion resistance and high strength. Common standards include ASTM A790/A789 for pipes. They come in various sizes and wall thicknesses (ANSI B36.19/ B36.10) to meet specific project requirements.

2. ASTM A240 Duplex Steel Plates: Duplex steel plates find applications in structural components, pressure vessels, and heat exchangers where corrosion resistance and strength are critical. Common standards include ASTM A240/SA 240 for plates.These plates are available in different dimensions and surface finishes to suit different fabrication needs.

3. ASTM A276 2205 Round Bars: Round bars made from duplex stainless steel are utilized in industries such as construction, automotive, and aerospace for manufacturing shafts, fasteners, and components subjected to high mechanical loads. Common standards include ASTM A276/SA 276 for round bars.They are available in various diameters and lengths to accommodate different machining processes.

4. ASTM A182 F51 F60 Flanges: Duplex steel flanges are essential components in pipeline systems, offering excellent corrosion resistance and leak-tight connections. Common flanges include Weld Neck Flanges, Socket Weld Flanges, blind Flanges, Threaded Flange, Lap Joint Flanges, Slip-On Flanges, etc. Sealing surface types include: FF, RF, RTJ. Standards include ASTM A182/SA 182 for flanges.
Dimensional standards: ASME B16.5, ASME B16.47 SERIES A, ASME B16.47 SERIES B, pressure range 150-2500#, PN2.5-PN100, size range 1/2-48 inch, DN10-DN4000.

5. Welded and Forged Fittings: Duplex stainless steel fittings, including elbows, tees, reducers, and couplings, are available in welded and forged forms. These fittings ensure reliable joint connections in piping systems operating in aggressive environments such as chemical processing plants and offshore platforms.

Duplex F51 F60 Applications

• Oil and gas exploration and production, including offshore platforms and subsea pipelines.
• Chemical processing plants for handling corrosive chemicals and high-temperature fluids.
• Marine engineering for shipbuilding, offshore structures, and seawater desalination.
• Power generation facilities, including nuclear and fossil fuel power plants.
• Food processing and pharmaceutical industries where hygiene and corrosion resistance are essential.
• Construction for structural components in bridges, buildings, and infrastructure projects.