In testing for environmental induced cracking several types of specimens can be used. For instance,
tensile specimens can be used with constant load technique or u-bends and c-rings with constant strain
can be used. Naturally the decrease of load with time during testing is of great importance. For a
constant strain type of corrosion specimen relaxation takes place and for a constant load specimen, low
temperature creep occurs. In several documents the test load level for specimens is given. The load
level in one document can be different whether constant load technique or constant strain specimens
are used.