Meaning
Metallic material evaluation uses standardized uniaxial tensile testing to determine the plastic strain ratio of sheet and strip metals. This international standard, designated as ISO 10113, specifies the method for calculating the anisotropy coefficient from length and width strain measurements. It applies to materials with thicknesses between point one and three millimeters.
The resulting value indicates the drawability of the metal during forming operations.
Testing Method
Manual and automatic methods are defined to measure the changes in test piece dimensions under strain. The test for ISO 10113 requires pulling a dumbbell-shaped specimen past its yield point but before the onset of localized necking. Extensometers record the longitudinal and transverse deformation simultaneously.
This data provides the plastic strain ratio, which is calculated as the ratio of true width strain to true thickness strain.
Sourcing Application
Automotive and battery casing manufacturers use this standard to qualify raw materials for deep drawing. Compliance with ISO 10113 ensures that incoming coils of steel or aluminum will deform uniformly without tearing in the press. This verification step minimizes manufacturing defects during high-volume can production.
It also reduces tooling wear.
Test Limit
The standard is restricted to the uniform plastic deformation region of the test piece. If the specimen begins to neck, the measured strain values become invalid for calculating the ratio. This limitation requires careful selection of the strain interval used for the evaluation.
