This document describes bend testing procedures for evaluating the ductility of welds. It discusses different types of bend tests including guided bend tests, where a mandrel forces the specimen between supports, and free bend tests. It explains that guided bend tests are primarily used for plates. The document also outlines how to prepare bend test samples in different orientations like transverse face, root, and side bends as well as longitudinal face and root bends. Finally, it states that bend testing can show the tensile strength, ductility, and fusion/penetration of welds.

1. Standard Test Method
For
Guided Bend Test For Ductility
Of Welds

2. BEND TESTING
 Bend test samples are referred to as “Test
Coupons”
 Bend tests for ductility provide a simple
way to evaluate the quality of materials by
their ability to resist cracking or other
surface irregularities during one
continuous bend.
 The most common bend tests are
 GUIDED BEND TEST
 SEMI-GUIDED BEND TEST
 FREE BEND
 BEND AND FLATTEN

3. GUIDED BEND TEST
 A guided-bend test using a mandrel or
plunger of defined dimensions to force
the mid-length of the specimen
between two supports separated by a
defined space.
GUIDED BEND TEST HAS BEEN
DEVELOPED PRIMARILY FOR THE
PLATES AND IS NOT INTENDED TO
BE SUBSTITUTED FOR OTHER
METHODS OF BEND TESTING

4.  After bending, the convex surface of the
bend is examined for evidence of a crack or
surface irregularities.
 If the specimen fractures, the material has
failed the test. When complete fracture does
not occur, the criterion for failure is the
number and size of cracks or surface
irregularities visible to the unaided eye
occurring on the convex surface of the
specimen after bending, as specified by the
product standard.

5. Bend Testing Sample
Preparation

7.  TRANSVERSE FACE BEND TEST
 TRANSVERSE ROOT BEND TEST
 TRANSVERSE SIDE BEND TEST
 LONGITUDINAL FACE BEND TEST
 LONGITUDINAL ROOT BEND TEST
3/18/2018

8. Face Bend Testing

9. Root Bend Testing

10. Side Bend Testing

11. Longitudinal Face Bend
Testing
12BIE041-42-43-44-45 3/18/2018

12. Longitudinal Root Bend
Testing

13. RESULTS OF BEND TESTING
Bend testing - Physical condition of the weld and
the weld efficiency and also shows
 Tensile strength
 Ductility
 Fusion and penetration for the weld area.