What happens if the tensile strength tests are omitted during welder qualification?

When tensile strength tests are omitted during the welder qualification process, it is important to understand the role of alternative testing methods. Specifically, when tensile strength tests are not conducted, nick break testing may be mandated as a substitute to ensure that the weld integrity and strength can still be validated.

Nick break testing involves assessing the weld joint's ability to withstand stress and is a standard practice to evaluate weld quality. It can reveal information about the weld's ductility and strength, which are critical to determining a welder’s capability. This type of testing is especially pertinent when standard tensile tests cannot be performed, as it still provides a means to verify that the weld meets necessary specifications and standards outlined in the API 1104.

Thus, selecting nick break testing in lieu of tensile strength tests is a reasonable and established practice within the welding qualification process to maintain quality assurance.