Our stock of Super Duplex 32760 can be supplied in sheet, plate, or bar forms, cut to specific requirements and comes with the Jain Steels Metal quality certification.
The following are the properties of S32760 Super Duplex:
- Ferritic-austenitic stainless steel.
- Excellent corrosion resistance against general corrosion, stress corrosion cracking, corrosion fatigue, pitting, crevice and erosion corrosion and possessing very high mechanical strength properties.
- Good weldability, post weld heat treatment not necessary.
- Max. Temperature for long periods of service: 280°C (536°F) / (300°C/572°F possible for short periods).
- Surface condition for optimum corrosion resistance: pickled or machined.
Application
Components in offshore, waste water, sea water desalination and chemical plants with aggressive chloride-containing media e.g. heat exchangers, separator parts, compressor and pump components, turbine blades.
Technical Info
Chemical Composition (average %)
| C | Si | Mn | Cr | Mo | Ni | W | Cu | N | PREN |
|---|---|---|---|---|---|---|---|---|---|
| 0.020 | 0.25 | 0.55 | 25.20 | 3.70 | 7.00 | 0.65 | 0.60 | 0.22 | Min. 40 |
Standards
UNS S32760
Hot Forming
Forging
1280 to 1000°C (2336-1832°F)
Air cooling
Heat Treatment
Quenching:
1100°C (2012°F)
Water , air (thickness below 2mm)
Structure as quenched:
1100°C (2012°F)
Water , air (thickness below 2mm)
Structure as quenched:
Ferrite + Austenite
Welding
Weldability of super duplex 32760 is good. The welding procedures are similar to those applied for conventional duplex grades. Welding consumables for different welding methods are available.
Machining
The machine ability of super duplex 32760 is superior to comparable super duplex grades due to its optimised inclusion characteristic. Further details are available on request.
Mechanical Properties
Condition: quenched
| Product | Dimension Size mm |
0.2% proof stress N/mm2 min. |
Tensile strength N/mm2 min. |
Elongation A5 % min. L Q T |
Impact strength (ISO-V) J min. L Q T |
|---|---|---|---|---|---|
| St, Sch | ≤250 | 550 | 750 | 25 – – – – | 70 – – – – |
| Bl | ≤ 75 | – – 251) – – | – – 55 – – |
St = Bar , Sch = Forging,
Bl = Sheet or plate
L = Longitudinal, Q = Transverse, T = Tangential
1) < 3mm = A80mm specimen
The values for other products and dimensions shall be established by agreement.
Hight Temperature Properties
Condition: quenched
| 0.2% yield strength N/mm² min. |
Temperature | |||||
|---|---|---|---|---|---|---|
| 50°C (122°F) | 100°C (212°F) | 150°C (302°F) | 200°C (392°F) | 250°C (482°F) | 300°C (572°F) | |
| 510 | 480 | 445 | 405 | 400 | 395 | |
Physical Properties
Thermal conductivity at …………….. 20°C (68°F) …………..15.0 …………W/(m.K)
Specific heat at ………………………..20°C (68°F) …………..450 ………….J/(kg.K)
Electrical resistivity at ………………. 20°C (68°F) …………..0.80 …..Ohm.mm2/m
Modulus of elasticity at …………….. 20°C (68°F) …………..250 x 103 …N/mm2
Magnetic properties …………………………………………………magnetic
| 20°C und …°C, 10-6 m/(m.K) bei Thermal expansion between 20°C (68°F) and …°C (°), 10-6 m/(m.K) at |
Temperature | 10-6 m/(m.K) | |
|---|---|---|---|
| ˚C | ˚F | ||
| 100°C | 212°F | 13.3 | |
| 200°C | 392°F | 13.6 | |
| 300°C | 572°F | 14.0 | |
| 400°C | 752°F | 170 | |
| Modulus of elasticity, 103 N/mm2 at | Temperature | 103 N/mm2 | |
|---|---|---|---|
| ˚C | ˚F | ||
| 20°C | 66°F | 205 | |
| 100°C | 212°F | 200 | |
| 200°C | 392°F | 195 | |
| 300°C | 572°F | 180 | |
| 400°C | 752°F | 170 | |
As regards applications and processing steps that are not expressly mentioned in this product description/data sheet, the customer shall in each individual case be required to consult us.