UNS S32205 Duplex Stainless Steel: Twice the Strength of 316L vs AISI 316L Stainless Steel (UNS S31603): Marine-Grade Properties
Side-by-side engineering comparison of UNS S32205 Duplex Stainless Steel: Twice the Strength of 316L (ASTM A240/A789) and AISI 316L Stainless Steel (UNS S31603): Marine-Grade Properties (ASTM A240/A276). Compare mechanical properties, chemical composition, density, yield strength, international equivalents, and typical applications to select the right material for your project.
Quick Comparison
| Property | UNS S32205 Duplex Stainle | AISI 316L Stainless Steel |
|---|---|---|
| Standard | ASTM A240/A789 | ASTM A240/A276 |
| Category | Stainless Steel | Stainless Steel |
| Density | 7.80 g/cm³ | 8.00 g/cm³ |
| Yield Strength | 450 MPa (65 ksi) | 170 MPa (25 ksi) |
| Tensile Strength | 655 MPa (95 ksi) | 485 MPa (70 ksi) |
| Key Applications | UNS S32205 (<a href="https://ykwiki.com/materials/duplex-2205/">2205</a>) is a duplex stainless steel with a balanced fe... | <a href="https://ykwiki.com/materials/ss316l/">AISI 316L</a> (UNS S31603) is a low-carbon (≤0.03%) austenitic stainless ... |
International Equivalents
| UNS S32205 Duplex St Equivalents | AISI 316L Stainless Equivalents |
|---|---|
| EN 1.4462 | EN 1.4404 |
| X2CrNiMoN22-5-3 | X2CrNiMo17-12-2 |
| SUS329J3L | SUS316L |
| 022Cr22Ni5Mo3N | 022Cr17Ni12Mo2 |
| 2205 | AISI 316L |
How to Choose
| Choose UNS S32205 Duplex Stainle when... | 2205 duplex provides 450 MPa yield (2.6× 316L's 170 MPa) and immunity to chloride stress corrosion cracking. |
| Choose AISI 316L Stainless Steel when... | 316L is more economical for moderate chloride environments where high strength isn't required. |
Frequently Compared Questions
What is the main difference between UNS S32205 Duplex Stainless St and AISI 316L Stainless Steel (UNS?
UNS S32205 Duplex Stainless Steel: Twice the Strength of 316L (ASTM A240/A789) provides 450 MPa (65 ksi) yield strength at 7.80 g/cm³ density, while AISI 316L Stainless Steel (UNS S31603): Marine-Grade Properties (ASTM A240/A276) delivers 170 MPa (25 ksi) at 8.00 g/cm³. The choice depends on whether your application prioritizes double the strength + chloride SCC immunity or lower cost for moderate chloride environments.
Can UNS S32205 Duplex Stainless St be substituted for AISI 316L Stainless Steel (UNS?
In many applications, these materials can be cross-referenced, but direct substitution should always be verified against specific project specifications, especially for double the strength + chloride SCC immunity, lower cost for moderate chloride environments, and operating environment. Consult your engineer of record.