Duplex F71 Sheet ,Plate,coils Manufacturer, Supplier and Exporter in India
Duplex F71 Sheet ,Plate,coils, Duplex F71 Sheet ,Plate,coils Manufacturer, Duplex F71 Sheet ,Plate,coils Supplier and Exporter, Duplex F71 Sheet ,Plate,coils Exporter
Sumer Metal Industries Pvt. Ltd. is an established Indian producer and exporter of duplex F‑71 (also known as UNS S31803/S32205, ASTM A182 F51/F60) stainless steel in forms including sheet, plate, and coil. They serve global markets, especially oil & gas, chemical processing, desalination, marine, and offshore applications. Their product range is available in multiple thicknesses and coil widths
Duplex F‑71 combines roughly 50% ferrite and 50% austenite microstructure, delivering excellent corrosion resistance and mechanical strength. It is ideal for chlorides, seawater, sulfide-bearing environments—commonly used in pressure vessels, heat exchangers, piping systems, and structural components
Duplex F71 stainless steel, also referred to as UNS S31803 or S32205, is a two-phase alloy combining the beneficial properties of austenitic and ferritic stainless steels. Manufactured by Sumer Metal Industries Private Limited, Duplex F71 sheets, plates, and coils are known for their superior strength, excellent corrosion resistance, and resistance to stress corrosion cracking—particularly in aggressive environments such as chloride-rich and marine applications. These products are widely demanded in sectors like oil and gas, desalination, power generation, chemical processing, and marine construction.
Duplex F71 Sheet ,Plate,coils Specifications
| Product | Duplex F71 (UNS S31803 / S32205) |
|---|---|
| Standards | ASTM A240, ASTM A182, ASME SA240, SA182 |
| Material Grade | F51 / S31803 / S32205 |
| Product Forms | Sheets, Plates, Coils |
| Thickness Range | 0.5 mm – 100 mm |
| Width Range | 10 mm – 2000 mm |
| Finish Available | 2B, No.1 (HRAP), No.4, BA, Mirror, Custom |
| Manufacturing Type | Hot Rolled / Cold Rolled / Annealed |
| Certifications | EN 10204 3.1 / 3.2, NACE MR0175, IBR, PED |
| Applications | Pressure vessels, desalination plants, offshore platforms, heat exchangers, pipelines, chemical tanks |
Chemical Composition of Duplex F71 Sheet ,Plate,coils
| Element | % Composition (Typical Range) |
|---|---|
| Carbon (C) | ≤ 0.030% |
| Manganese (Mn) | ≤ 2.00% |
| Silicon (Si) | ≤ 1.00% |
| Phosphorus (P) | ≤ 0.030% |
| Sulfur (S) | ≤ 0.020% |
| Chromium (Cr) | 21.0 – 23.0% |
| Nickel (Ni) | 4.5 – 6.5% |
| Molybdenum (Mo) | 2.5 – 3.5% |
SS 904L is a super austenitic stainless steel with low carbon content and high levels of nickel, molybdenum, and copper, giving it outstanding resistance to sulfuric acid, chloride-induced pitting, and stress corrosion cracking. Sumer Metal’s 904L coils exhibit excellent formability, weldability, and durability in harsh and corrosive environments. These coils are available in hot rolled (HR) and cold rolled (CR) forms and are used in fabricating heat exchangers, tanks, piping systems, and structural components.
