To Reduce the Fracture Mechanic at The Welding Spiral Pipe with Stress Relief Annealing

Submerged Arc Welding (SAW) is welding process used for fabrication of pipes, for example spiral welded pipes. The technique can be operated automatically and has a high reliability in many various welding applications. Some Factor affecting the strength of weld metals are heat input, current, and chemical composition of filler, flux, and base metal and also treatment after welded. The present investigation aims to study fracture mechanic after treatment with Stress Relief Annealing on submerged arc spiral welded steel pipes. Material used in this experiment was API 5L X-65 for spiral welded steel pipes. Welding was carried out using voltage of 35 volt, welding speed of 13,67 mm/s whereas post weld heat treatment temperature namely standard, 500°C, 600°C, 700°C to reduce fracture mechanic. Result show that, the annealing temperature while to height reducing fracture mechanic start with annealing temperature at 500C, and decrease in 600°C, 700°C and without annealing.