Development of High Performance Steels for Bridge Construction.
Abstract
High strength steels that are used in bridge construction (ASTM A709) have yield strengths in the 50 to 100 ksi range and allow for carbon levels to reach as high as 0.23 wt.%. For good weldability, the carbon content in HSLA steels used by the Navy is usually restricted to a maximum of 0.10 wt.%. The Navy is working with industry to develop new high performance steels for bridges with improved weldability and toughness at the 480 MPa and 690 MPa yield strength levels. The experimental steels developed by the Navy had a maximum allowable carbon content of 0.10 wt.% and low alloying levels for good weldability and high low-temperature toughness. The chemical compositions were designed to meet the weathering requirements of ASTM GlOl. Processing techniques such as recrystallization controlled rolling, controlled rolling, accelerated cooling and direct quenching were employed to achieve good mechanical properties and weldability. (AN)
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1995
- Accession Number
- ADA299291
Entities
People
- Eric M. Focht
- Thomas W. Montemarano
Organizations
- Naval Surface Warfare Center Carderock Division