Inventor won't do what you want out-of-the-box. You have to do some custom programming in iLogic.
See http://help.autodesk.com/view/INVNTOR/2014/ENU/?guid=GUID-BEBDED71-ED75-4329-ADBA-2E5DDCCF8DE8 for some iLogic background
My reseller tech support gave me this code a few years ago. I run it as an external rule, so I only add it to specific files. I could have added it to my template files, but I did not want to bog down 1000s of components in a large assembly with something I only need in a few components.
Add this code as an iLogic rule to create a new custom iProperty that stores the material density in lb/ft^3. Set the rule to run on any geometry change.
Display the new iproperty on your drawing as needed.
Code Starts:
Density_in_lbs_ft_cubed = Round((ThisDoc.Document.ComponentDefinition.Material.Density*62.427960841), 0)
iProperties.Value("Custom", "DENSITY_IN_LBS_PER_FT_CUBED") = Density_in_lbs_ft_cubed & " lbs/ft^3 "
Code Ends
Steve Walton
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Inventor 2025
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