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ASM Handbook

Properties and Selection: Irons, Steels, and High-Performance Alloys

By
ASM Handbook Committee
ASM Handbook Committee
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ASM International
Volume
1
ISBN electronic:
978-1-62708-161-0
Publication date:
1990
Book Chapter

Dual-Phase Steels

By
G.R. Speich
G.R. Speich
Department of Metallurgical Engineering, Illinois Institute of Technology
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Published:
1990
Page range:
424 - 429

Abstract

Dual-phase steels are a new class of high-strength low alloy (HSLA) steels characterized by a microstructure consisting of about 20% hard martensite particles dispersed in a soft ductile ferrite matrix. In addition to high tensile strength, in the range of 550 MPa (80 ksi), dual-phase steels exhibit continuous yielding behavior, a low 0.2% offset yield strength, and a higher total elongation than other HSLA steels of similar strength. The article discusses some of the more pertinent aspects of dual-phase steels, such as heat treatment, microstructure, mechanical properties, chemical composition, and manufacturability. In general, these steels have a carbon content of less than 0.1%, which ensures that they can be spot welded. However, newer high-carbon dual-phase steels in development are generating interest due to their unique combination of total elongation and tensile strength.

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G.R. Speich, 1990. "Dual-Phase Steels", Properties and Selection: Irons, Steels, and High-Performance Alloys, ASM Handbook Committee

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