This International Standard lays down the dimensions, type of steel and directives for the use of block No. 2 for the calibration of ultrasonic equipment for the examination of welds in steel.
SIS SS-EN 27 963-1992 history
1992SIS SS-EN 27 963-1992 Welds in steel — Calibration block No. 2 for ultrasonic examination of welds (ISO 7963:1985)