L51821 Evaluation of Weldable 13 Percent Chromium Steels for Linepipe Applications

The overall aim of the project was to demonstrate the ability to produce welds suitable for linepipe applications in nominally weldable 13%Cr stainless steels covering the range of grades being marketed as low cost alternatives to 22%Cr duplex stainless steel. This included the following: (i) Development of welding guidelines giving sound joints in weldable 13%Cr steels, with minimum preheat requirement. (ii) Quantification of the mechanical, corrosion and environmental cracking properties of weldments in weldable 13%Cr steels. (iii) Quantification of the effect of brief PWHT cycles on weldment properties in weldable 13%Cr steels.