ASTM B820-04

1.1 This test method describes the technique of bend testing copper and copper alloy strip samples to determine product formability or the ability to resist cracking when forming a bend around a specific radius. The criterion for failure is the occurrence of cracks on the outer radius of curvature (convex).

1.2 This bend test is limited to strip from 0.003 to and including 0.031 in. thick. (0.076 to and including 0.79 mm).

1.3 The size of the forming radii used in this test shall be 0.005 to 0.250 in. (0.127 to and including 6.35 mm).

1.4 UnitsThe values stated in inch-pounds are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.

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.

2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

ASTM Standards

Keywords

bend radius; bend test; copper and copper alloy strip; formability test; fracture; longitudinal bend; mandrel; transverse bend; Bend testing--metallic materials; Copper alloy; Copper spring test; Cracking--metallic materials; Formability testing; Loading tests--metals/alloys; Springs;

ICS Code

Citing ASTM Standards

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