ASTM E643 − 09 Ball Punch Deformation of Metallic Sheet Material

This test method ASTM E643 − 09 explains how to perform a ball punch deformation test on metallic sheet materials. It's designed for use in shaping applications. The test is applicable to a certain group of specimens with thicknesses ranging from 0.008 to 0.080 in. The figures given in inch-pound units are to be taken as the industry standard

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Scope:

The deformation of a ball punch is a regularly used test to assess and evaluate the formability of metallic sheet materials. The most common mode of deformation is biaxial stretching. Stretching is the primary method of formation in these tests.

Procedure

As a lubricant, commercially available petroleum jelly is used only. The specific surface is not altered, which is representative of the material as a whole, mechanically or chemically. Only the punch is lubricated and a small layer of lubrication is applied to it. Other lubrication and specimen preparation systems are insufficient. The specimens and lubrication are used in accordance with the terms agreed upon by the supplier and the user. The penetrator’s speed should be between 0.2 and 1.0 inches per minute The procedure for determining the endpoint with the results of the tests is determined. At the start of the test, the penetrator displacement indication is set to zero. When the penetrator makes contact with the specimen under test conditions, the test begins.

Specimen size

Specimen blanks should be either circular or rectangular with a diameter or width of 3.5 in or 90 mm.

Result

The test result is a ball punch (penetrator) movement to decrease in-load or necking or fracture.