1.1 ,This practice covers procedures for making and using U-bend specimens for the evaluation of stress-corrosion cracking in metals. The U-bend specimen is generally a rectangular strip which is bent 180°, around a predetermined radius and maintained in this constant strain condition during the stress-corrosion test. Bends slightly less than or greater than 180°, are sometimes used. Typical U-bend configurations showing several different methods of maintaining the applied stress are shown in Fig. 1.