The present authors have assumed that the sensitivity of steel to reheat cracking can be most appropriately evaluated by its own plastic deformability.Based on this assumption, the authors undertook a study of reheat cracking testing of steel by means of the stress relieving test, and of the method for evaluating the sensitivity of steel to reheat cracking.The results of the study obtained are summaraized as follows:(1) The reheat cracking test method using the weld thermal-restraint stress and the straincycle simulator has the advantage in that it allows the test to be made continuously during the heating and holding processes.
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