ASTM approves standard for developing steel sheets
In a quest for lighter, more crash-resistant and fuel-efficient vehicles, the automobile and steel industries are developing steel sheets that have higher alloy content, and thus more complex hardening mechanisms, than sheets currently being used. The advanced high-strength steel (AHSS) sheets are covered by a new ASTM Intl. standard, ASTM A1079, Specification for Steel Sheet, Complex Phase (CP), Dual Phase (DP), and Transformation-Induced Plasticity (TRIP), Zinc-Coated (Galvanized) or Zinc-Iron Alloy-Coated (Galvannealed) by the Hot-Dip Process.
According to ASTM, the specification brings the new class of coated sheet steels into the ASTM system while also simplifying the many company specifications so that users have a better understanding of the chemistry and mechanical properties of the available classes and grades.
The standard is being written so that automobile manufacturers will be able to adopt it when AHSSs have been fully developed.
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