Forming Strength

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Metal Forming Characterization and Simulation of Advanced High Strength Steels

Authors: Jody Shaw - U. S. Steel Corporation, Kenichi Watanabe - Kobe Steel LTD, and Ming Chen - United States Steel Corporation

SAE 2001-01-1139

Steel Strength and Processing Effects on Impact Deformation for a Crash Energy Management Component

Authors: Jody Shaw - United States Steel Corporation, and Kenichi Watanabe - Kobe Steel LTD

SAE 2001-01-1053

This study evaluated the performance of five different grades of steel, including conventional mild steel, conventional High Strength Steel (HSS), and several grades of advanced HSS. This study features DP590Y, an advanced HSS composed of ferrite-martensite phases, a new product jointly developed and produced by U. S. Steel and Kobe Steel. The purpose of the study was to determine the material properties, forming characteristics, springback characteristics, stamping failure, and crash energy management criteria for each grade.

The figure below shows the results of each test. The material with the best performance is represented by 1.0; each material follows according to the percentage of its result against the leading material. To view the results of each test, please click on the test name in the figure, or use the navigation bar on the left of the screen.

Advanced grades of HSS show improved formability over the conventional grades of HSS, these have limited ductility. These advanced grades of HSS expand the opportunities to design efficient complex components while providing improved in-component material strength. This also provides the opportunity to improve the components stiffness, strength, durability, and crash energy management while reducing overall weight of the vehicle.

Automotive components designed with advanced HSS grades requires a shift in design approach from that used with conventional HSS grades to gain the greatest weight reduction potential.

To review the complete study, click on the SAE publication numbers given above. You may use the search engine on the SAE web site to locate the papers by number.

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