This draft standart sets out rules for designating steels by means of symbolic letters and numbers to express application and principal chatactersitics, e. g. mechanical, physical, chemical so as to provide an abbreviated, identification of steels.
DIN EN 10027-1:2005 Referenced Document
EN 10020:2000 Definition and classification of grades of steel
EN 10027-2 Designation systems for steels - Part 2: Numerical system*, 2015-04-01 Update