Strength: 2205 stainless steel has high strength, making it suitable for applications that require high mechanical strength. It has a minimum tensile strength of 620 MPa and a minimum yield strength of 450 MPa.
Corrosion Resistance: 2205 stainless steel is known for its excellent corrosion resistance in a wide range of environments, including seawater, acidic, and chloride-containing environments. It is resistant to pitting, crevice corrosion, and stress corrosion cracking.
Weldability: 2205 stainless steel is known for its good weldability, making it a popular choice for welding, brazing, and soldering. It can be welded using common welding techniques, such as TIG, MIG, and stick welding.
Heat Resistance: 2205 stainless steel has good heat resistance up to 300°C (572°F). It can be used in high-temperature applications such as heat exchangers and exhaust systems.
Duplex Structure: 2205 stainless steel has a duplex structure, which means it has equal amounts of ferrite and austenite. This structure provides a combination of high strength and excellent corrosion resistance.
Machinability: 2205 stainless steel has moderate machinability due to its high strength and duplex structure. It can be machined using common machining techniques, but may require special tools and techniques.
Table 1 provides the compositional ranges for grade 2205 duplex stainless steel.
Table 1 - Composition ranges for 2205 grade stainless steels
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N | |
| 2205 (S31803) | MinMax | -0.030 | -2.00 | -1.00 | -0.030 | -0.020 | 21.023.0 | 2.53.5 | 4.56.5 | 0.080.20 |
| 2205 (S32205) | MinMax | -0.030 | -2.00 | -1.00 | -0.030 | -0.020 | 22.023.0 | 3.03.5 | 4.56.5 | 0.140.20 |
The typical mechanical properties of grade 2205 stainless steels are listed in the table below. Grade S31803 has similar mechanical properties to that of S32205.
Table 2 - Mechanical properties of 2205 grade stainless steels
| Grade | Tensile Str (MPa) min | Yield Strength 0.2% Proof (MPa) min | Elongation (% in 50mm) min | Hardness | |
| Rockwell C (HR C) | Brinell (HB) | ||||
| 2205 | 621 | 448 | 25 | 31 max | 293 max |
The physical properties of grade 2205 stainless steels are tabulated below. Grade S31803 has similar physical properties to that of S32205.
Table 3 – Physical properties of 2205 grade stainless steels
| Grade | Density (kg/m3) | Elastic Modulus(GPa) | Mean Co-eff of Thermal Expansion (μm/m/°C) | Thermal Conductivity (W/m.K) | Specific Heat 0-100°C( J/kg.K) | Electrical Resistivity (nΩ.m) | |||
| 0-100°C | 0-315°C | 0-538°C | at 100°C | at 500°C | |||||
| 2205 | 7800 | 190 | 13.7 | 14.2 | - | 19 | - | 418 | 850 |
Chemical Processing: 2205 stainless steel is widely used in the chemical processing industry due to its excellent corrosion resistance in acidic and chloride-containing environments. It is used in equipment such as tanks, piping, and heat exchangers.
Oil and Gas: 2205 stainless steel is used in the oil and gas industry for its excellent resistance to corrosion and high strength. It is used in equipment such as pipelines, valves, and pumps.
Marine Engineering: 2205 stainless steel is commonly used in marine engineering due to its excellent resistance to corrosion in seawater. It is used in equipment such as propeller shafts, offshore platforms, and seawater cooling systems.
Food Processing: 2205 stainless steel is used in the food processing industry due to its non-reactivity with food and excellent corrosion resistance. It is used in equipment such as storage tanks, conveyors, and processing equipment.
Construction: 2205 stainless steel is used in the construction industry for its high strength and excellent corrosion resistance. It is used in structures such as bridges, buildings, and tunnels.
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