ASTM A720/A720M-02(2016)e1

4.1 This is a specialized bend test for nonoriented electrical steel not covered under the provisions of Test Methods E290.

4.2 This test is applicable to nonoriented silicon steel such as described in Specifications A677 and A683 in commercial thicknesses.

4.3 It is not intended to be applied to steels considered inherently ductile.

1.1 This test method covers determination of ductility utilizing Epstein test strips and a bending device for bending the strip over a predetermined radius. It is intended for commercial silicon-bearing steel sheet or strip of nonoriented types in the thickness range from 0.010 to 0.031 in. [0.25 to 0.79 mm], inclusive.

1.2 The values and equations stated in customary (cgs-emu and inch-pound) or SI units are to be regarded separately as standard. Within this test method, SI units are shown in brackets. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with this test method.

1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.