Super Duplex

Sigma phase is a chromium-rich intermetallic phase found in stainless steels, that forms when an alloy is cooled slowly.

SAF is an acronym of Sandvik Austenitic Ferritic and is a registered trademark of Sandvik Intellectual Property AB.

S32520 is the Unified Numbering System (UNS) designation for a super duplex stainless steel close to that of Ferralium 255.

(More commonly known as: Duplex 2205 / 2205 Stainless Steel / UNS S31803 or UNS S32205) SAF 2205 is the Sandvik Materials Technology tradename for their 22% chromium duplex stainless steel. It is more widely known by its Unified Numbering System (UNS) designation S32205, and is also referenced in international standards as DIN 1.4462 and […]

HVD-1 is the designation of a super duplex stainless steel developed for use in fertiliser production.

Uranus 52N+ is a former-trademark of Industeel. The product is now promoted as UR2507Cu. It designates a type of  super duplex stainless steel, closely following UNS S32550. This product is better known on the marketplace as Ferralium 255. Ferralium 255 (UNS32550, DIN 1.4507, F61) is the original SDSS, developed by Langley Alloys in the 1960’s. […]

UR2507Cu is a trademark of Industeel. It was formerly known as UR52N+ or Uranus 52N+. It designates a super duplex stainless steel, closely following UNS S32550. On the market, this material is better known as Ferralium 255. The History of Ferralium 255? Ferralium 255 (UNS32550, DIN 1.4507, F61) is the original SDSS, developed by Langley […]

S32550 is the Unified Numbering System (UNS) designation for the original super duplex stainless steel, best known as Ferralium 255.

25Cr is shorthand for a kind of super duplex stainless steel, based upon a composition of 25% chromium. How Does 25CR differ from Standard Stainless Steel? Chromium is a normal component of Stainless Steel — where it is used to increase the steel’s resistance to oxidation. An increase in the level of chromium increases this […]

S32750 and S32760 are both super duplex stainless steels (SDSS). As such, their microstructure is a combination of austenitic and ferritic grains, which imparts the most favourable properties of each. They are based upon a 25% chromium content (25Cr), but differences in their mechanical properties, physical properties and composition are small. 

SDSS is an acronym for Super Duplex Stainless Steel. A duplex stainless steel is a combination of a ferritic and an austenitic microstructure, and combines the most favourable properties of each.  There are a number of different SDSS available, as the family of alloys based upon a 25% chromium (25Cr) content has developed since the 1960’s.

Alloy 255 is a generic description of our unique Ferralium 255 super duplex stainless steel (DIN 1.4507, UNS S32550, ASTM F61).