Practical Failure Analysis

, Volume 2, Issue 6, pp 62–67 | Cite as

Influence of metallurgical factors on the performance of IS:7887 Gr. 3 billets for fastener applications

  • R. Datta
  • A. K. Bhakat
  • A. Deva
  • D. Mukerjee
Peer Reviewed Articles
  • 47 Downloads

Abstract

The quality advantages of continuous casting (concast) have enabled the production of a wide range of billets for various end applications, including IS:7887 Gr. 3 billets for the fastener industry. This paper discusses the influence of the internal quality of these concast billets on the processing of a wide range of products for the fastener industry. Internal soundness, inclusion volume fraction, and cleanliness were found to have a strong influence on the cracking susceptibility of self-tapping screws and nuts. A high incidence of hairline cracks on nut surfaces was found to be due to a combination of a high volume fraction of inclusions (0.54%) and the presence of complex manganese (Mn) (aluminate-silicate)-type inclusions.

Keywords

billets cracks self-tapping screws wire rods 

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Copyright information

© ASM International - The Materials Information Society 2002

Authors and Affiliations

  • R. Datta
    • 1
  • A. K. Bhakat
    • 1
  • A. Deva
    • 1
  • D. Mukerjee
    • 1
  1. 1.Research and Development Center for Iron and SteelSteel Authority of India LimitedRanchiIndia

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