Yes, that's what I do. The problem is that sometimes works, sometimes doesn't.
And I try to understand why. Thanks.

Here it is an example where it works. I'm able to copy-paste the Material Property from Part to Assembly.
For the moment I can't replicate the situation when it doesn't work!!

I'll try to make a copy of a part where it works and one where it doesn't and attach them.

It's the standard company. I know what is an assembly. Assembly: a sheet metal part with PEM inserts. On the assembly drawing, for manufacturing, the sheet metal material must appear, in a table with General Information.

Hi. I have an assembly with a part in it. The part has a certain Material in its Properties. I want to propagate this Material (Properties) to Assembly Properties. I copy-paste from part to assembly Properties. Sometimes it works, sometimes it doesn't.
Why this behavior?