New tools for steels weldability model based on the risk assessment

Abstract

In this paper a new weldability model is presented, which can be applied to different steel grades based on a risk analysis, parent and filler material properties, welding process, and welding technology. The previous weldability models based on the carbon equivalent formula or on other indirect methods available in the literature have limited applications. This is because it considers only the steel chemical composition, ignoring other process factors over the weldability. The weldability should consider all material and process factors of influence, even for the very same steel grade, which can be welded in different conditions, thus obtaining different weldability results.