CS-4 test block - NB/T47013-2015 Standard test block for non-destructive testing of pressure equipment
The CS-4 test block is designed according to NB47013 standard for ultrasonic testing of carbon steel and low alloy steel forgings used in pressure equipment. It is suitable for measuring the sound energy loss caused by different curvature when the curvature radius of the workpiece detection surface is less than or equal to 250mm.