Stainless Steels

‘Duplex’ stainless steels are a family of stainless steels that contain a mixed microstructure of austenite and ferrite phases. They offer a combination of good corrosion resistance and high strength, making them suitable for a wide range of applications. Within the family of ‘duplex’ stainless steels, there are numerous specific grades using different compositions to […]

Nitronic is a trademark belonging to AK Steel Inc and covers a family of more highly alloyed austenitic stainless steels.

Austenitic stainless steels retain their impact strength at very low temperatures.

Duplex stainless steels are based around a composition of 22% chromium, whereas super duplex stainless steels are based around 25%.

2205 duplex is used in applications where Alloy 316L is not sufficient, but the cost differential to super duplex grades is too great.

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.

SAF2205 is a tradename of Sandvik Materials Technology, for their 22Cr duplex stainless steel (S32205, DIN 1.4462, ASTM A182 F60). SAF is an acronym of Sandvik Austenitic Ferritic, whilst 2205 is shorthand for the Unified Numbering System (UNS) designation S32205. The History of Duplex Stainless Steels Duplex stainless steels were developed in the 1930’s, for […]

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 […]