SIST EN 10338:2025

SLOVENSKI STANDARD
01-oktober-2025
Vroče in hladno valjani neprevlečeni izdelki večfaznih jekel za hladno oblikovanje -
Tehnični dobavni pogoji
Hot rolled and cold rolled non-coated products of multiphase steels for cold forming -
Technical delivery conditions
Warmgewalzte und kaltgewalzte Flacherzeugnisse ohne Überzug aus
Mehrphasenstählen zum Kaltumformen - Technische Lieferbedingungen
Produits plats non revêtus laminés à chaud et laminés à froid en aciers multiphasés pour
formage à froid - Conditions techniques de livraison
Ta slovenski standard je istoveten z: EN 10338:2025
ICS:
77.140.50 Ploščati jekleni izdelki in Flat steel products and semi-
polizdelki products
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 10338
EUROPEAN STANDARD
NORME EUROPÉENNE
July 2025
EUROPÄISCHE NORM
ICS 77.140.50 Supersedes EN 10338:2015
English Version
Hot rolled and cold rolled non-coated products of
multiphase steels for cold forming - Technical delivery
conditions
Produits plats non revêtus laminés à chaud et laminés Warmgewalzte und kaltgewalzte Flacherzeugnisse
à froid en aciers multiphasés pour formage à froid - ohne Überzug aus Mehrphasenstählen zum
Conditions techniques de livraison Kaltumformen - Technische Lieferbedingungen
This European Standard was approved by CEN on 23 June 2025.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2025 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 10338:2025 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 5
4 Dimensions and tolerances . 6
5 Classification and designation . 6
5.1 Classification. 6
5.2 Designation . 6
6 Information to be supplied at the time of enquiry and order. 7
6.1 Mandatory information . 7
6.2 Options . 7
7 Manufacturing process and delivery conditions . 8
7.1 Manufacturing process . 8
7.2 Delivery conditions . 8
8 Requirements . 9
8.1 Chemical composition . 9
8.2 Mechanical properties . 12
8.3 Surface properties . 16
8.3.1 Hot rolled products . 16
8.3.2 Cold rolled products . 16
8.4 Suitability for surface coating . 16
8.5 Weldability . 16
9 Inspection . 16
9.1 Types of inspection and inspection documents . 16
9.2 Test units . 17
9.3 Tests to be carried out . 17
9.4 Sampling . 17
9.5 Test methods . 17
9.5.1 Tensile test . 17
9.5.2 Strain hardening exponent . 17
9.5.3 Surface inspection . 17
9.6 Retests . 18
10 Marking . 18
11 Packing . 18
12 Storage and transportation . 18
13 Disputes . 18
Annex A (informative) Steel designation. 19
Bibliography . 21

European foreword
This document (EN 10338:2025) has been prepared by Technical Committee CEN/TC 459 “ECISS –
European Committee for Iron and Steel Standardization” , the secretariat of which is held by AFNOR.
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 January 2026, and conflicting national standards shall
be withdrawn at the latest by January 2026.
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.
This document supersedes EN 10338:2015.
In comparison with the previous edition, the following technical modifications have been made:
— scope and normative references have been updated;
— definitions have been added in Clause 3;
— renaming of steel grade HCT1180G2 into HCT1180C and deletion of the family for multiphase steel
(MP);
— addition of four new steel families: dual-phase steels with improved formability (XH), complex-phase
steels with improved formability (CH), multi-phase steels with improved formability (AH) and
martensitic steels (MS);
— addition of cold-rolled multiphase steels for cold forming: HCT780XG, HCT1180X, HCT590XH,
HCT780XH, HCT980XH, HCT1180XH, HCT980CH, HCT1180CH, HCT1370CH, HCT980AH,
HCT1180AH, HCT1100MS, HCT1200MS, HCT1300MS, HCT1500MS and HCT1700MS;
— addition of an informative Annex A about steel designation for multiphase steels for cold forming.
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website. 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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania,
Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the United Kingdom.

Through its sub-committee SC 9 “Coated and uncoated flat products to be used for cold forming” (secretariat:
AFNOR).
1 Scope
This document applies to hot rolled and cold rolled non-coated steel flat products made of multiphase
steels for cold forming. It covers cold rolled products of thicknesses t < 3 mm and hot rolled products of
thicknesses t ≤ 6,5 mm.
These products are delivered in sheet, hot rolled strip, slit hot rolled strip, cold strip, slit cold rolled strip
or cut lengths obtained from slit wide strip.
Flat products of multiphase steels for cold forming can be delivered with an electrolytic zinc coating
according to EN 10152.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. 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 10021, General technical delivery conditions for steel products
EN 10048, Hot rolled narrow steel strip — Tolerances on dimensions and shape
EN 10049, Measurement of roughness average Ra and peak count RPc on metallic flat products
EN 10051, Continuously hot-rolled strip and plate/sheet cut from wide strip of non-alloy and alloy steels —
Tolerances on dimensions and shape
EN 10079, Definition of steel products
EN 10130, Cold rolled low carbon steel flat products for cold forming — Technical delivery conditions
EN 10131, Cold rolled uncoated and zinc or zinc-nickel electrolytically coated low carbon and high yield
strength steel flat products for cold forming — Tolerances on dimensions and shape
EN 10204, Metallic products — Types of inspection documents
EN ISO 377, Steel and steel products — Location and preparation of samples and test pieces for mechanical
testing (ISO 377)
EN ISO 6892-1:2019, Metallic materials — Tensile testing — Part 1: Method of test at room temperature
(ISO 6892-1:2019)
ISO 10275, Metallic materials — Sheet and strip — Determination of tensile strain hardening exponent
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 10020, EN 10021, EN 10079
and EN 10204 and the following apply.
3.1
ferritic-bainitic steel
F
steel characterized by a matrix of ferrite or strengthened ferrite containing bainite or strengthened
bainite
Note 1 to entry: The high strength of the matrix is caused by grain refinement, precipitation of micro-alloying
elements and a high dislocation density.
3.2
dual-phase steel
X
steel microstructure consisting mainly of ferrite and martensite that allows for the additional presence
of bainite with increasing strength
Note 1 to entry: At a given high tensile strength dual phase steels show a low yield ratio (Re/Rm) and a strong work
hardening capacity. Therefore, dual phase steels are especially suited for forming operations with high stretching
portions.
3.3
transformation induced plasticity steel
T
steel characterized by ferritic matrix containing retained austenite capable of transformation into
martensite during the forming process
Note 1 to entry: Also known as trip steel.
Note 2 to entry: Because of high work-hardening rate, the steel reaches high uniform elongation values and high
tensile strength levels.
3.4
complex-phase steel
...