UNS S32550 vs AISI 329 ( 1.4507 vs S32900 )
| Property | UNS S32550 (1.4507 / F61) | AISI 329 (S32900 · 1st generation) |
| COMPOSITION (%) | ||
| Cr (chromium) | 24 – 27 | 23 – 28 |
| Ni (nickel) | 4.5 – 6.5 | 2 – 5 |
| Mo (molybdenum) | 2.9 – 3.9 | 1 – 2 |
| N (nitrogen) | 0.1 – 0.25 | — |
| Cu (copper) | 1.5 – 2.5 | — |
| Mn (manganese) | 0 – 1.5 | 0 – 1 |
| W (tungsten) | — | — |
| PHYSICAL | ||
| Density (g/cm3) | 7.73 – 7.82 | 7.7 – 7.9 |
| MECHANICAL | ||
| Young’s Modulus (GPa) | 195 – 205 | 189 – 204 |
| Yield Strength (MPa) | 520 – 580 | 500 – 600 |
| Tensile Strength (MPa) | 730 – 810 | 650 – 795 |
| Elongation (% strain) | 23 – 27 | 20 – 35 |
| Hardness – Brinell (HB) | 240 – 264 | 130 – 150 |
| Hardness – Rockwell C | 28 | 0 – 4 |
| Fatigue Strength @ 10^7 (MPa) | 246 – 271 | 316 – 365 |
| Fracture Toughness (MPa*m^0.5) | 192 – 212 | 71 – 110 |
| THERMAL | ||
| Melting Point (C) | 1400 – 1450 | 1380 – 1450 |
| Max Service Temp (C) | 335 – 365 | 740 – 787 |
| Min Service Temp (C) | -60 – -50 | -150 |
| Thermal Conductivity (W/m*C) | 13.3 – 17 | 15 – 21 |
| CORROSION RESISTANCE | ||
| PREN | 35.2 – 43.9 | 26.3 – 34.6 |
| Pitting & Crevice Corrosion | Very High (>40) | High (30-40) |
| Stress Corrosion Cracking | Susceptible | Susceptible |
| Sea Water | Excellent | Moderate |
| Sour Oil & Gas | Good | Moderate |
| PROCESSING | ||
| Machining Speed (m/min) | 16.5 | 25.6 |
| 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 | 0.867 – 1.29 |
| NOTES | ||
| Generation / Notes | 2nd generation duplex | 1st generation duplex, no longer produced much |
| Typical Uses | — | Processing of potentially corrosive liquids (chemicals/oil/beverages/sewage); structural uses in corrosive environments e.g. nuclear plants, ships, offshore oil installations, underwater cables and pipes |
Cast Grades
Wrought Grades
Wrought · Duplex
UNS S32003 / AL 2003
Material Data Sheet
Wrought · Duplex
LDX 2101
Material Data Sheet
Wrought · Duplex
AISI 329
Material Data Sheet
Wrought · Duplex
AISI 2205
Material Data Sheet
Wrought · Duplex
UNS S32550
Material Data Sheet
Wrought · Duplex
UNS S32760
Material Data Sheet
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