ASTM-E643

ASTM E643 – Standard Test Method for Ball Punch Deformation of Metallic Sheet Material

ASTM E643 – This test method covers the procedure for conducting the ball punch deformation test for metallic sheet materials intended for forming applications.

The test applies to specimens with thicknesses between 0.008 and 0.080 in. (0.2 and 2.0 mm).

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Description

ASTM E643 – Standard Test Method for Ball Punch Deformation of Metallic Sheet Material

 

ASTM E643 – This test method covers the procedure for conducting the ball punch deformation test for metallic sheet materials intended for forming applications.

The test applies to specimens with thicknesses between 0.008 and 0.080 in. (0.2 and 2.0 mm).

NOTE 1: The ball punch deformation test is intended to replace the Olsen cup test by standardizing many of the test parameters that previously have been left

to the discretion of the testing laboratory.

NOTE 2: The modified Erichsen test has been standardized in Europe. The main differences between the ball punch deformation test and the Erichsen test

are the diameters of the penetrator and the dies.

The ball punch deformation test is widely used to evaluate and compare the formability of metallic sheet materials.

Biaxial stretching is the predominant mode of deformation occurring during the test and, therefore, the results are most often used to rate or compare materials

that are to be formed mainly by stretching. However, precise correlations between the cup height as determined by this test and the formability of a sheet material

under production conditions have not been established.


ASTM E643 –  Significance and Use

The ball punch deformation test is widely used to evaluate and compare the formability of metallic sheet materials.

Biaxial stretching is the predominant mode of deformation occurring during the test and, therefore, the results are most often used to rate or compare materials

that are to be formed mainly by stretching.

However, precise correlations between the cup height as determined by this test and the formability of a sheet material under production conditions have not been

established.

It is recognized that the cup heights for specimens from the same sample may vary with differences in magnitude of hold-down force, lubrication, and method of

end point determination.

The procedures described in Sections 57.1, and 7.3 will minimize these variations.


 Referenced Documents

ASTM Standards

ASTM  E177 Practice for Use of the Terms Precision and Bias in ASTM Test Methods

ASTM  E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method

 

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