CTOD test for weld-metal (filler metal)

The demands for welding consumables are getting higher and higher day by day due to the industry that builds bigger and more demanding constructions. Risk is getting bigger and welding procedures gets more restrictions and better traceability is required. There are many ways to make prior tests for welding joints in order to find the weakest spots and also lots of standards that have to be followed.

The CTOD test (crack tip opening displacement) was developed to determine the resistance against "further" cracking at a certain temperature. In the past this test was done at sub zero temperatures of -10ºC but today the offshore industry oft requires -20º or even -40°Celsius