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Abstract:	Hochfeste Rohre und eckige Stahlbauhohlprofile für Krane sowie für den Maschinenbau werden eingesetzt, um bei zunehmender Auslastung den stetig wachsenden Anforderungen an die Konstruktion gerecht zu werden. In vielen Anwendungen besteht die Notwendigkeit, Konstruktionsmassen zu begrenzen. Damit werden entweder regulatorische Vorgaben, wie beispielsweise Achslastbeschränkungen bei Mobilkranen, oder andere anwendungsspezifische Erfordernisse erfüllt, wie die Steigerung der Hakenlast bei Gittermastkranen. Zudem bietet sich die Möglichkeit, Wanddicken zu reduzieren und damit den Verarbeitungsaufwand beim Schweißen zu reduzieren. Für Bemessung und Ausführung sind neben der Streckgrenze und den statischen Eigenschaften meist die Duktilität, die Kerbschlagzähigkeit sowie eine möglichst einfache Verarbeitung durch gleichmäßige Eigenschaften der eingesetzten Werkstoffe von zentralem Interesse. Dieser Beitrag bietet einen Überblick über Anforderungen, Herstellung und Eigenschaften hochfester nahtloser Rohre und Stahlbauhohlprofile. High strength seamless tubes and steel hollow sections for cranes and machine building applications - production and properties. High strength tubes and steel hollow sections for cranes and machine building applications are used with increasing utilization of the designs to cover continuously growing requirements. For many applications limiting construction weight is a necessity. Either regulatory inputs, like axle load limitation of mobile cranes, or other application-specific requirements such as load capacity of crawler cranes are covered. Additionally high strength steels allow wall thickness reductions and thereby give opportunity to reduce the effort of welding. For design and execution beside yield strength and static properties mostly ductility, impact properties and preferable easy processing through uniform properties of the used steel grade are key interests. This article will provide an overview of requirements, manufacturing and properties of high strength seamless tubes and steel hollow sections.
Source:	Stahlbau 84 (2015), No. 9
Page/s:	650-654
Language of Publication:	German

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