prEN 10338
(Main)Hot rolled and cold rolled non-coated products of multiphase steels for cold forming - Technical delivery conditions
Hot rolled and cold rolled non-coated products of multiphase steels for cold forming - Technical delivery conditions
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.
Warmgewalzte und kaltgewalzte Flacherzeugnisse ohne Überzug aus Mehrphasenstählen zum Kaltumformen - Technische Lieferbedingungen
Dieses Dokument gilt für warm- und kaltgewalzte Flacherzeugnisse ohne Überzug aus Mehrphasenstählen zum Kaltumformen. Es behandelt kaltgewalzte Erzeugnisse von Dicken t < 3 mm und warmgewalzte Erzeugnisse von Dicken t ≤ 6,5 mm.
Diese Erzeugnisse werden geliefert als Blech, Breitband, längsgeteiltes Breitband oder Stäbe, die durch Ablängen von längsgeteiltem Breitband erzeugte werden.
Flacherzeugnisse aus Mehrphasenstählen für die Kaltumformung dürfen mit einem elektrolytischen Zinküberzug nach EN 10152 geliefert werden.
Produits plats non revêtus laminés à chaud et laminés à froid en aciers multiphasés pour formage à froid - Conditions techniques de livraison
Le présent document s’applique aux produits plats laminés à chaud et à froid non revêtus fabriqués en aciers multiphasés pour formage à froid. Elle couvre les produits plats laminés à froid, d’épaisseur t < 3 mm et les produits plats laminés à chaud en continu d’épaisseur t < 6,5 mm.
Ces produits sont livrés sous forme de tôles, de bandes laminées à chaud, de bandes laminées à chaud refendues, de bandes à froid, de bandes laminées à froid refendues ou de longueurs coupées obtenues à partir de bandes larges refendues.
Les produits plats laminés en aciers multiphasés pour formage à froid peuvent être livrés avec un revêtement de zinc selon l’EN 10152.
Vroče in hladno valjani neprevlečeni izdelki večfaznih jekel za hladno oblikovanje - Tehnični dobavni pogoji
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-november-2024
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: prEN 10338
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.
DRAFT
EUROPEAN STANDARD
NORME EUROPÉENNE
EUROPÄISCHE NORM
August 2024
ICS 77.140.50 Will supersede 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 Kaltgewalzte und warmgewalzte Flacherzeugnisse
à froid en aciers en aciers multiphases pour formage à ohne Überzug aus Mehrphasenstählen zum
froid - Conditions techniques de livraison Kaltumformen - Technische Lieferbedingungen
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 459/SC 9.
If this draft becomes a European Standard, 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.
This draft European Standard was established by CEN 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.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.
Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2024 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 10338:2024 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 4
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 . 15
8.3.1 Hot rolled products . 15
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 . 16
9.3 Tests to be carried out . 16
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 . 17
10 Marking . 17
11 Packing . 18
12 Storage and transportation . 18
13 Disputes . 18
Annex A (informative) Steel designation. 19
Bibliography . 20
European foreword
This document (prEN 10338:2024) has been prepared by Technical Committee CEN/TC 459/SC 9
“Coated and uncoated flat products to be used for cold forming”, the secretariat of which is held by
AFNOR.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 10338:2015.
— scope and normative references have been updated;
— definitions have been added in Clause 3;
— example has been added in Clause 5;
— Tables 1, 2, 4 and 5 have been updated.
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 10027-1, Designation systems for steels — Part 1: Steel names
EN 10027-2, Designation systems for steels — Part 2: Numerical system
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
C
steel characterized by a multi-phase microstructure containing mostly a ferritic-bainitic matrix whereas
martensite, tempered martensite, retained austenite and pearlite can be present as additional phases
Note 1 to entry: The extremely fine-grained microstructure is generated by retarded recrystallization or
precipitation of micro-alloying elements. Compared to dual phase steels they show a higher yield ratio, lower work
hardenability and good hole expansion ratios.
3.5
martensitic steel
MS
steel characterized by a mainly martensitic micro-structure with small amounts of ferrite and/or bainite
and a very high strength
Note 1 to entry: The drawability is limited; this steel grade is more suited for bending processes like roll forming.
3.6
dual-phase steel with improved formability
DH
steel microstructure with improved formability consisting mainly of ferrite and martensite and small
amounts of bainite and retai
...
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