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Hole Expansion Test

The hole expansion test is a test method applied in the metalworking industry and is used to determine the ductility of the edges on punched sheet metal.

Particularly in the case of high strength steels, forming technology presents new challenges due to the formation of edge cracks. Shearing reduces the forming capacity of the edge. In order to secure manufacturing processes, characteristic values ​​for edge crack sensitivity are therefore determined using the hole expansion test.

Overview of the Hole Expansion Tests

Hole expansion tests are described in various standards. Here you will find an overview of the current standards and tests.

Determination of edge crack sensitivity

For a hole expansion test to ISO 16630, a hole is widened with a conical punch and the edge crack sensitivity of the sheet metal is determined.
to Determination of edge crack sensitivity

Hole expansion test to KWI

For a hole expansion test to KWI a hole is stretched with a flat deep drawing die and the change-in-shape property of the sheet metal is determined.
to Hole expansion test to KWI

Related Products for Performing the Hole Expansion Test

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