A/SP Lab Procedures: Measuring the Monotonic Properties of Sheet Steel after Pre-Strain and Baking (2023)

The purpose of this procedure is to provide a methodology to assess the mechanical properties of sheet steel subjected to controlled pre-strain and baking. The Bake Hardening Index (BHI) is a two-step procedure using a standard longitudinal (rolling direction) tensile-test specimen which is first pre-strained in tension to 2% followed by low temperature baking.