Designation systems for steels - Part 1: Steel names

1.1   This European Standard specifies rules for designating steels by means of symbolic letters and numbers to express application and principal characteristics, e.g. mechanical, physical, chemical, so as to provide an abbreviated identification of steels.
NOTE   In the English language the designations covered by this European Standard are known as “steel names”; in the French language as “designation symbolique”; in the German language as “Kurznamen”.
1.2   This European Standard applies to steels specified in European Standards (EN), Technical Specifications (TS), Technical Reports (TR) and CEN member's national standards.
1.3   These rules may be applied to non-standardized steels.
1.4   A system of numerical designation of steels known as steel numbers is specified in EN 10027 2.

Bezeichnungssysteme für Stähle - Teil 1: Kurznamen

1.1   Zur kurzgefassten Identifizierung von Stählen legt dieses Dokument die Regeln für die Bezeichnung der Stähle mittels Kennbuchstaben und -zahlen fest. Die Kennbuchstaben und -zahlen sind so gewählt, dass sie Hinweise auf wesentliche Merkmale, z.B. auf das Hauptanwendungsgebiet, auf mechanische oder physikalische Eigenschaften oder die chemische Zusammensetzung geben.
ANMERKUNG     Im Englischen werden die nach diesem Dokument gebildeten Bezeichnungen als "steel names", im Französischen als "désignation symbolique" und im Deutschen als "Kurznamen" bezeichnet.
1.2   Die Regeln nach diesem Dokument gelten für Stähle, die in Europäischen Normen (EN), Technischen Spezifikationen (TS), Technischen Berichten (TR) und den nationalen Normen der CEN-Mitglieder enthalten sind.
1.3   Diese Regeln dürfen auch zur Bezeichnung nicht genormter Stähle angewendet werden.
1.4   Ein numerisches Bezeichnungssystem für Stähle, bekannt als Werkstoffnummern, ist in EN 10027-2 festgelegt.

Systèmes de désignation des aciers - Partie 1: Désignation symbolique

1.1   La présente Norme européenne fixe les règles de désignation symbolique des aciers, au moyen de symboles littéraux et numériques exprimant des caractéristiques principales et d’application, par exemple des caractéristiques mécaniques, physiques, chimiques, afin d´identifier de façon abrégée les aciers.
NOTE   Dans la langue anglaise les désignations définies par la présente Norme européenne sont appelées «steel names», «désignations symboliques» dans la langue française, «Kurznamen» dans la langue allemande.
1.2   La présente Norme européenne s’applique aux aciers spécifiés dans les Normes européennes (EN), les Spécifications  techniques (TS), les Rapports techniques (TR) et les normes nationales des membres du CEN.
1.3   Ces règles peuvent également s’appliquer aux aciers qui ne sont pas définis dans des normes.
1.4   Un système de désignation numérique des aciers connu sous le nom de numéros des aciers est spécifié dans l´EN 10027-2.

Sistemi označevanja jekel - 1. del: Oznake jekel

1.1. Ta evropski standard določa pravila za označevanje jekel s simboličnimi črkami in številkami, ki izražajo uporabo in osnovne značilnosti, npr. mehanske, fizične, kemične, za namene prepoznavanja oznak jekel z okrajšavami.
OPOMBA: V angleščini se oznake, ki jih zajema ta evropski standard, imenujejo »steel names«, v francoščini »designation symbolique«, v nemščini pa »Kurznamen«.
1.2. Ta evropski standard se uporablja za jekla, opredeljena v evropskih standardih (EN), tehničnih specifikacijah (TS), tehničnih poročilih (TR) in nacionalnih standardih članic CEN.
1.3 Ta pravila se lahko uporabljajo za nestandardizirana jekla.
1.4. Številčni sistem označevanja jekel, poznan kot številke jekel, je opredeljen v standardu EN 10027 2.

General Information

Status
Published
Public Enquiry End Date
05-Apr-2016
Publication Date
07-Nov-2016
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
02-Nov-2016
Due Date
07-Jan-2017
Completion Date
08-Nov-2016

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2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Bezeichnungssysteme für Stähle - Teil 1: KurznamenSystèmes de désignation des aciers - Partie 1: Désignation symboliqueDesignation systems for steels - Part 1: Steel names77.080.20JeklaSteels01.040.77Metalurgija (Slovarji)Metallurgy (Vocabularies)ICS:Ta slovenski standard je istoveten z:EN 10027-1:2016SIST EN 10027-1:2016en,fr,de01-december-2016SIST EN 10027-1:2016SLOVENSKI

