Categorized in three ways:
o First-generation AHSS are ferritic and include dual phase (DP), ferritic-bainitic
(FB), complex phase (CP), martensitic (MS), transformation-induced plasticity
(TRIP) and hot-formed (HF). They offer improved formability over a wide range
of tensile strengths compared to conventional high-strength steels;
o Second-generation AHSS are austenitic and include twinning-induced plasticity
(TWIP). They are extremely strong and formable, and can be used to provide
extraordinary mass reduction for difficult-to-form parts; and
o Third-generation AHSS are under development and expected to be ferritic or
multi-phased steels with enhanced strength and formability compared to first
generation AHSS.