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2205 STAINLESS STEEL TUBE

2205 stainless steel tube

2205 stainless steel tube is a duplex alloy that blends austenitic and ferritic properties, offering enhanced strength and corrosion resistance. Its composition includes 22%-23% chromium, 3%-3.5% molybdenum, 0.14%-0.2% nitrogen, and 4.5%-6.5% nickel, making it superior to 304 and 316 stainless steels in aggressive environments. Highly resistant to pitting, crevice corrosion, and stress corrosion cracking due to its high alloying elements, 2205's duplex structure delivers a yield strength roughly double that of traditional austenitic steels, allowing for lighter-weight designs. Primarily used in the oil and gas, chemical, pollution control, and marine sectors, 2205 stainless steel offers a cost-effective solution for high-stress, corrosive applications.

Standards and Specifications

STANDARDS
OD
WT
STANDARDS
OD
WT
mm
inch
mm
ga
ASTM A554
8-323
0.315"-12 3/4"
0.6-6.0
24ga-4ga
ASTM 249/269
15.88-203.2
0.6252"-8"
0.6-3.0
24ga-11ga
ASTM A270
15.88-203.2
0.6252"-8"
1.0-3.0
20ga-11ga
EN 10296-2
8-323
0.315"-12 3/4"
0.6-6.0
24ga-4ga
EN 10217-7
12-323
0.4724"-12 3/4"
0.6-6.0
24ga-4ga
EN 10357
13-204
0.5118"-8"
1.0-3.0
20ga-11ga

CHEMICAL COMPOSITION &
MECHANICAL PROPERTIES

CHEMICAL COMPOSITION AND MECHANICAL PROPERTIES

Typical Chemical Composition % (max values, unless noted)
Grade
C
Mn
P
S
Si
Ni
Cr
Mo
2205
0.03
2.0 max
0.03
0.02
1.00
4.5-6.5
22.0-23.0
3.0-3.5
Typical Mechanical Properties
Grade
Tensile Strength
Yield Strength
Elongation in 2 in. or (50mm)
Brinell Hardness
Rockwell Hardness
min
min
min
max
max
ksi
Mpa
ksi
Mpa
%
2205
90
620
65
450
25
290
90

