How to make the workflow seamlesly support material and grade values

In the Design transfer view there is a need is to convert the IFC model into native objects. In structural model the material and the grade are mandatory and important information. How to standardize these in a way it also supports the machine readable requirement?

Converted into a proposal: Proposal to store material grade in a pset · Issue #30 · buildingSMART/IFC4.3.x-development · GitHub