Key Benefits
- The best choice for dissimilar metal weld tests
- Wrap-around principle minimizes "kinking"
- Laboratory precision
- Rapid mandrel changeover
- 1/32 to 1-7/8 inch bend radii
- Full, unobstructed view
- Integral hydraulic system
Why Fischer Wraparound Bend Testers are Special
- No one else in the industry offers such a wide selection of standard wraparound
mandrels. The Model BT3 is not limited to a few bending radii. It will not become obsolete
if your code/standard requirements change. It is adjustable for any
 bend
radii between 1/32 and 1-7/8 inches. Shown to the right is the 1/16 inch
diameter mandrel we developed for the Naval Surface Warfare Center. Also
shown is a 0.016 inch thick titanium specimen tested using this mandrel. For
more details click here.
- The Model BT3 Bend Tester uses a unique method for wrapping the bend specimen around the
mandrel. Specimens are forced to conform to the mandrel surface. This is especially useful
for specimens from dissimilar metal weldments or those with significantly different weld
and base metal strengths. When tested in a standard guided bend tester, primary bending
will occur in the weakest material. The effective radius in the bend can become so small
that the maximum elongation property of the material is exceeded, resulting in fracture.
- For mandrels larger than 1/2 inch, a knurled surface is used to drive the specimen being
tested. For routine bends, no special clamping or specimen preparation is required. We
call this "quick clamping".
Click here to determine the
bend radius (and mandrel) for your application.
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Model BT3 Bend Tester