Answer
It was decided by the "Metals Raw Materials" working group to use EDMS documents as material reference to define completely the special St. Steel materials. By this way CERN will have a unique reference that will be used by the designers and by the purchasing department.
If you want to know what happen after the change will be done, there are two cases which are described in the link below.
From October 2014, the St. Steel materials change the name in CATIA and SmarTeam. You can also find the list of changes in this document.
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