UNS S32760 - 1.4410
Wst. 1.4410/1.4501
UNS 32750/S32760
Stock program: 6 – 25 mm OD / 1/4“ – 1” OD
Specification: ASTM A 789/ASME SA 789/EN ISO 1127 D4/T3 / EN 10216-5/NACE MR0175/PED 97/23 EC
Maximum service temperature: 300°C / 572°F
Super duplex is a material with an approximately equal amount of austenite and ferrite and is characterized by high Chromium and Molybdenum contents. These combine excellent corrosion resistance with high strength. Mechanical properties are approximately double those of singular austenitic steel and resistance to crevice corrosion and stress corrosion cracking is superior compared to the alloys 316L, 317L or duplex 2205 in chloride solutions. Also, in ambient and subzero (down to minus 50°C ) notch ductility is good. The super duplex 2507 is the most widely used grade.
Characteristics
- High resistance to chloride pitting and crevice corrosion
- Very high mechanical and physical properties
- Good weldability and workability
- Low rate of thermal expansions
- Good general corrosion resistance
Market applications:
- Chemical and Petrochemical industry
- Offshore oil and gas industry
- Subsea centralizes
- Stream vessels
- Heat exchanges
Technical details
Technical composition (%) | Fe | Cr | Ni | Mo | Mn | Si | N | C | Cu | P | S | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
S32750 | min | Bal. | 24 | 6.0 | 3.0 | 1.2 | 0.80 | 0.24 | 0.030 | - | - | - |
max | - | 26 | 8.0 | 5.0 | 1.2 | 0.80 | 0.32 | 0.030 | - | - | - | |
S32760 | min | Bal. | 24.0 | 6.0 | 3.0 | 1.00 | 1.00 | 0.20 | 0.050 | 0.50 | - | - |
max | - | 26.0 | 8.0 | 4.0 | 1.00 | 1.00 | 0.30 | 0.050 | 1.00 | 0.035 | 0.015 |
Mechanical properties | S32750 | S32760 |
---|---|---|
Tensile strenght (mpa, min) | 800 | 750 |
Yield strength (0.2% offset mpa, min) | 550 | 550 |
Elongation (%, min) | 25 | 25 |
Density / weight (g / cm3 / kg) | 7.9 | 7.9 |