One of the major priorities of the research and development department of the Salzgitter Group is placed on the product and process optimisation of both approved conventional steel grades for line pipe application and novel high strength alloying concepts. With respect to reduced wall-thicknesses and higher operating pressures for gas transportation pipelines, the requirements for hot wide strip material are steadily increasing. Material strength can be increased either by grain refinement of the ferritic-pearlitic phase in combination with precipitation hardening or by replacing the ferrite-pearlite by an intermediate microstructure, so-called acicular ferrite. A low carbon content supports the formation of the microstructure desired and results in an improvement of the carbon equivalent. This acicular ferrite does not only raise the material strength but also improve low temperature toughness, weldability and workability. New processing routes based on the demands of novel alloying concepts have been developed in order to achieve the intermediate microstructure. In the following paper, two different alloying and processing strategies and the resulting mechanical properties and microstructures are described and illustrated.
Skip Nav Destination
2008 7th International Pipeline Conference
September 29–October 3, 2008
Calgary, Alberta, Canada
Conference Sponsors:
- International Petroleum Technology Institute and the Pipeline Division
ISBN:
978-0-7918-4859-3
PROCEEDINGS PAPER
A Novel Alloying Concept for Thermo-Mechanical Hot-Rolled Strip for Large Diameter HTS (Helical Two Step) Line Pipe
Sandrine Bremer,
Sandrine Bremer
Salzgitter Mannesmann Forschung GmbH, Salzgitter, Germany
Search for other works by this author on:
Volker Flaxa,
Volker Flaxa
Salzgitter Mannesmann Forschung GmbH, Salzgitter, Germany
Search for other works by this author on:
Franz M. Knoop
Franz M. Knoop
Salzgitter Mannesmann Großrohr GmbH, Salzgitter, Germany
Search for other works by this author on:
Sandrine Bremer
Salzgitter Mannesmann Forschung GmbH, Salzgitter, Germany
Volker Flaxa
Salzgitter Mannesmann Forschung GmbH, Salzgitter, Germany
Franz M. Knoop
Salzgitter Mannesmann Großrohr GmbH, Salzgitter, Germany
Paper No:
IPC2008-64678, pp. 489-495; 7 pages
Published Online:
June 29, 2009
Citation
Bremer, S, Flaxa, V, & Knoop, FM. "A Novel Alloying Concept for Thermo-Mechanical Hot-Rolled Strip for Large Diameter HTS (Helical Two Step) Line Pipe." Proceedings of the 2008 7th International Pipeline Conference. 2008 7th International Pipeline Conference, Volume 3. Calgary, Alberta, Canada. September 29–October 3, 2008. pp. 489-495. ASME. https://doi.org/10.1115/IPC2008-64678
Download citation file:
24
Views
Related Proceedings Papers
Related Articles
The Effect of Prestrain on Ductile Fracture Toughness of Reeled Pipeline Steels
J. Pressure Vessel Technol (June,2011)
Economic Design of Oil-Pipe-Line Transportation Systems
Trans. ASME (January,1930)
Gas Coupled Ultrasonic Measurement of Pipeline Wall Thickness
J. Pressure Vessel Technol (August,2005)
Related Chapters
A Critical Evaluation of Mathematical Equations for Fatigue Crack Growth with Special Reference to Ferrite Grain Size and Monotonic Yield Strength Dependence
Fatigue Mechanisms
Microstructure Evolution and Physics-Based Modeling
Ultrasonic Welding of Lithium-Ion Batteries
Hydrogen Uptake and Embrittlement Susceptibility of Ferrite-Pearlite Pipeline Steels
International Hydrogen Conference (IHC 2016): Materials Performance in Hydrogen Environments