Advanced TMCP Steel Plates for Pipelines and Structurals

Abstract:

The developments of plates are strongly driven by demands from high-sophisticated pipeline and structural applications. Such needs reflect in plates with higher thickness, larger width, higher toughness also at lower temperatures, higher strength and/or better resistance to sour environments. The requirement profiles are, in some cases, exceptional and have become achievable, in an extreme combination of alloying and processing technologies, only as a result of comprehensive development work and plant investments. An outline of modern production facilities is given. A broad potential for innovation derives by the utilization of the key-technology TMCP (Thermo-Mechanical Controlled Process). As a central element to achieve high-class requirements, aspects and parameters of the metallurgical design are explained. The utilization is explained and illustrated with selected recent applications.

• Periodical: Materials Science Forum (Volumes 706-709)
• Pages: 2812-2817
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.706-709.2812
• Online since: January 2012
• Authors: Volker Schwinn, Juergen Bauer, Peter Fluess, Eric Amoris
• Keywords: Application, Metallurgical Design, Pipeline, Plate, Structurals, TMCP

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[17] information on http: /www. wind-energie. de Fig. 1: Overall requirement profile on plates Fig. 2: Tools and mechanisms to affect metallurgical properties (exemplarily and schematically) Fig. 3: Influence of the type of cooling after rolling on the microstructure (exemplarily) Fig. 4: Tensile strength and toughness at mid thickness position at -40°C for ACC and HACC for different finish cooling temperatures (CuNiNb-steel, thickness 50 mm) Fig. 5: BDWTT on specimens reduced to 19 mm thickness and YS (Rt0. 5) from tensile test in transverse direction for grade SAWL 485 IFD with a thickness of 41 mm Fig. 6: BDWTT on specimens reduced to 19 mm thickness and YS (Rt0. 5) from tensile test in transverse direction for grade API 5L X70 with a thickness of 39 mm Fig. 7: BDWTT- and HIC-test results on API 5L X65 plates with a thickness of 29. 6mm.

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