Abstract
Many kinds of steel are widely used in steel bridge structures. This report summarized the welding procedure tests carried out in 2003-2010. In these welding tests, four kinds of steel were employed to fabricate welded joint specimens, which were SM490Y, SMA490W, SM570Q and SMA570W. In this report, the results of tensile strength and Charpy absorbed energy were shown. Tensile strength exceeded to the nominal base metal strength for all tensile coupon specimens. Charpy absorbed energy of HAZ (heat affect zone) also exceeded to 200J on an average in many type of steel. However, there were a few cases that an average of Charpy absorbed energy of Depo (weld metal) is beyond 100J, regardless of welding wire and welding method. It has been shown that the mechanical properties, such as tensile strength and Charpy absorbed energy, of welding materials does not exceed to that of steel material.
