SIST EN 10346:2015
(Main)Continuously hot-dip coated steel flat products - Technical delivery conditions
Continuously hot-dip coated steel flat products - Technical delivery conditions
This European Standard specifies requirements for continuously hot-dip coated products made of low carbon steels for cold forming, of steels for construction, of steels with high proof strength for cold forming and coated with zinc (Z), zinc-iron alloy (ZF), zinc-aluminium alloy (ZA), aluminium-zinc alloy (AZ), aluminium-silicon alloy (AS) or zinc-magnesium alloy (ZM) and for continuously hot-dip coated products made of multiphase steels for cold forming coated with zinc (Z), zinc-iron alloy (ZF), zinc-aluminium alloy (ZA) or zinc-magnesium alloy (ZM) in thicknesses of 0,20 mm ≤ t < 3,0 mm.
By agreement at the time of enquiry and order, this European Standard is applicable to continuously hot-dip coated flat products of an expanded validity range defined for thicknesses t < 0,20mm or in thicknesses 3,0mm < t < 6,5mm with agreed mechanical properties and test specimens, adhesion of coating and surface condition requirements.
The thickness is the final thickness of the delivered product after coating.
This document applies to strip of all widths and to sheets cut from it (≥ 600 mm width) and cut lengths
(< 600 mm width).
NOTE 1 Products coated with (pure) aluminium can also be available, but are not covered by this European standard.
NOTE 2 The products covered by this European Standard are used where cold formability, high strength, a defined minimum yield strength and corrosion resistance are the most important factors. Corrosion resistance of the product is proportional to the coating thickness, hence to its mass (see also 7.3.2). The products covered by this European Standard can be used as substrates for organic coated flat products specified in EN 10169 for building and general engineering applications.
NOTE 3 By agreement at the time of enquiry and order, this European standard is applicable to other continuously hot-dip coated hot rolled steel flat products (e.g. in accordance with EN 10149-2).
Kontinuierlich schmelztauchveredelte Flacherzeugnisse aus Stahl - Technische Lieferbedingungen
Diese Europäische Norm legt die Anforderungen an kontinuierlich schmelztauchveredelte Flacherzeugnisse aus weichen Stählen zum Kaltumformen, Stählen für die Anwendung im Bauwesen, Stählen mit hoher Dehngrenze zum Kaltumformen mit Überzügen aus Zink (Z), Zink Eisen Legierung (ZF), Zink Aluminium Legierung (ZA), Aluminium Zink Legierung (AZ), Aluminium Silicium Legierung (AS) oder Zink-Magnesium-Legierung (ZM) sowie aus Mehrphasenstählen zum Kaltumformen mit Überzügen aus Zink (Z), Zink Eisen Legierung (ZF), Zink Aluminium Legierung (ZA) oder Zink-Magnesium-Legierung (ZM) in Dicken von 0,20 mm ≤ t < 3,0 mm, fest.
Diese Europäische Norm darf, falls zum Zeitpunkt der Anfrage und Bestellung vereinbart, auch für kontinuierlich schmelztauchveredelte Flacherzeugnisse in Dicken t < 0,20 mm bzw. 3,0 mm ≤ t ≤ 6,5 mm angewendet werden. In diesem Fall müssen die mechanischen Eigenschaften, die Prüfproben, die Haftung des metallischen Überzuges und die Anforderungen an die Oberflächenqualität vereinbart werden.
Als Dicke gilt die Enddicke des gelieferten Erzeugnisses nach dem Veredeln.
Dieses Dokument gilt für Band aller Breiten und daraus abgelängte Bleche (³ 600 mm Breite) sowie für abgelängte Stäbe (< 600 mm Breite).
ANMERKUNG 1 Erzeugnisse mit Überzügen aus (reinem) Aluminium können auch lieferbar sein, sind aber nicht Gegenstand dieses Dokuments.
ANMERKUNG 2 Die Erzeugnisse nach dieser Europäischen Norm eignen sich vorzugsweise für Anwendungen, bei denen die Kaltumformbarkeit, hohe Festigkeit, eine definierte Mindeststreckgrenze und Beständigkeit gegen Korrosion von vorrangiger Bedeutung sind. Der durch den Überzug bewirkte Korrosionsschutz ist der Dicke des Überzugs, d. h. der Auflagenmasse, proportional (siehe auch 7.3.2). Erzeugnisse nach dieser Europäischen Norm können als Substrate für Flacherzeugnisse mit organischer Beschichtung nach EN 10169 für den Einsatz im Bauwesen und für allgemeine technische Anwen¬dungen verwendet werden.
