Evaluation and Repair of Wrought Iron and - Purdue e-Pubs ...

212Appendix D. Welding Procedure for Wrought Iron Tension MembersD.1 Groove Weld with Double-V Connection Butt JointThe following describes the step-by-step procedure for a full-penetration groove weldwith a double-V butt joint to join two wrought iron plates:1- A chemical analysis was completed to determine the weldability of the wroughtiron.2- The edges of the pieces to be welded together were ground and cleaned of allsurface corrosion. A grinding wheel was used to form the double v butt jointshown in Figure D.1.3- The wrought iron pieces were preheated to about 200 o F prior to welding.4- An E6010 or E7018 SMAW 1/8” diameter welding rod was used to place aninitial pass on the land of the joint. This was done with a current of 100 to 105Amps for E6010 and 110-115 Amps for E7018 welding rods. The root weldswere placed at a rate of approximately 3 inches per minute using a DC ReversePolarity Miller Arc Welding Machine set on medium, which corresponded to 17-19 volts. A view of the joint after the initial weld pass can be seen in Figure D.2.5- After the initial root pass was placed, surface slag and impurities that rose to thetop of the weld, as seen in Figure D.3, were chipped off and cleaned with a chiselhammer and wire brush. A grinder was then used on the other side of the weld togrind back to the root pass, as shown in Figure D.4. This was done to ensure thatfull penetration was acquired in the following weld pass.