Material, component and whole-unit evidence are separate
Material figures, component samples and results for complete machines or entire vessels sit at different levels. Each belongs to its own substrate, temperature and test method, and they do not substitute for one another.
The three levels
Material figures come from laboratory test bars or panels and belong to a specific substrate, temperature and test method. Component samples are tests after application on actual panels or members. Whole-unit or whole-vessel results are measured with the complete equipment or ship in operation.
Why they do not substitute for one another
Coating and panel form one vibrating system, and the result depends on substrate, geometry and joining conditions. A good material figure does not mean the same effect once fitted to a member, and a component sample result cannot be carried straight to the complete machine or vessel.
How to read the material
When you see a figure, first confirm which level it belongs to and which substrate, temperature and test method it corresponds to.
How to use them in selection
Make a first choice from material data, then compare samples on a representative component, and finally accept at whole-unit or site level as the project requires. Record and report the results of each level separately.