LTCC Testing

I am looking at some mechanical testing of a pipeline welding procedure. Part of the qualification programme involves fracture mechanics testing such as CTOD-R or J-R (SENT) tests. I am familiar with these and the information that they provide.

However there is also reference made to a test with the acronym LTCC, with samples taken from the weld metal and HAZ. I am not familiar with this test and would appreciate any guidance anyone can give. Even what LTCC stands for will help!