What is a Longitudinal Bend Test in Welding?

The Longitudinal Bend Test is a test in which a specimen is bent to a specified bend radius. This test is usually performed on welds in order to determine their soundness or lack thereof. A longitudinal bend test can be used to find defects such as:

cracks,
undercuts,
slag inclusion,
or porosity in the weld.

This test is also known as a “bend test” or a “destructive test”.

When performing a longitudinal bend test, the specimen is first placed in a jig or fixture. The jig or fixture will hold the specimen in place while it is being bent. The specimen is then bent at a specified angle and radius. After the specimen has been bent, it is examined for defects. The most common way to examine the specimen is with a magnifying glass or microscope.

The Longitudinal Bend Test is an important test for welding quality assurance. This test can help ensure that the welds are of good quality and free from defects. This test can also be used to find problems with the welding process itself.

What are the types of bending tests?

There are three main types of bending tests:

the 3-point bend test,
the 4-point bend test,
and the reverse bend test.

What is a transverse bend test?

A transverse bend test is a test in which a specimen is bent along its transverse axis. This type of test is used to determine the ductility of the specimen. The transverse bend test is also known as a “tension-compression” or “TC” bend test.

What is a side bend test in welding?

A side bend test is a test in which a specimen is bent along its side axis. This type of test is used to determine the soundness of the weld. The side bend test is also known as a “shear” or “S” bend test.

Why is the bend test important?

The bend test is important because it can help ensure that the welds are of good quality and free from defects. This test can also be used to find problems with the welding process itself.