Application of linepipe metallurgy for non-linepipe structural applications: case studies

Linepipe steels are now produced with excellent low temperature toughness even at high strength levels. Due to lean alloy chemistry, these steels offer excellent weldability with minimal pre- or post-weld heat treatment requirements. There has been increased interest among construction, mining and machinery fabricators for non-heat treated as-rolled high strength plates for application as structural members. Linepipe steels offer significant cost benefits apart from dimensional and metallurgical advantages. Any of the linepipe steel grades can be suitably adapted for structural applications with intelligent modifications to chemistry and process design, but simply adhering to the fundamentals of linepipe process protocol. At ArcelorMittal Burns Harbor, some linepipe grades have been successfully applied as structural products satisfying both chemistry and applications’ requirements. Some case studies are presented in this paper. (AU) Copyright © 2015 Companhia Brasileira de Metalurgia e Mineração (CBMM) All rights reserved.