No one else has this question
What is the density of the material? Sometimes materials are so close in density it really does not matter the material type for the weight. Before materials came out I had set the density of my parts to carbon steel and that worked great for my stainless parts as well. If I used something like aluminum I would have to go and change the density setting of the part to get an accurate weight.
How are you "assigning" material?
In part, assembly?
Attach the file please.
Or some screen shot.