ANMERKUNG 3 Nach Vereinbarung bei der Anfrage und Bestellung ist dieses Dokument auch auf andere kontinuierlich schmelztauchveredelte warmgewalzte Flacherzeugnisse (z. B. nach EN 10149 2) anwendbar.
Produits plats en acier revêtus en continu par immersion à chaud - Conditions techniques de livraison
La présente Norme européenne spécifie les exigences relatives aux produits en acier revêtus en continu par immersion à chaud constitués d’aciers à bas carbone pour le formage à froid, d’aciers de construction, d’aciers à haute limite d’élasticité pour le formage à froid, et revêtus de zinc (Z), d’alliage zinc-fer (ZF), d’alliage zinc-aluminium (ZA), d’alliage aluminium-zinc (AZ) ou d’alliage aluminium-silicium (AS), et aux produits galvanisés à chaud en continu en aciers multiphases pour le formage à froid revêtus de zinc (Z), d’alliage zinc-fer (ZF), d’alliage zinc-aluminium (ZA) ou alliage zinc-magnésium (ZM) avec des épaisseurs allant de 0,20 mm à 3,0 mm, sauf indication contraire.
Par accord au moment de l’appel d’offres et de la commande, la présente Norme européenne est applicable aux produits plats revêtus en continu de domaines étendus de validité définis pour les épaisseurs t < 0,20 mm ou bien 3,0 mm < t < 6,5 mm possédant des propriétés mécaniques et des éprouvettes d’essai, des conditions d’adhésion du revêtement et des états de surface définis par accord.
L’épaisseur considérée est l’épaisseur finale du produit livré après revêtement.
Le présent document est applicable aux bandes de toutes largeurs ainsi qu’aux tôles (largeur ≥ 600 mm) et aux bandes refendues couplées à la longueur (largeur < 600 mm) qui y sont découpées.
NOTE 1 Des produits revêtus d’aluminium (pur) peuvent également être disponibles, mais ils ne sont pas concernés par le présent document.
NOTE 2 Les produits couverts par cette Norme européenne sont utilisés lorsque le formage à froid, une résistance élevée, une limite d’élasticité minimale définie et une résistance à la corrosion sont les facteurs les plus importants. La résistance du produit à la corrosion est propor¬tionnelle à la masse du revêtement (voir aussi 7.3.2).
NOTE 3 Par accord au moment de l’appel d’offres et de la commande, le présent document peut être appliqué à d’autres produits plats en aciers laminés à chaud revêtus par immersion à chaud en continu (par exemple, conformes à l’EN 10149-2).
Kontinuirno vroče prevlečeni jekleni ploščati izdelki - Tehnični dobavni pogoji
Ta evropski standard določa zahteve za kontinuirno vroče prevlečene jeklene ploščate izdelke, izdelane iz maloogljičnih jekel za hladno oblikovanje, iz konstrukcijskih jekel, iz jekel z veliko dogovorno napetostjo tečenja za hladno oblikovanje, prevlečene s cinkom (Z), z zlitino cinka in železa (ZF), zlitino cinka in aluminija (ZA), zlitino aluminija in cinka (AZ), zlitino aluminija in silicija (AS) ali zlitino cinka in magnezija (ZM), ter za kontinuirno vroče prevlečene izdelke, izdelane iz večfaznih jekel za hladno oblikovanje, prevlečene s cinkom (Z), z zlitino cinka in železa (ZF), zlitino cinka in aluminija (ZA) ali zlitino cinka in magnezija (ZM), debeline 0,20 mm ≤ t < 3,0 mm.
Ta evropski standard je mogoče po dogovoru v času povpraševanja in naročila uporabiti za kontinuirno vroče prevlečene jeklene ploščate izdelke z razširjenim območjem veljave, opredeljenim za debelino t < 0,20 mm ali debelino 3,0 mm < t < 6,5 mm, z dogovorjenimi mehanskimi lastnostmi ter zahtevami za preskušance, sprijemljivost prevleke in stanje površine.
Debelina je končna debelina dobavljenega izdelka po prevlečenju.
Ta dokument se uporablja za trakove vseh širin ter iz njih urezane plošče (širina ≥ 600 mm) in rezane dolžine
(širina < 600 mm).
OPOMBA 1: Na voljo so lahko tudi izdelki, prevlečeni s (čistim) aluminijem, ki niso zajeti v tem evropskem standardu.
OPOMBA 2: Izdelki, ki so zajeti v tem evropskem standardu, se uporabljajo, kjer so najpomembnejši dejavniki hladna oblikovalnost, visoka trdnost, določena najmanjša meja tečenja in korozijska odpornost. Korozijska odpornost izdelka je sorazmerna z debelino prevleke, torej z njeno maso (glej tudi 7.3.2). Izdelke, ki jih zajema ta evropski standard, je mogoče uporabiti kot podlago za organsko prevlečene ploščate izdelke, določene v standardu EN 10169 za visoke ali nizke gradnje.
