Special Inspection
- Positive Material
Identification(PMI) - Ferrite Content
measurement - PAUT
(Phased Array Ultrasonic Testing) - TOFD
(Time of Flight Diffraction) - Infrared and
Thermal Testing - CR
(Computed Radiography) - Hardness
Test
Hardness Test
Principle and Method
The purpose of hardness test is to know the hardness value of the material used, to estimate the hardening of the material from the hardness value, and to determine the machining or heat treatment state of the specimen from the hardness value. Hardness Test methods include indentation hardness test, scratch hardness test, and rebound hardness test.
The most common method is a Indentation Hardness Test that obtains hardening by pressing and pulling the steel ball against the test plate with a constant load, and then measuring the depth or surface area of the specimen that was pressed.
