What is the general purpose of the described destructive test for open butt joint welds?

• A. To determine if the weld remains intact after bending
• B. To grade the weld color
• C. To measure porosity
• D. To test corrosion resistance

Answer: (A)

The main idea is to check how well the weld holds up under bending stress. An open butt joint weld is joined along the seam between two pieces, and bending the welded joint simulates the kind of flexing it would experience in service. If the weld remains intact through the bend, it shows the weld has enough ductility and proper fusion to resist cracking or pulling apart under load. If cracks or separation appear, it signals defects such as poor fusion, contaminants, or improper weld parameters that would compromise the joint’s strength.

This test isn’t about cosmetic color, nor is it specifically a porosity measurement or corrosion check. Porosity and corrosion are important in other tests or inspections, but the bend test’s purpose is to reveal the weld’s structural soundness under flexural stress.