2205 duplex stainless steel pipe is a high-strength, stainless and corrosion-resistant steel containing a two-phase structure of austenite and ferrite. Due to its excellent mechanical properties and corrosion resistance, 2205 duplex stainless steel pipe is widely used in many fields such as petroleum, natural gas, chemical industry, and ocean.
Main standards and grades:
American (ASTM) standard: ASTM A240, ASTM A789, ASTM A790Grade: UNS S32205, UNS S31803
European (EN) standard: EN 10088-2Grade: 1.4462
Japanese (JIS) standard: JIS G4304Grade: SUS 329J3L
Chinese (GB/T) standard: GB/T 21833Grade: 022Cr23Ni5Mo3N
German (DIN) standard: DIN 17440Grade: X2CrNiMoN22-5-3
2205 duplex stainless steel pipe, with its unique duplex structure, combines the advantages of austenitic and ferritic stainless steel, provides high strength, excellent corrosion resistance and good welding performance, and is an ideal material for many industrial and engineering applications. Its wide application in the fields of oil, natural gas, chemical industry, marine engineering, etc. reflects its reliability and durability in harsh environments.
Performance characteristics of 2205 duplex stainless steel pipe:
Excellent corrosion resistance:
2205 duplex stainless steel pipe stands out for its excellent corrosion resistance, especially in environments containing chloride ions, its corrosion resistance is even more outstanding. This characteristic makes it widely used in chemical industry, petroleum, marine engineering and other fields.
The austenite and ferrite phases in its duplex structure complement each other, making it able to resist the erosion of various chemical media and have good resistance to chloride ion stress corrosion cracking.
High strength:
The yield strength and tensile strength of 2205 duplex stainless steel pipe are higher than those of ordinary stainless steel, which makes it perform well in engineering projects subjected to high pressure and heavy loads. Its yield strength is twice that of austenitic stainless steel, a feature that enables designers to reduce weight when designing products, thereby reducing costs and improving economic benefits.
Good processability and plasticity:
2205 duplex stainless steel pipe is not only corrosion-resistant and high-strength, but also has good processability and plasticity. This allows it to be easily processed by cutting, welding and forming, reducing production costs. At the same time, its good plasticity also allows it to adapt to various complex shapes and size requirements.
Welding performance:
The welding performance of 2205 duplex stainless steel pipe is also very good, with a small linear heat tendency coefficient, no need for preheating before welding, no need for heat treatment after welding, and can be welded with 304 carbon steel. This further broadens its application range and convenience of use.
The production process of 2205 duplex stainless steel pipe mainly includes the following steps:
Smelting: Use electric furnace or converter for stainless steel smelting to obtain qualified molten steel.
Continuous casting: Pour the molten steel into the continuous casting machine, perform continuous casting operation, and obtain the required specifications of the billet.
Rolling: The steel billet is heated and rolled to make it meet the required shape and size.
Heat treatment: The steel pipe is heat treated to improve its mechanical properties and corrosion resistance.
Processing: The steel pipe is straightened, cut, bent and other processing operations to meet customer needs.
Inspection: The steel pipe is strictly inspected to ensure that its quality and specifications meet the requirements.
The main chemical composition of 2205 duplex stainless steel is as follows:
Chromium (Cr): 21-23%
Nickel (Ni): 4.5-6.5%
Molybdenum (Mo): 2.5-3.5%
Nitrogen (N): 0.08-0.20%
Carbon (C): ≤ 0.03%
Manganese (Mn): ≤ 2%
Silicon (Si): ≤ 1%
Phosphorus (P): ≤ 0.03%
Sulfur (S): ≤ 0.02%
Iron (Fe): Balance
The mechanical properties of 2205 duplex stainless steel are as follows:
Tensile Strength: ≥ 620 MPa
Yield Strength: ≥ 450 MPa
Elongation: ≥ 25%
Hardness:
Brinell hardness (HB): ≤ 293
Vickers hardness (HV): ≤ 310
Rockwell hardness (HRC): ≤ 31
Due to its excellent corrosion resistance and mechanical properties, 2205 duplex stainless steel pipes are widely used in the following fields:
Oil and gas industry: used for pipelines, downhole equipment, offshore platforms, etc. for conveying corrosive fluids.
Chemical industry: used for equipment such as reactors, storage tanks, heat exchangers and pipelines to handle corrosive media.
Marine engineering: used for seawater treatment equipment, ships, offshore platform structures and structures in marine environments.
Pulp and paper industry: used for bleaching equipment, storage tanks and pipelines, etc.
Environmental engineering: used for wastewater treatment equipment and discharge pipelines.
Architectural and structural engineering: used for bridges, buildings and other structures that require high strength and corrosion resistance.
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316 stainless steel plate is a higher common use stainless steel than 304&304L, it has 2.0 to 3.0% of Molybdenum content which provides better overal
Shandong Jialu International Trading Co., Ltd. is a metal material production, processing and sales enterprise integrating ductile iron pipes, steel pipes, steel plates, steel coils, steel wires, steel meshes, welding wires and welding rods.