Charpy V-notch (CVN) impact testing of the welded steel product. A required toughness level is commonly expressed for a particular test temperature (which may be different from the lowest anticipated service temperature) at which a minimum CVN impact energy value (KVmin), shall be achieved. The approximate relationship between the CVN energy-temperature curve and the fracture behavior of a welded steel component.
Here are the samples of Typical impact test specimens will be machined and tested according to AWS D1.1, ASME B31.3, ASME VIII, and other construction codes.
1 Centreline of the weld
2 Fusion line
3 In HAZ, 1mm from the fusion line
4 In HAZ, 3mm from the fusion line
5 In HAZ, 5mm from the fusion line
In case of the base metal thickness is over 20mm, or 50mm. Addition test will be took placed at the Root area as below image: