4. Steel designation rules. European standard NF EN 10027

European standard EN 10027 on the steel designation system has come into force, replacing the corresponding national standards.

In France, the NF A 02-005 standard is now obsolete and has been replaced since November 20, 1992 by NF EN 10027.

This standard consists of two parts:

• NF EN 10027-1 : Symbolic designation ;

• NF EN 10027-2 : Numerical designation.

It is supplemented by a CEN report CR 10260 (information circular ECISS/IC 10, AFNOR classification index: 02-005-3) which deals with additional symbols for the symbolic designation of steels.

These additional symbols are those used in addition to the main symbols defined in accordance with EN 10027-1 when the latter are not sufficient for complete...