2009 Volume 16 Issue 61 Pages 61_85-61_91
Many kinds of weathering steel were widely used in steel bridges. This report summarized the welding procedure tests using the weathering steel which we carried out in 2006-2007. In these welding tests, four kinds of weathering steel were employed to fabricate welded joint specimens, which were SMA570WQ, SMA570W-TMC and SMA570W-MODIFY(1%&3% Ni-advanced steel). In this report, the results of tensile strength and charpy absorbed energy were shown. Tensile strength exceeded 600N/mm2 in all tensile coupon specimens. Charpy absorbed energy of HAZ(heat affect zone) also exceeded 180J on an average in each type of steel. However, there were a few specimens beyond 100J in charpy absorbed energy of Depo(weld metal), regardless of welding wire and welding method. It was shown that the performance of welding materials did not reach the performance of steel.