2205 stainless steel pipe is better than 316.
The yield strength of 2205 duplex stainless steel is more than twice that of 316L, and it has the plastic toughness required for molding. 2205 duplex stainless steel has greater resistance to stress corrosion cracking than 316L stainless steel. 2205 duplex stainless steel has high strength and local corrosion resistance, and its wear and corrosion resistance is better than 316L stainless steel pipe.
| Material | 316L Stainless Steel | 2205 Duplex Stainless Steel |
|---|---|---|
| Austenitic/Ferritic | Austenitic | Duplex (Austenitic-Ferritic) |
| Chemical Composition | Chromium (Cr): 16-18% | Chromium (Cr): 21-23% |
| Nickel (Ni): 10-14% | Nickel (Ni): 3-5% | |
| Molybdenum (Mo): 2-3% | Molybdenum (Mo): 2-3% | |
| Carbon (C): ≤0.03% | Carbon (C): ≤0.03% | |
| Mechanical Properties | Lower strength compared to 2205 | Higher strength compared to 316L |
| Corrosion Resistance | Good resistance to corrosion in most environments | Excellent resistance to chloride stress corrosion cracking |
| Lower resistance to chloride environments | ||
| Workability | Good formability and weldability | Good formability and weldability |
| Applications | Chemical processing, food processing, medical equipment | Chemical processing, oil and gas, desalination plants, offshore applications |
