This part of GB/T 19799 specifies the size, material and fabrication requirements of steel test blocks used to calibrate ultrasonic testing equipment in manual testing.
GB/T 19799.1-2015 Referenced Document
EN 10025-2 Hot rolled products of structural steels - Part 2: Technical delivery conditions for non-alloy structural steels
EN 1330-4 Non-destructive testing - Terminology - Part 4: Terms used in ultrasonic testing
GB/T 12604.1-2005 Non-destructive testing-Terminology-Terms used in ultrasonic testing
GB/T 19799.1-2015 history
2015GB/T 19799.1-2015 Non-destructive testing.Ultrasonic testing.Specification for calibration block No. 1