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Estimation of limit load capacity of structural steel with yield strength 960 MPa

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Abstract

Ultra-high-strength steels are sensitive to heat input during welding, which can lead to softening in the heat-affected zone. This softening can also reduce the limit load capacity in non-load-carrying welds. One challenge is how to address this phenomenon in the design phase. To solve this problem, a method to determine material parameters for design and failure criteria is required. In this paper, a procedure using notched specimens to determine material parameters and failure criteria is presented. The results are compared with component-scale tests. The results show that the developed method results agree with results from the component tests. This procedure is a practical method to estimate the ultimate capacity of ultra-high-strength steels.

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Acknowledgments

The support of the Ruukki Metals Oy and Finnish Metals and Engineering Competence Cluster (FIMECC) is gratefully acknowledged.

This paper was written as part of the Finnish Metals and Engineering Competence Cluster (FIMECC) Light program.

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Authors and Affiliations

  1. Ruukki Metals Oy,, Hämeenlinna, Finland

    Ilkka Valkonen

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  1. Ilkka Valkonen
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Correspondence to Ilkka Valkonen.

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Doc. IIW-2478, recommended for publication by Commission XV “Design, Analysis and Fabrication of Welded Structures”

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Valkonen, I. Estimation of limit load capacity of structural steel with yield strength 960 MPa. Weld World 58, 839–852 (2014). https://doi.org/10.1007/s40194-014-0163-6

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  • DOI: https://doi.org/10.1007/s40194-014-0163-6

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