ISO 10275:2007 - Tensile Strain Hardening Exponent
ISO 10275:2007 specifies a method for determining the tensile strain hardening exponent, commonly called the n-value, of flat metallic materials, typically sheet and strip.
To calculate the n-value a test is performed to ISO 6892 and using the axial extensometer a stress strain curve is produced. The n-value is calculated over the whole uniform plastic strain range. This is typically from the begining of uniform strain hardening region, after any yield point phenomena, up until just before the point at which tensile strength is calculated, Rm. These calculations can be done automatically using Bluehill (not lite) or Partner software.
An ISO 10275 test is typically performed at the same times as ISO 10113, plastic strain ratio.
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