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ULSAB-AVC Confirms Continuing Effectiveness of Stamping

ULSAB-AVC Confirms Continuing Effectiveness of Stamping

Wednesday, February 6, 2002
 
The American Iron and Steel Institute (AISI) has just released the results of its design study for the ULSAB-AVC (Advanced Vehicle Concepts), a showcase for the latest high-tech steel grades for automotive applications, and it’s clear: even as the use of more complex steels grows, more than 70 percent of the body structures and closure parts make use of the stamping process. The study comprised conceptual designs for two vehicles—a two-door hatchback and a four-door mid-size sedan, both meeting the more stringent safety standards coming in 2004. A consortium of 33 global steel companies directed and funded the study, to confirm the applications and benefits of what the steel industry calls advanced high-strength steels (AHSS). These new grades gain high-performance properties in strength and formability by incorporating multi-phase microstructures of martensite, bainite and/or austenite. AHSS, which make up more than 80 percent of the AVC body structures, exhibit a superior combination of excellent formability, high strength, dent resistance and crash-energy management. Key is the ability of the alloys to workharden during forming. AHSS tailored blanks make up the AVC front suspension, a double-wishbone design. Closure panels are of 0.6- Dual Phase 350/600 AHSS. In all, tailored blanks account for 40 percent of the AVC body and closure structures; hydroformed parts, 20 percent; and tailored tubes, 6 percent. Stamping, concludes the report, is the predominant steel-forming method, used in more than 70 percent of the body structures and closure parts. More information can be gained at www.ulsab-avc.org.

 

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