OPOMBA 3: Ta evropski standard je mogoče po dogovoru v času povpraševanja in naročila uporabiti za druge kontinuirno vroče prevlečene jeklene ploščate izdelke (npr. v skladu s standardom EN 10149-2).
General Information
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Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Kontinuierlich schmelztauchveredelte Flacherzeugnisse aus Stahl - Technische LieferbedingungenProduits plats en acier revêtus en continu par immersion à chaud - Conditions techniques de livraisonContinuously hot-dip coated steel flat products - Technical delivery conditions77.140.50SROL]GHONLFlat steel products and semi-productsICS:Ta slovenski standard je istoveten z:EN 10346:2015SIST EN 10346:2015en,fr,de01-oktober-2015SIST EN 10346:2015SLOVENSKI
STANDARDSIST EN 10346:20091DGRPHãþD
SIST EN 10346:2015
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 10346
July 2015 ICS 77.140.50 Supersedes EN 10346:2009English Version
Continuously hot-dip coated steel flat products for cold forming -Technical delivery conditions
Produits plats en acier revêtus en continu par immersion à chaud pour formage à froid - Conditions techniques de livraison
Kontinuierlich schmelztauchveredelte Flacherzeugnisse aus Stahl - Technische Lieferbedingungen This European Standard was approved by CEN on 16 April 2015.
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, 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 United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre:
Avenue Marnix 17,
B-1000 Brussels © 2015 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 10346:2015 ESIST EN 10346:2015
EN 10346:2015 (E) 2 Contents Page European foreword .5 1 Scope .6 2 Normative References .6 3 Terms and definitions .7 4 Classification and designation .9 4.1 Classification .9 4.1.1 General .9 4.1.2 Low carbon steels for cold forming .9 4.1.3 Steels for construction . 10 4.1.4 Steels with high proof strength for cold forming . 10 4.1.5 Multiphase steels for cold forming . 10 4.2 Designation . 10 4.2.1 Steel names . 10 4.2.2 Steel numbers . 10 5 Information to be supplied by the purchaser . 10 5.1 Mandatory information . 10 5.2 Options . 11 6 Manufacturing and processing . 12 6.1 Manufacturing . 12 6.2 Processing . 12 6.2.1 Ageing . 12 6.2.2 Coating appearance . 12 6.2.3 Surface protection . 12 7 Requirements . 12 7.1 Chemical composition . 12 7.2 Mechanical properties . 17 7.2.1 General . 17 7.2.2 Low carbon steels for cold forming . 18 7.2.3 Steels for construction . 20 7.2.4 Steels with high proof strength for cold forming . 20 7.2.5 Multiphase steels for cold forming . 22 7.3 Type of coatings and coating mass . 23 7.4 Coating finish . 26 7.4.1 General . 26 7.4.2 Zinc coated products (Z) . 26 7.4.3 Zinc-iron alloy coated products (ZF) . 26 7.4.4 Zinc-aluminium coated products (ZA) . 26 7.4.5 Zinc-magnesium coated products (ZM) . 26 7.4.6 Aluminium-zinc coated products (AZ) . 26 7.4.7 Aluminium-silicon coated products (AS) . 26 7.5 Surface quality . 27 7.5.1 General . 27 7.5.2 Types of surface qualities . 29 7.5.3 Roughness . 29 7.6 Surface treatment (surface protection) . 29 7.6.1 General . 29 7.6.2 Chemical passivation (C) . 30 7.6.3 Oiling (O) . 30 SIST EN 10346:2015
EN 10346:2015 (E) 3 7.6.4 Chemical passivation and oiling (CO) . 30 7.6.5 Phosphating (P) . 30 7.6.6 Sealing (S) . 30 7.7 Coil breaks and bends (kinks) . 30 7.7.1 Freedom from coil breaks. 30 7.7.2 Bends (kinks) by winding on coiler drums . 31 7.8 Stretcher strains . 31 7.9 Coating mass . 31 7.10 Adhesion of coating . 31 7.11 Surface condition . 31 7.12 Tolerances on dimensions and shape . 31 7.13 Suitability for further processing . 32 8 Inspection . 32 8.1 Types of inspection and inspection documents . 32 8.2 Test units . 32 8.3 Tests to be carried out . 32 8.4 Sampling. 32 8.5 Test methods . 33 8.5.1 Tensile test . 33 8.5.2 Plastic strain ratio and hardening exponent . 33 8.5.3 Bake Hardening index . 33 8.5.4 Surface inspection . 33 8.5.5 Coating mass . 34 8.6 Retests . 34 9 Marking . 34 10 Packing . 34 11 Storage and transportation . 35 Annex A (normative)
Reference method for determination of the zinc, zinc-iron, zinc-aluminium, zinc-magnesium and aluminium-zinc coating mass . 36 A.1 Principle. 36 A.2 Reagent and preparation of the solution . 36 A.2.1 Reagent. 36 A.2.2 Preparation of the solution . 36 A.3 Apparatus . 36 A.4 Procedure . 36 Annex B (normative)
