IT IS IMPOSSIBLE to predict the future, but new developments in elastic-plastic fracture toughness testing are so imminent that they need to be presented here. Several changes have been incorporated into the new E 1737 standard, which is a combination of Standards E 813-89 and E 1152-87 but with the addition of a test procedure for obtaining J-integral fracture toughness data in the ductile-to-brittle transition regime.