ASTM E190 test method determines soundness and ductility of welds in ferrous and non-ferrous products by Guided Bend Test. The Guided Bend is used to evaluate the ductility of welds by checking their ability to resist cracking during bending in the end use conditions.
The ASTM E190 Guided Bend Test is a quality control procedure that determines the ductility of welds in ferrous and non-ferrous materials at the face and root of a welded junction. The ASTM E190 test is used to see if the weldment under test has any discontinuities, such as cracks, lack of fusion, insufficient penetration, or significant porosity. The guided bend test is a simple and cost-effective way to determine whether a groove weld is workable.
For ASTM E190, 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. Then, the convex surface of the bent specimen is examined for cracks or other open defects.
Solid rectangular test specimens machined from plates and pipes are required for the ASTM E190 Guided Bend Test.
Side-Bend Specimen for Ferrous and Non-Ferrous material : Cut the specimen into approximately equal strips between ¾ and 1 ½ inch (19 and 38 mm) wide for plates over 1 ½ inch (38 mm) thick.
Size of cracks is reported in Inch-pound and is considered as standard.
The allowable crack size is specified by the code or specification requiring the test if the test is conducted as an acceptance criterion.
The size and location of all cracks visible to the unaided eye are reported if the test is conducted for informational purposes.
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An immunological method for quantization of Hevea Natural Rubber (HNRL) proteins using rabbit anti-HNRL serum. Rabbits immunized with HNRL proteins react to the majority of the proteins present, and their sera have the capability to detect most if not all the proteins in HNRL.
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