Home » UNS S32550 vs AISI 2205 (1.4507 vs 1.4462)
UNS S32550 vs AISI 2205 (1.4507 vs 1.4462)
| Property | UNS S32550 (1.4507 / F61) | AISI 2205 (1.4462 / S31803–S32205) |
| COMPOSITION (%) |
| Cr (chromium) | 24 – 27 | 21 – 23 |
| Ni (nickel) | 4.5 – 6.5 | 4.5 – 6.5 |
| Mo (molybdenum) | 2.9 – 3.9 | 2.5 – 3.5 |
| N (nitrogen) | 0.1 – 0.25 | 0.08 – 0.2 |
| Cu (copper) | 1.5 – 2.5 | — |
| Mn (manganese) | 0 – 1.5 | 0 – 2 |
| W (tungsten) | — | — |
| PHYSICAL |
| Density (g/cm3) | 7.73 – 7.82 | 7.8 – 7.82 |
| MECHANICAL |
| Young’s Modulus (GPa) | 195 – 205 | 195 – 205 |
| Yield Strength (MPa) | 520 – 580 | 460 – 510 |
| Tensile Strength (MPa) | 730 – 810 | 640 – 950 |
| Elongation (% strain) | 23 – 27 | 20 – 25 |
| Hardness – Brinell (HB) | 240 – 264 | 278 – 308 |
| Hardness – Rockwell C | 28 | 22 – 31 |
| Fatigue Strength @ 10^7 (MPa) | 246 – 271 | 261 – 289 |
| Fracture Toughness (MPa*m^0.5) | 192 – 212 | 144 – 195 |
| THERMAL |
| Melting Point (C) | 1400 – 1450 | 1400 – 1450 |
| Max Service Temp (C) | 335 – 365 | 335 – 365 |
| Min Service Temp (C) | -60 – -50 | -60 – -50 |
| Thermal Conductivity (W/m*C) | 13.3 – 17 | 14.4 – 15.6 |
| CORROSION RESISTANCE |
| PREN | 35.2 – 43.9 | 30.5 – 37.8 |
| Pitting & Crevice Corrosion | Very High (>40) | High (30-40) |
| Stress Corrosion Cracking | Susceptible | Not Susceptible |
| Sea Water | Excellent | Good |
| Sour Oil & Gas | Good | Good |
| PROCESSING |
| Machining Speed (m/min) | 16.5 | 15.8 |
| Weldability | Good (MIG/plasma/SAW/TIG: Excellent) | Good (MIG/plasma/SAW/TIG: Good) |
| Metal Casting | Unsuitable | Unsuitable |
| Metal Hot Forming | Acceptable | Acceptable |
| Carbon Equivalency | 1.12 – 1.48 | 0.942 – 1.24 |
| NOTES |
| Generation / Notes | 2nd generation duplex | 2nd generation duplex |
| Typical Uses | — | — |