STANDARDSIST EN 10027-1:20051DGRPHãþD
SIST EN 10027-1:2016
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 10027-1
October
t r s x ICS
y yä r z rä t r Supersedes EN
s r r t yæ sã t r r wEnglish Version
Designation systems for steels æ Part
sã Steel names Systèmes de désignation des aciers æ Partie
sã Désignation symbolique
Bezeichnungssysteme für Stähle æ Teil
sã Kurznamen This European Standard was approved by CEN on
s w July
t r s xä

egulations which stipulate the conditions for giving this European Standard the status of a national standard without any alterationä Upætoædate lists and bibliographical references concerning such national standards may be obtained on application to the CENæCENELEC Management Centre or to any CEN memberä

translation under the responsibility of a CEN member into its own language and notified to the CENæCENELEC Management Centre has the same status as the official versionsä

CEN members are the national standards bodies of Austriaá Belgiumá Bulgariaá Croatiaá Cyprusá Czech Republicá Denmarká Estoniaá Finlandá Former Yugoslav Republic of Macedoniaá Franceá Germanyá Greeceá Hungaryá Icelandá Irelandá Italyá Latviaá Lithuaniaá Luxembourgá Maltaá Netherlandsá Norwayá Polandá Portugalá Romaniaá Slovakiaá Sloveniaá Spainá Swedená Switzerlandá Turkey and United Kingdomä

EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre:
Avenue Marnix 17,
B-1000 Brussels

t r s x CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Membersä Refä Noä EN

s r r t yæ sã t r s x ESIST EN 10027-1:2016
EN10027-1:2016 (E) 2

Contents Page European foreword ....................................................................................................................................... 4 1 Scope .................................................................................................................................................... 5 2 Normative references .................................................................................................................... 5 3 Terms and definitions ................................................................................................................... 5 4 Principles ........................................................................................................................................... 5 4.1 A unique steel name ....................................................................................................................... 5 4.2 Formulation of steel names ......................................................................................................... 5 4.3 Allocation of steel names .............................................................................................................. 6 4.4 Consultation ...................................................................................................................................... 6 5 Reference to product standards ................................................................................................ 6 6 Classification of steel names ....................................................................................................... 6 7 Structure of steel names ............................................................................................................... 6 7.1 Principal symbols ............................................................................................................................ 6 7.2 Additional symbols ......................................................................................................................... 7 7.3 Steels designated according to their application and mechanical or physical properties .......................................................................................................................................... 7 7.4 Steels designated according to chemical composition ................................................... 23 Tables Table 1 — Structural steels ........................................................................................................................ 8 Table 2 — Steels for pressure purposes ............................................................................................. 10 Table 3 — Steels for line pipe ................................................................................................................. 12 Table 4 — Steels for engineering .......................................................................................................... 13 Table 5 —Steels for reinforcing concrete .......................................................................................... 14 Table 6 — Steels for prestressing concrete....................................................................................... 15 Table 7 — Steels for or in the form of rails........................................................................................ 16 Table 8 — Flat products for cold forming (except those in Table 9) ....................................... 18 Table 9 — High strength steel flat products for cold forming .................................................... 19 Table 10 — Tin mill products (steel products for packaging) ................................................... 21 Table 11 — Electrical steels .................................................................................................................... 22 Table 12 — Non-alloy steels (except free cutting steels) with an average manganese content < 1 % ................................................................................................................................. 23 Table 13 — Non-alloy steels with an average manganese content

1 %, non-alloy free-cutting steels and alloy steels (except high speed steels) where the content, by weight,

of every average alloying element is < 5 % ................................. 25 Table 14 — Stainless steels and other alloy steels (except high speed steels) where the average content by weight of at least one alloying element is

5 % ................. 27 Table 15 — High speed steels ................................................................................................................ 29 Table 16 — Symbols for steel products indicating special requirements ............................. 30 SIST EN 10027-1:2016

EN10027-1:2016 (E) 3

Table 17 — Symbols for steel products indicating type of coating .......................................... 30 Table 18 — Symbols for steel products indicating treatment condition ............................... 31 SIST EN 10027-1:2016

EN10027-1:2016 (E) 4

European foreword This document (EN 10027-1:2016) has been prepared by Technical Committee ECISS/TC 100 “Iron and steel - General issues”, the secretariat of which is held by BSI. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by April 2017, and conflicting national standards shall be withdrawn at the latest by April 2017. This document supersedes EN 10027-1:2005. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN shall not be held responsible for identifying any or all such patent rights. According to the CEN-CENELEC Internal Regulations, the national standards organisations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. SIST EN 10027-1:2016

