Welder Qualification is a process which evaluates a welder’s capability to create sound welds to an industry standard following a welding procedure, this qualification can then lead to welder Certification.
Post-weld heat treatment is applied to welded steel assemblies, primarily to reduce the likelihood of brittle fracture. The benefits of PWHT include a significant reduction of tensile residual stresses in the weld joint and, to a lesser extent, tempering of the heat-affected zone and the weld metal microstructures.