Alloy 2205 Stainless Steel
UNS S32205
Description
Alloy 2205 is a duplex (austenitic/ferritic) stainless steel that was developed to combat common corrosion problems encountered with the 300 series stainless steels. "Duplex" describes a family of stainless steels that are neither fully austenitic, like 304 stainless, nor purely ferritic, like 430 stainless. The structure of 2205 duplex stainless steel consists of austenite pools surrounded by a continuous ferrite phase, which provides resistance to stress corrosion cracking, pitting, and chlorine induced crevice corrosion. Extended elevated temperature exposure can embrittle 2205 stainless steel. Usage of 2205 duplex stainless steel should be limited to temperatures below 600 °F.
Chemical Component
| C | Mn | Si | P | S | Ni | Cr | Mo | N | Fe |
|---|---|---|---|---|---|---|---|---|---|
| 0.030% max | 2.0% max | 1.00% max | 0.03% max | 0.02% max | 4.5-6.5% | 22.0-23.0% | 3-3.5% | 0.14-0.20% | Balance min |
Basic Information
| Items | Alloy 2205 Stainless Steel |
|---|---|
| Catalog | ACMA-Fe-A047 |
| Density | 0.284 lb/in3, (7.86 g/cm3) |
| Modulus of Elasticity (E) | At 70 °F (20 °C): 29.0 x 103 ksi (200 GPa) |
| Coefficient of Expansion | 11.1 µin/in-°F (70-2000 °F); 14.0 µm/m-°C (0-300 °C) |
| Electrical Resistivity | 33.5 µohm-in, (85.1 µohm-cm) |
| Thermal Conductivity | 104 Btu-in/ft2-hr-°F, 15.0 W/m-°C |
Material Forms
Alfa Chemistry offers alloy 2205 stainless steel in a variety of forms, including Wire, Bar, Strip, Foil.
Typical Mechanical Properties
- Alloy 2205 stainless steel wire & bar
| Properties | Annealed | Spring |
|---|---|---|
| Heat Treatment | 1868-2050 °F (1020-1121 °C) | Stress Relieve 600-900 °F (316-482 °C) |
| Tensile Strength | 90-120 ksi (620-827 MPa) | 180 ksi min (1240 MPa) |
| Suggested Operating Conditions | -58 to 572 °F (-50 °C to 300 °C) | Up to 550 °F (288 °C) |
- Alloy 2205 stainless steel strip & foil
| Properties | Annealed | Spring Temper |
|---|---|---|
| Heat Treatment | 1868-2050 °F (1020-1121 °C) | Stress relieve as needed |
| Tensile Strength | 120 -150 ksi (825-1035 MPa) | 200 ksi (1300 MPa) |
| Suggested Operating Conditions | -58 °F to 572 °F (-50 to 300 °C) | Up to 550 °F (288 °C) |
Specifications
Wire & Bar: ASTM A313, A479, NACE MR0175/ISO 15156
Strip & Foil: ASTM A240, NACE MR0175/ISO 15156
Applications
- Industries: Chemical processing, oil & gas, nuclear power generation, food processing
- Specifically: Mixing tanks, heat exchangers, pressure vessels, extraction/distillation columns, pulp processing equipment, pipes, pumps, food processing equipment, springs
* Technical data included herein should be used as a guideline only, and should not be construed as maximum or minimum values for specification or for final design, or for a particular use or application. The data may be revised anytime without notice.
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