EN10027-1:2016 (E) 5

1 Scope 1.1 This European Standard specifies rules for designating steels by means of symbolic letters and numbers to express application and principal characteristics, e.g. mechanical, physical, chemical, so as to provide an abbreviated identification of steels. NOTE In the English language the designations covered by this European Standard are known as “steel names”; in the French language as “designation symbolique”; in the German language as “Kurznamen”. 1.2 This European Standard applies to steels specified in European Standards (EN), Technical Specifications (TS), Technical Reports (TR) and CEN member's national standards. 1.3 These rules may be applied to non-standardized steels. 1.4 A system of numerical designation of steels known as steel numbers is specified in EN 10027-2. 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 10020:2000, Definition and classification of grades of steel EN 10027-2, Designation systems for steels - Part 2: Numerical system EN 10079:2007, Definition of steel products 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 10020:2000 and EN 10079:2007 apply. 4 Principles 4.1 A unique steel name There shall be one unique steel name for each steel. 4.2 Formulation of steel names Steel names allocated in accordance with this European Standard shall comprise principal symbols as specified in 7.1. In order to avoid ambiguity, it may be necessary to supplement these principal symbols by additional symbols identifying additional characteristics of the steel or steel product, e.g. suitability for use at high or low temperatures, surface condition, treatment condition, de-oxidation. These additional symbols are given in 7.2. SIST EN 10027-1:2016

EN10027-1:2016 (E) 6

Unless otherwise specified in this European Standard the symbols used in the steel name shall be written without spaces. 4.3 Allocation of steel names 4.3.1 For steels specified in European Standards (EN), Technical Specifications (TS) and Technical Reports (TR), steel names shall be allocated by the ECISS Technical Committee concerned. 4.3.2 For steels specified in CEN member's national standards and for other steels, steel names shall be allocated by or under the responsibility of the national standards body concerned. So as to avoid a variety of steel names being assigned to essentially the same steel, the European Registration Office as provided for in EN 10027-2 shall, when a steel number is applied for, cooperate with the national standards body concerned to ensure uniform steel names. 4.4 Consultation Where there are difficulties or disputes in establishing steel names ECISS/TC100 shall be consulted and shall advise accordingly. 5 Reference to product standards The complete designation of a steel product where quoted in orders or similar contractual documents shall include, in addition to the steel name, an indication of the technical delivery requirement in which the steel is specified. For steels specified in standards this shall be the reference number of the relevant product standard. Details of the structures of the steel name for the steel or steel product shall be provided in the relevant product or dimensional standard. 6 Classification of steel names For the purposes of designation, steel names are classified into two main categories: — Category 1: steels designated according to their application and mechanical or physical properties (see 7.3). — Category 2: steels designated according to their chemical composition (see 7.4). 7 Structure of steel names 7.1 Principal symbols Principal symbols for steels designated according to steel application and its mechanical and physical properties shall be assigned in accordance with 7.3. Principal symbols for steels designated according to the chemical composition of the steel shall be assigned in accordance with 7.4. Where a steel is specified in the form of a steel casting, its name as specified in Tables 1 to 15 shall be preceded by the letter G. Where a steel is produced by powder metallurgy, its name as specified in Tables 14 and 15 shall be preceded by the letters PM. SIST EN 10027-1:2016

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7.2 Additional symbols Additional symbols may be added to the principal symbols and assigned in accordance with 7.3 and 7.4. Additional symbols are divided into two groups, i.e. group 1 and group 2 (see 7.3 and 7.4). If the symbols for group 1 are inadequate to describe the steel fully, then additional symbols from group 2 may be added. Symbols of group 2 shall only be used in conjunction with and follow symbols of group 1. Further additional symbols for steel products may follow the additional symbols of group 1 and group 2 and shall be selected in accordance with 7.3 and 7.4 from Tables 16, 17 and 18. These symbols shall be separated from preceding symbols by the plus sign (+). Additional symbols selected from Tables 16, 17 and 18 may be added to steel numbers allocated in accordance with EN 10027–2 and, when used, separated from the steel number by the plus sign (+). 7.3 Steels designated according to their application and mechanical or physical properties The designation of steel according to their application and mechanical or physical properties shall be made in accordance with Table 1 to Table 11. SIST EN 10027-1:2016

EN10027-1:2016 (E) 8
Table 1 — Structural steels

Principal symbols Additional symbols Letter Mechanical property For steel For steel product Group 1 b Group 2 c d G = steel casting (where necessary) S = structural steel nnn = specified minimum yield strength e in MPa f for the smallest thickness range Impact property Energy Joules (J) Test tempe-rature C = Special cold forming D = Hot dip coating E = Enamelling F = Forgings H = Hollow section L =

