Objective
During the last decade or so considerable financial investment in steel processing and production has been aimed at reducing the risk of hydrogen cracking in the heat affected zone (HAZ) of weld and hence the need and extent of preheating to avoid the problem. This aim has largely been achieved through the lowering of steel carbon and carbon equivalent levels so that the risk of HAZ hydrogen cracking and the need for preheating have both been reduced or eliminated. Moreover these reductions in steel carbon and carbon equivalent levels have been obtained without loss of plate strength. Preheat, however, is still required in order to avoid hydrogen cracking in the weld. The preheat proposal is designed to study the problem of weld metal hydrogen cracking so that levels of preheating can be predicted as accurately as for the avoidance of HAZ cracking. The advent of such a prediction scheme will reduce fabrication costs by avoiding unnecessary preheat on the one hand and by avoiding the costs incurred when cracking occurs on the other hand.
Topic(s)
Call for proposal
Data not availableFunding Scheme
CSC - Cost-sharing contractsCoordinator
CB1 6AL CAMBRIDGE
United Kingdom