Which weld test is classified as a destructive test?

Which weld test is classified as a destructive test?

• A. Guided bend
• B. Tensile
• C. Visual inspection
• D. Ultrasonic

Answer: (A)

The guided bend test is classified as a destructive test because it involves applying a bending force to a welded sample until it fails or fractures. This process is intended to evaluate the ductility and soundness of the weld, as well as to detect any defects that might lead to failure under service conditions. Since the weld joint cannot be reused after the test and is permanently altered or destroyed, this type of testing is deemed destructive. In contrast, the tensile test, while also a destructive test, is primarily focused on assessing the material’s strength by measuring how much it can be stretched before it breaks. Visual inspection and ultrasonic testing, however, are non-destructive methods aimed at detecting surface and internal defects without causing any damage to the test piece. These distinctions make it clear why the guided bend test is specifically categorized as a destructive test.

The guided bend test is classified as a destructive test because it involves applying a bending force to a welded sample until it fails or fractures. This process is intended to evaluate the ductility and soundness of the weld, as well as to detect any defects that might lead to failure under service conditions. Since the weld joint cannot be reused after the test and is permanently altered or destroyed, this type of testing is deemed destructive.

In contrast, the tensile test, while also a destructive test, is primarily focused on assessing the material’s strength by measuring how much it can be stretched before it breaks. Visual inspection and ultrasonic testing, however, are non-destructive methods aimed at detecting surface and internal defects without causing any damage to the test piece. These distinctions make it clear why the guided bend test is specifically categorized as a destructive test.