ASTM E190-14 pdf free. Standard Test Method for Guided Bend Test for Ductility of Welds.
ASTM E190 covers a guided bend test for the determination of soundness and ductility of welds in ferrous and nonferrous products. Flaws, not shown by X rays, may appear in the surface of a specimen when it is subjected to progressive localized overstressing. This guided bend test has been developed primarily for plates and is not intended to be substituted for other methods of bend testing.
4. Summary of Test Method
4.1 The specimen is bent in a U-shaped die by means of a centrally applied force to the weldment in a flat specimen supported at two positions equidistant from the line of force application. The specimen is forced into the die by a plunger having the shape necessary to produce the desired contour. The convex surface of the bent specimen is examined for cracks or other open flaws.
5. Significance and Us
5. I The guided bend test as described in this test method is used to evaluate the quality of welds as a function of ductility as evidenced by their ability to resist cracking during bending.
6. Apparatus
6.1 The guided bend test jig is shown in Fig.I.
7. Sampling
7. I Sample accord with the requirements of relevant speci fications and codes.
8. Test Specimens
8.1 The types of specimens generally used for guided bend testing are rectangular ones machined from plates and pipe The weld-face surface of the flat specimen contains the greater width of the weld material, while the opposite side is called the weld-root surface.
8.1.1 Transverse Side Bend-The weld is transverse to the longitudinal axis of the specimen, which is bent so that either one of the side surfaces becomes the convex surface of the bent specimen (Fig. 2 and Fig. 3).
8.1.2 Transverse Face Bend-The weld is transverse to the longitudinal axis of the specimen, which is bent so that the weld-face surface becomes the convex surface of the bent specimen ( Fig.4).
8.1.3 Transverse Root Bend-The weld is transverse to the longitudinal axis of the specimen, which is bent so that the weld-root surface becomes the convex surface of the bent specimen(Fig.4).