For CSA Z662, which tests are used in destructive testing?

For CSA Z662, which tests are used in destructive testing?

• A. Bends, tensiles, and nick breaks
• B. Only tensile tests
• C. Only visual inspection
• D. Hardness tests only

Answer: (A)

Testing welded joints per CSA Z662 relies on three destructive checks because each reveals a different aspect of weld quality. Bend tests push the weld to its ductile limits and show whether the weld can withstand bending without cracking, simulating service stresses. Tensile tests pull the joint apart to measure strength and ductility, giving material properties like yield and ultimate tensile strength and the elongation at break. The nick-break test concentrates stress at the weld by introducing a notch and then breaks the specimen to inspect the fracture surface for defects such as lack of fusion, cracks, or porosity along the weld seam. Visual inspection and hardness tests don’t provide the same direct assessment of weld integrity, ductility, or failure modes, so they don’t substitute for these destructive tests.

Testing welded joints per CSA Z662 relies on three destructive checks because each reveals a different aspect of weld quality. Bend tests push the weld to its ductile limits and show whether the weld can withstand bending without cracking, simulating service stresses. Tensile tests pull the joint apart to measure strength and ductility, giving material properties like yield and ultimate tensile strength and the elongation at break. The nick-break test concentrates stress at the weld by introducing a notch and then breaks the specimen to inspect the fracture surface for defects such as lack of fusion, cracks, or porosity along the weld seam. Visual inspection and hardness tests don’t provide the same direct assessment of weld integrity, ductility, or failure modes, so they don’t substitute for these destructive tests.