Analysis of SA 387 Gr. 91 welded joints crack resistance under static and impact load

This paper presents the results of experimental testing crack resistance specimens taken from a welded plate made steel SA-387 Gr. 91, while taking into account different filler materials and welding procedures that were used. type steels is typically used in pressure vessels, pipelines gas installations chemical petrochemical industry, as well thermal installations. Since it operating under extreme conditions, which include elevated temperatures and/or corrosion, mechanical properties 91 will deteriorate over time, especially its joints. For this reason, very important to thoroughly analyse behaviour joints, possibility cracks initiating any three joint regions, parent material (PM), weld metal (WM) heat affected zone (HAZ). can be achieved by determining total impact energy Charpy with V-2 notches each along their components, initiation propagation energy, measuring fracture toughness.