BS EN 10027-2:2015 pdf download – Designation systems for steels Part 2: Numerical system
1 Scope
1.1 This European Standard specifies a numbering system, referred to as steel numbers, for the designation of steel grades. It deals with the structure of steel numbers and the organization for their registration, allocation and dissemination. Such steel numbers are complementary to steel names set out in EN 10027-1.
This European Standard is applicable to steels specified in European Standards. This European Standard may be applied to national steels and proprietary steels.
NOTE Although the scope of the systems is limited to steel, it is structured so as to be capable of being extended to include other industrially produced materials.
1.2 Steel numbers established in accordance with this system have a fixed number of digits (see Clause 5).
They are better suited for data processing than steel names established in accordance with EN 10027-1.
1.3 For steels specified in European Standards the application for allocation of steel numbers (see A.6 to A.9) is the responsibility of the ECISS Technical Committee concerned. For national steel grades, the responsibility is that of the national competent body.
NOTE Applications from European organizations having a specified interest in the standardization of steel and steel products (e.g. ASD, EUROFER) are submitted via the ECISS Central Secretariat (see A.9).
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references,the latest edition of the referenced document (including any amendments) applies.
EN 10020, Definition and classification of grades of steel
EN 10027-1, Designation systems for steels ― Part 1: Steel names
EN 10079, Definition of steel products
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 10020 and EN 10079 apply.
4 Principles
4.1 Each steel number shall refer only to one steel grade. Conversely, each steel grade shall correspond to one steel number. Accordingly, a number allocated to a steel shall not, in principle (see 4.3), be used for any other steel grade (see A.1 and A.2).
4.2 Steel numbers shall be allocated by the European Registration Office in accordance with Annex A.
4.3 The European Registration Office (see A.9) shall revise the list of registered steels at appropriate intervals. The object of such revisions is to review, in cooperation with the bodies responsible for the application of steel numbers, those steel numbers for steels no longer in production. The revised list of registered steels is published on the internet (
Steel numbers deleted in accordance with the above procedure shall not be re-allocated to future steel grades.
NOTE Information concerning deleted steel grades can be received from the European Registration Office.BS EN 10027-2 pdf download.