Examination of defective bar stock and a cracked coil spring received from the welding and ultrasonic testing school (TM-FM-018)

The spring, made from 41 mm dia. round bar and coiled to an overall diameter of 152 mm, had been manufactured at B.R.E.L., Swindon. It had been sent from there to the Welding and Ultrasonics Testing School, Derby, with a request that the) carry out magnetic particle inspection. Swindon had...