The Duplex World Update series promotes the sharing of knowledge and experience within the global materials community. Each collection of technical articles provides a valuable source of information for all those interested in duplex stainless steels.
Technical Articles
Contents of Duplex Update #2
CALL FOR PAPERS for Duplex World Seminar & Summit, November 2022, Rotterdam, the Netherlands
In a world of rising prices, duplex appears more attractive than ever, by James Chater, Duplex World
As inflation once again takes hold, duplex stainless steel can be seen as an attractive alternative to higher-alloyed materials in many applications.
Improved 22% chromium duplex stainless steel, by John Grocki, Sandra Le Manchet, Anne Higelin, Industeel (ArcelorMittal group)
Industeel recently developed a new controlled chemistry 2205 duplex stainless steel with enhanced weldability compared to the conventional 2205 material and improved low temperature toughness properties.
Sigma phase: a metallurgical challenge when welding duplex, by F Ahnia, Department of Mechanical Engineering, University A/Mira Bejaia, Algeria & F Khoshnaw, Senior Lecturer, School of
Engineering and Sustainable Development, De Montfort University
Examining new types of failures and metallurgical aspects, especially during manufacturing processes requiring high temperatures such as welding and heat treatment, have led researchers to realise that high strength alone is not sufficient to meet the requirements for a reliable component.
Continuously Stirred Tank Reactors (CSTR), by Stallkamp
A German fabricator has ventured into producing duplex CSTR tanks. At 20 meters in height, this demands a steady hand and attention to detail.
Positive results for 3D-printed duplex connectors, by MX3D/Takenaka
Large-scale 3D-printing company MX3D has successfully produced a structural connector in duplex, designed in collboration with engineers from Takenaka.
Duplex stainless steel quality – ASTM A923 vs ISO 17781, by Roger Francis, RF Materials & Glenn Byrne, Rolled Alloys
Two standards are available for users considering applying additional testing to duplex stainless steels: ASTM A923and ISO 17781.
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The Duplex World Update series promotes the sharing of knowledge and experience within the global materials community. Each collection of technical articles provides a valuable source of information for all those interested in duplex stainless steels.
Contents of Duplex Update #1
CALL FOR PAPERS for Duplex World Seminar & Summit, November 2022, Rotterdam, the Netherlands
The performance of duplex stainless steels in caustic soda, by Roger Francis, RF Materials
This paper shows that duplex stainless steels have good resistance to both general corrosion and stress corrosion cracking in caustic solutions over a wide range of concentrations and temperatures.
Lasers for production optimisation of rolling products, by Johann Peters, LAP GmbH
Production automation can address challenges regarding delivery times, production costs and product quality driven by high requirements from certain automotive industries.
Achieving ASTM G48 corrosion test at 40°C on super duplex, by Peter Stones, ESAB
Peter Stones provides advice to a welding company having difficulty achieving the required ASTM G48 test when welding super duplex.
Experimenting with welding super duplex without filler metal, by Loïc Amadu, Friedlander, Ortec Group
This study looks at the welding of small diameter and ‘thin’ wall thickness super duplex pipes with orbital GTAW, without filler metal, using an orbital closed head welding machine.
Continual improvement: duplex stainless steels prosper with better formability, by James Chater
Despite setbacks earlier this year, the oil & gas industry is recovering, and new forming techniques – and especially powder-based additive manufacturing methods – make duplex an increasingly attractive alternative to other grades.
Formula to convert Rockwell & Vickers hardness scales for duplex stainless steels, by Yong-Joo Kim, Webco Industries & Daniel Eyzop, Outokumpu
A recent study has successfully evaluated and documented the correlation between the two hardness scales.
