Research and Development > Technical Report > No.10 Special Issue on High Strength Steel Sheets > High-Performance, High-Strength Steel Sheets for Exposed Auto Body Panels

No.10 Special Issue on High Strength Steel Sheets

High-Performance, High-Strength Steel Sheets for Exposed Auto Body Panels

FUJITA Takeshi     URABE Toshiaki     SAKURAI Michitaka

Abstract

JFE Steel has developed two types of high performance high-strength steel sheets for automobile body exposed panels. The SFG (super fine grain) HITEN, “SFGHITEN^®,” which is strengthened by fine grains, gives excellent press-formability with low yield strength and a large r-value. It is observed that the formation of PFZs (precipitate free zones) results in a mechanism in which yielding begins at low stress at an initial deformation stage. The UNI (uniform unique universal) HITEN, “UNI HITEN^®” gives excellent press-formability and superior dent resistance which are obtained by increasing yield strength after paint baking.

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