Duplex Stainless Steel
Your Professional Duplex Stainless Steel Supplier
GNEE is a professional manufacturer and supplier of super stainless steel, duplex stainless steel, and super nickel alloy materials. Established in 2008, the company has a plant area of more than 35,000 square meters. With over 18 years of experience in supplying products to end users across various industries, GNEE achieves annual sales of approximately USD 600 million.
Our Offerings
GNEE provides a wide range of nickel-based alloy products, including plates, coils, tubes, bars, and fittings. Our products are made from premium materials and are designed to meet the highest standards of performance and durability. We also offer custom manufacturing services, allowing us to tailor our products to meet specific customer requirements.
GNEE Transport Packaging
Our standard export packaging is seaworthy, using waterproof paper and steel strapping, suitable for all types of transportation. Packaging can also be customized according to your requirements. Each package is securely supported and reinforced to ensure safe delivery.
Sales Market
Our products are exported to more than 20 countries, including Canada, Argentina, Spain, Brazil, Pakistan, South Korea, the UAE, Saudi Arabia, India, and others.
Duplex steels contain both ferritic and austenitic microstructures. They have a high chromium content and a moderate nickel content. They also caontain Molybdenum. F51 material is too low in nickel to produce a fully austenitic structure, thus producing the duplex microstructure (ferrite and austenite). The main advantage of duplex F51 / 1.4462 / UNS 31803 stainless steel is the combination of properties given by both the austenitic and ferritic structure (austeno-ferritic).
Duplex Stainless Mechanical Properties
|
Properties |
Metric |
Imperial |
|
Tensile strength (min) |
800 MPa |
110 ksi |
|
Yield strength (min) |
550 MPa |
83 ksi |
|
Elongation (min) |
20% |
20% |
|
Hardness, Brinell (max) |
32 |
32 |
Available Sizes And Specifications
|
2707 stainless steel pipe sizes and specifications |
|
|
Stainless steel seamless pipe |
Outside diameter: 4.0 - 1219mm, Thickness: 0.5 -100mm, Length: 24000mm |
|
Stainless steel welded pipe |
Outside diameter: 6.0 - 2800mm, Thickness: 0.3 -45mm, Length: 18000mm |
|
Stainless steel capillary pipe |
Outside diameter: 0.4 - 16.0mm, Thickness: 0.1 -2.0mm, Length: 18000mm |
|
Stainless steel welded sanitary pipe |
Outside diameter:8.0- 850mm, Thickness: 1.0 -6.0mm |
|
Stainless steel seamless sanitary pipe |
Outside diameter: 6.0- 219mm, Thickness: 1.0 -6.0mm |
|
Stainless steel square pipe |
Side Length: 4*4 - 300*300mm, Thickness: 0.25 - 8.0mm, Length: 18000mm |
|
Stainless steel rectangular pipe |
Side Length: 4*6 - 200*400mm, Thickness: 0.25 - 8.0mm, Length: 18000mm |
|
Stainless steel coil pipe |
Outside diameter: 0.4 - 16mm, Thickness: 0.1 - 2.11mm |
|
Standard |
ASTM A240/A480, ASTM B688, ASTM B463/SB463, ASTM B168/SB168, ASTM B443/SB443/B424/SB424B625/SB625 B575/SB575, JIS G4303,BS 1449, DN17441, G4305 |
|
Chemical Composition |
||||||||||
|
Cr |
Ni |
Mo |
C |
N |
Mn |
Si |
Cu |
P |
S |
Fe |
|
24.0-26.0 |
6.0-8.0 |
3.0-5.0 |
0.030 Max |
.24-.32 |
1.20 Max |
0.80 Max |
0.50 Max |
0.035 Max |
0.020 Max |
Balance |
Product application
Oil and Gas Industry: Stainless steel pipes are used in the oil and gas industry for transporting oil, gas, and other fluids. They are resistant to corrosion and can withstand high-pressure environments.
Chemical Industry: Stainless steel pipes are ideal for handling corrosive chemicals and fluids. They are used in chemical processing plants for conveying acids, alkalis, and other corrosive substances.
Food and Beverage Industry: Stainless steel pipes are preferred in the food and beverage industry due to their hygiene, cleanliness, and resistance to corrosion. They are used in processing and conveying food products.
Water Treatment: Stainless steel pipes are commonly used in water treatment plants for transporting potable water, wastewater, and chemicals. Their corrosion resistance makes them suitable for such applications.
Automotive Industry: Stainless steel tubes are used in the automotive industry for manufacturing exhaust systems, fuel lines, and structural components due to their resistance to heat and corrosion.
Medical Industry: Stainless steel tubes are used in the medical field for making surgical instruments, medical devices, and implants due to their biocompatibility and sterilizability.
Aerospace Industry: Stainless steel pipes and tubes are used in aircraft construction for fuel lines, hydraulic systems, and structural components due to their strength-to-weight ratio and resistance to high temperatures.
Heat Exchangers: Stainless steel tubes are commonly used in heat exchangers for transferring heat between fluids in various industrial processes.
Marine Industry: Stainless steel pipes are used in marine applications due to their resistance to corrosion from saltwater. They are used for boat fittings, marine structures, and offshore platforms.
FAQ