Low temperature M = Thermomechanically rolled N = Normalized or normalized rolled P = Sheet piling Q = Quenched and tempered S = Ship building T = Tubes W = Weather resistant an = Chemical symbol of specified additional elements, e.g. Cu, together, where necessary, with a single digit representing 10 × the average (rounded to 0,1 %) of that specified range of the content of that element Tables 16, 17 and 18 27J 40J 60J °C JR KR LR 20 J0 K0 L0 0 J2 K2 L2 20 J3 K3 L3 30 J4 K4 L4 40 J5 K5 L5 50 J6 K6 L6 60 A =

Precipitation hardening M =
Thermomechanically rolled N =
Normalized or normalized rolled Q =
Quenched and tempered G =

Other characteristics followed, where necessary by 1 or 2 digits Key 1 = Principal symbols 2 = Additional symbols for steel 3 = Additional symbols for steel products a n = numerical characters, a = alpha characters, an = alphanumeric characters. b Symbols A, M, N and Q in Group 1 apply to fine grain steels. c Symbols of Group 2, other than chemical symbols, may be suffixed by one or two digits in order to distinguish SIST EN 10027-1:2016

EN10027-1:2016 (E) 9

between qualities in accordance with the relevant product standard. d If two of the symbols of this Group are needed the chemical symbol shall be the last one. e The term “yield strength” refers to upper or lower yield strength (ReH) or (ReL) or proof strength (Rp), or proof strength total extension (Rt) depending on the requirement specified in the relevant product standard. f 1 MPa = 1 N/mm2.

Table 1 (continued) Examples of steel names for structural steels Standard Steel name according to

EN 10027–1 EN 10025–2 S235JR S355JR S355J0 S355J2 S355K2 S450J0 EN 10025–3 S355N S355NL EN 10025–4 S355M S355ML EN 10025–5 S235J0W S235J2W S355J0WP S355J2WP S355J0W S355J2W S355K2W EN 10025–6 S460Q S460QL S460QL1 EN 10149–2 S355MC EN 10149–3 S355NC EN 10210–1 S355J2H EN 10248–1 S355GP EN 10346 S350GD S350GD+Z SIST EN 10027-1:2016

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Table 2 — Steels for pressure purposes

Principal symbols Additional symbols Letter Mechanical property For steel For steel products

Group 1 b Group 2 c

G = steel casting (where necessary) P = steels for pressure purposes nnn = specified minimum yield strength d in MPa e for the smallest thickness range B = Gas bottles M = Thermomechanically rolled N = Normalized or normalized rolled Q = Quenched and tempered S = Simple pressure vessels T = Tubes G = Other characteristics followed, where necessary, by 1 or 2 digits H = High temperature L = Low temperature R = Room temperature X = High and low temperature Tables 16, 17 and 18 Key 1 = Principal symbols 2 = Additional symbols for steel 3 = Additional symbols for steel products a n = numerical characters, a = alpha characters, an = alphanumeric characters. b Symbols M, N and Q in group 1 apply to fine grain steels. c Symbols of group 2, other than chemical symbols, may be suffixed by one or two digits in order to distinguish between qualities in accordance with the relevant product standard. d The term “yield strength” refers to upper or lower yield strength (ReH) or (ReL) or proof strength (Rp), or proof strength total extension (Rt) depending on the requirement specified in the relevant product standard. e 1 MPa = 1 N/mm2.

SIST EN 10027-1:2016
EN10027-1:2016 (E) 11

Table 2 (continued) Examples of steel names Standard Steel name according to EN 10027–1 EN 10028–2 P265GH EN 10028–3 P355NH EN 10028–5 P355M P355ML1 EN 10028–6 P355Q P355QH P355QL1 EN 10120 P265NB EN 10207 P265S EN 10213 GP240GR GP240GH SIST EN 10027-1:2016

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Table 3 — Steels for line pipe

Principal symbols Additional symbols Letter Mechanical property For steel For steel products Group 1 b Group 2 L = steels for line pipe nnn = specified minimum yield strength c in MPa d for the smallest thickness range M = Thermomechanically rolled N = Normalized or normalized rolled Q = Quenched and tempered G = Other characteristics followed, where necessary by 1 or 2 digits a = class requirement followed, where necessary, by one digit S = Sour service O = Offshore E = European onshore natural gas transmission Tables 16, 17 and 18 Key 1 = Principal symbols 2 = Additional symbols for steel 3 = Additional symbols for steel products a n = numerical characters, a = alpha characters, an = alphanumeric characters. b Symbols M, N and Q in group 1 apply to fine grain steels. c The term “yield strength” refers to upper or lower yield strength (Re

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