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SUPER DUPLEX - S32760 - 1.4501 - X2CrNiMoCuWN25.7.4 - F55 - BOHLER A911SA 
- URANUS 76N
Similar to: UNS 32750- UNS S32550 - S32520 - SAF 2507 - FERRALIUM 255-SD50
Registered trademark: ZERON 100
PREN = minimum 40
CERTIFICATION: ASTM – EN – NORSOK – NACE - WN
TEST ON REQUEST: X-RAY, DP, PMI, ULTRASONIC, CORROSION TEST (G48 A/B or others)
Stainless steel, acier inoxydable, rostfreier Stahl, Aco Inoxidável, Acero Inoxidables, Roestvrij staal, paslanmaz çelik, Нержавеющих сталей, ανοξείδωτο χάλυβα, rostfritt stål, nerez, stali nierdzewnej
We can offer these materials in commercial dimensions or cut to size required (cutting by shearing, plasma, laser and waterjet with working stroke 3000x6750 max thk. 200 mm and 5 axis cut).
We also supply welded and machining construction according to drawing and welded tubes in all dimensions.
Besides, we can provide non-commercial sizes and dimensions from steelwork according to customers' specifications and to special delivery and price conditions.
Technical card
Properties
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.
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
| EN/DIN | UNS |
| 1.4501 X2CrNiMoCuWN25-7-4 |
S32760 |
Hot forming
Forging:
1280 to 1000°C (2336 to 1832°F)
Air cooling
Heat treatment
Quenching:
1100°C (2012°F)
Water, air (thickness below 2 mm)
Structure as quenched:
Ferrite + Austenite
Welding
Weldability of such material is good. The welding procedures are similar to those applied for conventional Duplex grades. Welding consumables for different welding methods are available.
Filler metals
BÖHLER-THYSSEN
Type THERMANIT 25/09
Mechanical properties at room temperature
Condition: quenched
| Product | Size | 0.2% proof stress N/mm² min. |
Tensile strenght N/mm² |
Elongation A5 % min. | Impact strength (ISO-V) J min. |
||||
| mm | L | Q | T | L | Q | T | |||
| St.Sch | ≤250 | 550 | 750 | 25 | — | — | 70 | — | — |
| BI | ≤20 | 550 | 750 | — | 25¹ | — | — | 55 | — |
| St = Bar Sch = Forging, BI = Sheet or plate L = Longitudinal, Q = Transverse, T = Tangential |
¹ For sheet or plate < 3 mm = A80 mm specimen The values for other products and dimensions shall be established by agreement. |
High - temperature properties
Condition: quenched
| 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) |
| 0.2% proof stress N/mm² min. | 510 | 480 | 445 | 405 | 400 | 395 |
Physical properties
| Density at 20 °C (68°F) | 7,80 kg/dm³ |
| Thermal conductivity at 20 °C (68°F) | 15,0 W/(m.K) |
| Specific heat at 20 °C (68°F) | 450 J/(kg.K) |
| Electric resistivity at 20 °C (68°F) | 0,80 Ohm. mm²/m |
| Modulus of elasticity at 20 °C (68°F) | 205 x 10³ N/mm² |
| Magnetic properties | magnetic |
| Thermal expansion between 20 °C (68°F) and ...°C (°F), 10E-6 m/(m.K) at | Temperature °C (°F) | 10E-6 m/(m.K) |
| 100° (212°F) | 13,3 | |
| 200°(392°F) | 13,6 | |
| 300°(572°F) | 14,0 | |
| 400°(752°F) | 14,2 |
| Modulus of elasticity, 10³ N/mm² at | Temperature °C (°F) | 10³ N/mm² |
| 20° (68°F) | 205 | |
| 100° (212°F) | 200 | |
| 200°(392°F) | 195 | |
| 300°(572°F) | 180 | |
| 400°(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.