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Stainless Steel 2205 Duplex
Material Type
Metal
Material Name
Stainless Steel 2205 Duplex
Alternative Names
X2CrNiMoN 22.5.3 | 1.4462 | S32205/S31803
Process Compatibility
CNC Milling, CNC Turning
introduction
Stainless Steel 2205 Duplex in CNC Machining
Stainless Steel 2205 Duplex is a corrosion-resistant alloy made up of chromium, nickel, molybdenum, and manganese.
It is a type of stainless steel known for having a dual-phase structure composed of roughly equal parts of austenite (face-centered cubic lattice) and ferrite (body-centered cubic lattice). Its composition gives excellent corrosion resistance. In CNC machining, this alloy showcases good machinability. With higher strength than traditional stainless steel, it is used in the oil and gas industry, chemical processing, and marine engineering. When machining, we use carbide tools and maintain proper cooling for efficient processing and prolonged tool life.
Heat treatment is generally unnecessary when post-machining this alloy, but specific applications might require annealing. This alloy is easy to weld, allowing for flexible design and construction. Stainless Steel 2205 Duplex's good thermal performance and acceptable electrical properties enhance its adaptability. Though not suitable for anodizing, we have other post-processing options, like hardening for customized applications. We always adhere to guidelines ensuring optimal results in CNC machining with Stainless Steel 2205 Duplex.
Properties
Properties Table of Stainless Steel 2205 Duplex
| MECHANICAL PROPERTIES | |
|---|---|
| Ultimate Tensile Strength | 620-700 MPa |
| Yield Strength | 425-500 MPa |
| Young's Modulus(Elasticity) | 195-205 GPa |
| Elongation at Break | 14-28 % |
| Physical Properties | |
| Corrosion Resistance | Excellent |
| Magnetism | Magnetic |
| UV Resistance | Excellent |
| Weldability | Good |
| Thermal Properties | |
| Maximum Service Temperature | 335-365 °C |
| Thermal Expansion Coefficient | 13.5-18.2 x 10^(-6)/°C |
| Thermal Conductivity | 14.4-15.6 W/(m·°C) |
| Electrical Properties | |
| Electrical Resistivity | 78.4-81.6 μΩ*cm |
TECHNOLOGY OVERVIEW
Basic Knowledge of Stainless Steel 2205 Duplex
What is Stainless Steel 2205 Duplex?
Stainless Steel 2205 Duplex is a duplex stainless steel alloy with a composition of about 22% chromium, 5-6% nickel, 3% molybdenum, and a balance of iron.
The term "duplex" refers to its dual-phase microstructure, combining both austenitic (chromium-nickel) and ferritic (chromium-manganese) phases. This combination provides excellent corrosion resistance, that is why it can be used in harsh conditions like chemical processing and marine environments.
Advantages of Stainless Steel 2205 Duplex
Excellent corrosion resistance
High strength
Good weldability and workability
Improved stress corrosion cracking resistance
Cost-effective compared to some high-nickel alloys
Enhanced durability in harsh environments
Superior pitting and crevice corrosion resistance
Good fatigue strength
Wide range of applications in various industries
Long-lasting and low maintenance
Applications of Stainless Steel 2205 Duplex
Chemical and petrochemical processing equipment
Oil and gas industry components, including pipelines and offshore platforms
Desalination plants for seawater processing
Marine engineering and shipbuilding
Food processing equipment due to its corrosion resistance
Structural components in construction, particularly in corrosive environments
Power generation equipment, such as gas turbines and nuclear reactors
Automotive components for durability and corrosion resistance.
FAQ
Machining Stainless Steel 2205 Duplex Buying FAQ
Welding 2205 duplex stainless steel requires proper preheating, maintaining interpass temperatures, and using suitable filler materials like ER2209. Use duplex-compatible welding techniques, such as GTAW (TIG) or GMAW (MIG), for optimal results.
AWS ER 309L welding wire is suitable for welding 2205 duplex stainless steel to austenitic stainless steel 316L using the gas tungsten arc welding (GTAW) process.
They are not recommended for applications below -50°C because of reduced impact toughness at very low temperatures. Also, usage above 250°C is restricted due to the risk of harmful intermetallic phase formation during prolonged exposure. Additionally, it may be more challenging to form and machine compared to austenitic stainless steel.
Duplex 2205 has excellent corrosion resistance, but it is not completely immune to rust. Prolonged exposure to aggressive environments may lead to surface rusting.
Other Materials
Stainless Steel 416
Stainless Steel 416 belongs to the martensitic stainless steel family. It is known for its strength and hardness.
More info about Stainless Steel 416
Stainless Steel 316
Stainless Steel 316, also known as marine-grade stainless steel, is a popular material in CNC machining due to its good mechanical properties
More info about Stainless Steel 316
Stainless Steel 304
Stainless Steel 304 is a commonly used material in CNC machining. It is known for its corrosion resistance and mechanical properties.
More info about Stainless Steel 304
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