Community Research and Development Information Service - CORDIS

Abstract

The aim of this research was to determine the influence of low carbon equivalents (CE) and low sulphur contents on the allowable welding and cold bending procedures to be used in practice. Contradictory literature exists on the influence of sulphur on the susceptibility to cold cracking, and the extent to which metallurgical softening in the fine grained heat affected zone (HAZ) of low CE steels influences measured strength. Laboratory steel casts were produced to determine the influence of sulphur on cold cracking susceptibility, and it was found that the critical stress level perpendicular to the plate surface decreased with increasing sulphur content. Weld thermal simulation tests were used to determine the relevance of softening for the welding procedures. Softening was found to occur for S355 and S460 steels, but in practice only HSM 460 with a CE of 0.31 suffers from a drop in tensile strength. Cold bent material was found to have poor Charpy-V notch toughness properties, and to be unable to withstand plastic deformation.

Additional information

Authors: VUIK J, Nederlands Institut voor lastechniek, Apeldoorn (NL)
Bibliographic Reference: EUR 18778 EN (1998) 94pp.
Availability: Available from OOPEC Sales agents
ISBN: ISBN 92-828-5296-2
Record Number: 199910588 / Last updated on: 1999-04-01
Category: PUBLICATION
Original language: en
Available languages: en