Area we serve

OIL AND GAS INDUSTRY
2205 stainless steel tube offers a superior combination of strength and corrosion resistance, making it highly suitable for the challenging conditions of the oil and gas industry: Downhole Tube: Its resistance to corrosion and high strength is ideal for downhole tubing in sour wells containing hydrogen sulfide. Flowlines and Pipelines: 2205 tubes reliably transport oil and gas with high CO2 and H2S levels, crucial in subsea and sour service operations. Process Equipment: Valued in oil and gas processing for constructing separators, heat exchangers, and condensers, the alloy withstands corrosive fluids and high pressures. Structural and Storage Applications: With its high strength-to-weight ratio, 2205 is used in structural parts and storage tanks where durability and corrosion resistance are necessary.
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CHEMICAL INDUSTRY
2205 stainless steel tube can provide exceptional strength and corrosion resistance. Its enriched composition combats a wide range of chemical agents and excels in preventing localized corrosion like pitting and crevice corrosion. Processing Pipes: Ideal for transporting aggressive chemicals, 2205 offers reliable protection against chlorides and other corrosive elements in chemical processing settings. Heat Exchangers: The high-temperature corrosion resistance makes 2205 vital for heat exchangers in chemical processing. Reactors and Vessels: Its superior strength and corrosion resistance make it suitable for building reactors and pressure vessels facing harsh stress and corrosive conditions. Storage Tanks: 2205 is used in chemical storage tanks, providing a durable solution against corrosion and ensuring extended safety and integrity of operations.
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ENERGY INDUSTRY
The 2205 stainless steel tube, recognized for its duplex structure, combines strength with corrosion resistance, making it highly valued in the energy sector. Its composition, rich in chromium, nickel, and molybdenum, shields it from corrosive elements common in energy production and processing. Power Generation: Essential for components in power plants, especially in flue gas desulfurization units, 2205 is critical for its corrosion resistance. Renewable Energy Infrastructure: For offshore wind farms and tidal energy converters, its durability against saltwater corrosion makes 2205 ideal. Biofuel Processing Facilities: As bioenergy grows, 2205’s resistance to corrosive biomass by-products is crucial for infrastructure longevity. Geothermal Energy Production: The alloy's resilience to high temperatures and corrosive geothermal brines suits it for geothermal energy applications.
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NAVAL ARCHITECTURE AND OCEAN ENGINEERING
2205 stainless steel tube, with its exceptional corrosion resistance to chlorides and sulphates, is highly valued in marine industry. It offers superior mechanical strength and durability for maritime applications. Naval Architecture: Used in shipbuilding for parts like propeller shafts, rudders, and hull reinforcements, 2205's corrosion resistance minimizes failure risks in saltwater-exposed structures. Subsea Piping Systems: Essential for transporting hydrocarbons from offshore sites, providing a durable solution against the high pressures and corrosive conditions of the deep sea. Desalination Infrastructure: The tube's resistance to aggressive saline solutions ensures reliability in seawater desalination processes. Maritime Structural Elements: Chosen for constructing jetty pilings, offshore platforms, and support structures, 2205 prevents marine degradation.
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SEWAGE TREATMENT
2205 stainless steel tube is essential in sewage treatment plants due to its exceptional corrosion resistance, particularly in high-chloride settings. Its duplex structure combines the best of austenitic and ferritic steels, offering high yield strength and excellent resistance to stress corrosion cracking. Conveyance Systems: It's crucial for wastewater and sludge transport systems, outperforming other materials in chemical and chloride resistance. Thermal Equipment: Used in heat exchangers, 2205 stainless steel tube maintains energy efficiency and optimizes sewage processing with its thermal resilience. Chemical Injection Systems: Its resistance to a wide range of chemicals makes it suitable for sewage treatment dosing system components. Anaerobic Digesters: The tube's durability and corrosion resistance are advantageous in digesters, supporting the breakdown of organic waste.
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PULP AND PAPER INDUSTRY
In pulp and paper manufacturing, 2205 stainless steel tube is valued for its superior corrosion resistance, strength, and durability, well-suited for the industry's harsh environment where chlorides and caustic chemicals are prevalent. Chemical Processing Networks: Resilient against the harsh chemicals used in pulping and bleaching, the tube ensures process integrity and equipment longevity. Black Liquor Recovery Systems: Its excellent resistance to stress corrosion cracking underpins the reliability of recovery boilers that face high temperatures and corrosive substances. Bleaching Units: 2205 stainless steel tube's enhanced strength ideally suits it for the demanding conditions in pulp bleaching processes. Industrial Water Systems: The tube's corrosion resistance is critical for maintaining water quality in the paper production industry's various processes.
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2205 stainless steel tube FAQ

Duplex stainless steel is called duplex (or austenitic-ferritic) grades because their metallurgical structure consists of two phases, austenite (face-centered cubic lattice) and ferrite (body centered cubic lattice) in roughly equal proportions. They are designed to provide better corrosion resistance, particularly chloride stress corrosion and chloride pitting corrosion, and higher strength.
The combination of chromium, molybdenum, and nitrogen provides superb resistance to pitting, crevice, and general corrosion, especially in chloride-containing environments.
2205 stainless steel has excellent resistance to chloride-induced stress corrosion cracking due to its duplex structure (austenitic-ferritic), which offers a combination of high strength and high corrosion resistance.
The Pitting Resistance Equivalent Number (PREN) is a measure of the relative pitting corrosion resistance of stainless steel alloys in chloride-containing environments. The PREN of 2205 is typically between 34 and 36, which is high and indicates very good pitting and crevice corrosion resistance.
2205 duplex stainless steel has higher chromium (22%-23%) and molybdenum (3%-3.5%), but lower nickel (4.5%-6.5%) content than 304/316L, granting it superior corrosion resistance and strength, especially against chloride stress and pitting corrosion. While the cost of 2205 is often perceived as much higher than that of 316L, it typically varies within a narrow margin, generally not exceeding a difference of $3,000 per ton. However, duplex steel's more complex and challenging manufacturing process does make its tube fittings more expensive than those made from 304/316L.
2205 stainless steel tube is magnetic due to its ferrite content.
It is EN 1.4462.
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