How are AHSS steels classified and named?

The original nomenclature for advanced high-strength steels included their metallurgical type and minimum tensile strength; e.g., “DP500” for dual phase 500 MPa. For brevity, strength numbers can be “rounded up” when discussing a group of steels with similar characteristics.

How are AHSS categories and designations changing?

As steel manufacturers use increasingly sophisticated processes to develop new AHSS steels, including 3rd generation AHSS steels, the old metallurgical categories don’t always fit. For example, some new grades exhibit attributes from more than one of the traditional metallurgical categories.

Advanced High-Strength Steel (AHSS) definitions from SSAB Docol

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