Hitsisauma
Hitsisauma, in Finnish welding terminology, refers to a weld seam—the fused line where two metal parts are joined by welding. The seam results from processes such as shielded metal arc welding (SMAW), gas metal arc welding (GMAW/MIG), and gas tungsten arc welding (GTAW/TIG). Depending on geometry, hitsisauma can be a butt weld, fillet weld, or a long seam weld along the joint. The quality of the seam depends on edge preparation, fit-up, heat input, filler material, and welding parameters. A sound hitsisauma forms a continuous fusion zone with a detectable weld bead on the joint face; improper technique can produce porosity, lack of fusion, cracks, or excessive reinforcement.
Inspection and standards: Weld seams are evaluated through non-destructive testing and visual inspection, with radiography, ultrasonic
Applications and maintenance: Hitsisauma is found in construction, manufacturing, and shipbuilding where metal joints must withstand
Etymology: The term derives from Finnish hitsata, "to weld," and sauma, "joint" or "seam."