ISO 10275: Tensile strain hardening exponent (n-value) for metal sheet and strip

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ISO 10275 defines how to determine the tensile strain-hardening exponent, the n-value, for flat metallic products from tensile stress-strain data. To match a setup to this test, talk with our team.

What ISO 10275 Measures

The n-value quantifies how a flat metal work-hardens through the uniform plastic range, a key indicator of formability for stamping and deep drawing. It is extracted by fitting the plastic region of the tensile curve.

How the Value Is Obtained

A tensile test is run on a flat specimen, and the uniform plastic portion of the true stress-strain data is fitted to a power law to obtain n. Accurate strain measurement across the fitting range is required.

Preparing Specimens

Flat specimens with accurate width and clean edges keep the fit reliable. To configure a system for n-value testing, request a quote.

Reading the Designation

Cited as ISO 10275:YYYY. Confirm the edition and the strain range for the fit.

Related Standards

ASTM E646 is the ASTM n-value method, and ISO 6892-1 is the underlying room-temperature tensile method.

Request a Quote

Setting up n-value testing on flat products? Request a quote and our team will help you build a system matched to your sheet gauge and strain measurement.

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Configure your ISO 10275 setup with TensileMill CNC

From specimen preparation to the test itself, TensileMill CNC supports the full ISO 10275 testing chain. Our range includes universal testing machines, wedge or pneumatic grips, and flat and round specimen-preparation systems. Tell us your materials, specimen forms, and required test sections, and our team will match the right configuration.