Contact Langley Alloys
+44 (0) 1782 610250
langleyalloys
sales@langleyalloys.com
or complete Enquiry Form
Super Duplex
Ferralium 255-SD50, UNS S32750 & UNS S32760
In the 1960’s Langley Alloys developed the first commercially available 25% Chromium Duplex alloy, Ferralium 255, and coined the phrase Super Duplex. It pioneered the use of a deliberate nitrogen addition in order to improve ductility and corrosion resistance.
Super Duplex alloys are characterised by higher Chromium content than standard duplex stainless, typically around 25% and a PREN > 40 (PREN = Cr% + 3.3Mo% + 16N%) and offer improved corrosion resistance and better mechanical properties.
Langley Alloys offer all 3 grades of Super Duplex (Ferralium 255-SD50, UNS S32750 & UNS S32760) from stock in all forms.
Super Duplex Super Duplex
FERRALIUM 255-SD50 Super Duplex
Alloy S32760 Super Duplex
Alloy 2507
| Alloy | Common Name | Related Specifications | Tensile Strength | Proof Stress | Elongation | ||
|---|---|---|---|---|---|---|---|
| European | United States | ||||||
| ASTM A276/A479 | ASTM A182(ASME) | ||||||
| Super Duplex FERRALIUM 255-SD50 |
Alloy 255 High Strength |
1.4507 | UNS S32550 | F61 | 790[114.5] | 600 [87] | 25 |
| Super Duplex Alloy S32760 |
Zeron 100 | 1.4501 | UNS S32760 | F55 | 750 [109] | 550 [79.8] | 25 |
| Super Duplex Alloy 2507 |
Alloy 2507 | 1.4410 | UNS S32750 | F53 | 800 [116] | 550 [79.8] | 15 |
FERRALIUM® is a registered Trade Mark of Langley Alloys Ltd.