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Face bend:When the load is applied on the root side so that the weld face will be in the tension.The main type of bend tests are given below and also shown in the sketch: Type of Test Specimen for Bend Test/ Type of Bend Testīend Test has different types to test the material in different conditions such as testing in longitudinal, transverse (for base metal or weld coupons), and face or root side bend in case of welding test coupons. Verify the material ductility when the test is performed for base metal only.Check the weld joint ductility for welding procedure qualification (PQR).Check the weld soundness for welder/ operator performance qualification.The main objectives of the bend tests are: The bend test is a qualitative destructive test as we will not get any test result values except whether the result is acceptable or not. The bend test is one of the most important tests for Welding Procedure Qualification (WPS) and welder performance qualification (WPQ). What is the Tensile test procedure, types of equipment and Lab report? Why do we perform bend tests? (For example in GMAW with Short-Circuiting as required in ASME Section IX and AWS D1.1). There is a restriction on although on some welding processes and welders can only be qualified by bend test and radiography and ultrasonic will not be acceptable. We can choose either the NDT method or mechanical testing as permitted by the code. We can do root bend & face bend tests according to the details given in ASME Section IX, Table QW-452.1(a). We normally use RT or UT for welder qualification to test the weld soundness but we can also opt for Bend testing to substitute these NDT tests as permitted in ASME Section IX. The bend test is being used in welder performance tests to substitute the NDT.
#3 point bend test flexture full
For the base metal thickness of more than 12 mm (1/2 inch), generally, side bend tests are used by using full cross-sectional thickness. Standards generally indicate a defect of 3mm or more to be rejected.įor material thickness less than 12 mm (1/2 inch), transverse root and face bend tests are carried out. This results in the revelation of any flaws easily with a premature bend test failure. The outer portion of the bend test takes the maximum expansion by plastic deformation under tensile stresses.