Super Duplex Stainless Steel S32760, Alloy S32760, s23760 duplex steel specification, SUPER DUPLEX UNS S32760, F55 S32760 Stainless Steel
UNS S32760 is a highly alloyed super duplex stainless steel with a high PREN for use in harsh environments. It is made up of 25% chromium, 7% nickel, 3.6% molybdenum, copper, tungsten, and nitrogen. This is a super duplex grade that has a microstructure that is both ferritic and austenitic. In its annealed state, the alloy is made up of between 40 and 50% ferrite.
The microstructure of super duplex has the high strength of ferritic grades and the resistance to corrosion of austenitic
grades. The metal is often used as a practical way to fix chloride-induced stress cracking, which is
stainless steel's weak spot.
It is also very resistant to sulfide stress corrosion cracking
in environments with sour gas.
UNS S32760 is known for having a high impact strength. It doesn't change from ductile to brittle, but
its impact energy does decrease slightly as the temperature drops. Even when it's welded, UNS S32760's
impact strength is only a little bit lower.
It was first made to be resistant to seawater so that pumps could be used in the North Sea. After it was
successful, it became the material of choice for many things, such as oil and gas, seawater, subsea
pipework systems, heat exchangers, and more.
UNS S32760 Super Duplex Steel Specifications
| UNS Number | S32760 |
|---|---|
| Werkstoff Number | 1.4501 |
| Standards | ASTM A182, A240, A276, A314, A473, A479, A815, A790, A928. |
| Other | F55 |
UNS S32760 Super Duplex Chemical Composition
| % | Cr | Ni | Mo | Cu | W | C | N | Mn | Si | P | Fe |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Min | 24 | 6 | 3 | 0.5 | - | 0.2 | - | - | - | - | - |
| Max | 26 | 8 | 4 | 1 | 0.03 | 0.3 | 1 | 1 | 0.030 | 0.010 | Balance |
UNS S32760 Mechanical & Physical Properties
| Mechanical & Physical Properties | 20 °C | 100 °C | 150 °C | 200 °C | 250 °C |
|---|---|---|---|---|---|
| Ultimate Tensile Strength, MPa | 751.5 | 703.3 | 682.6 | 669 | 648.1 |
| 0.2% Yield Strength, MPa | 551.6 | 469 | 448.2 | 427.5 | 400 |
UNS S32760 can be used in a variety of applications including
• Desalination plants
• Seawater systems
• Heat exchangers
• Subsea pipework systems
• Flue gas desulphurisation (FGD) plants
• Centrifuges and agitators
• Valves and pumps
• Storage tanks and pressure vessels
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