Reference method for determination of the aluminium-silicon coating mass . 37 B.1 Principle. 37 B.2 Reagents. 37 B.3 Procedure . 37 B.3.1 Samples . 37 B.3.2 Method . 37 B.4 Evaluation. 37 Annex C (normative)
Method for determination of the mass of the Al-Fe-Si alloy layer . 38 C.1 Principle. 38 C.2 Reagents. 38 C.2.1 Tin (II) chloride solution . 38 SIST EN 10346:2015
EN 10346:2015 (E) 4 C.3 Procedure . 38 C.3.1 Removal of the non-alloy layer . 38 C.3.2 Determination of alloy layer . 38 C.4 Evaluation . 38 Annex D (informative) Technical changes from the previous edition . 39 D.1 Introduction . 39 D.2 Technical changes . 39 Bibliography . 41
SIST EN 10346:2015
EN 10346:2015 (E) 5 European foreword This document (EN 10346:2015) has been prepared by Technical Committee ECISS/TC 109 “Coated and uncoated flat products to be used for cold forming”, 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 2016, and conflicting national standards shall be withdrawn at the latest by January 2016. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 10346:2009. 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 10346:2015
EN 10346:2015 (E) 6 1 Scope This European Standard specifies requirements for continuously hot-dip coated products made of low carbon steels for cold forming, of steels for construction and of steels with high proof strength for cold forming coated with zinc (Z), zinc-iron alloy (ZF), zinc-aluminium alloy (ZA), aluminium-zinc alloy (AZ), aluminium-silicon alloy (AS) or zinc-magnesium alloy (ZM) and for continuously hot-dip coated products made of multiphase steels for cold forming coated with zinc (Z), zinc-iron alloy (ZF), zinc-aluminium alloy (ZA) or zinc-magnesium alloy (ZM) in thicknesses of 0,20 mm=≤=t < 3,0 mm. By agreement at the time of enquiry and order, this European Standard is applicable to continuously hot-dip coated flat products of an expanded validity range defined for thicknesses t < 0,20mm or in thicknesses 3,0 mm ≤ t ≤ 6,5 mm with agreed mechanical properties and test specimens, adhesion of coating and surface condition requirements. The thickness is the final thickness of the delivered product after coating. This=document=applies=to=strip=of=all=widths=and=to=sheets=cut=from=it=(≥=600=mm=widthc=and=cut=lengths= (< 600 mm width). NOTE 1 Products coated with (pure) aluminium can also be available, but are not covered by this European standard. NOTE 2 The products covered by this European Standard are used where cold formability, high strength, a defined minimum yield strength and/or corrosion resistance are the most important factors. Corrosion resistance of the product is proportional to the coating thickness, hence to its mass (see also 7.3.2). The products covered by this European Standard can be used as substrates for organic coated flat products specified in EN 10169 for building and general engineering applications. NOTE 3 By agreement at the time of enquiry and order, this European Standard is applicable to other continuously hot-dip coated hot rolled steel flat products (e.g. in accordance with EN 10149-2). 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 606, Bar coding - Transport and handling labels for steel products EN 10020:2000, Definition and classification of grades of steel EN 10021:2006, 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 10049, Measurement of roughness average Ra and peak count RPc on metallic flat products EN 10079:2007, Definition of steel products EN 10143, Continuously hot-dip coated steel sheet and strip - Tolerances on dimensions and shape EN 10204:2004, Metallic products - Types of inspection documents EN 10325, Steel - Determination of yield strength increase by the effect of heat treatment [Bake-Hardening-Index] SIST EN 10346:2015
EN 10346:2015 (E) 7 EN ISO 6892-1:2009, Metallic materials - Tensile testing - Part 1: Method of test at room temperature (ISO 6892-1:2009) ISO 10113, Metallic materials — Sheet and strip — Determination of plastic strain ratio 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 10020:2000, EN 10021:2006, EN 10079:2007, EN 10204:2004 and the following apply. NOTE General definitions and guidelines for the protection of iron and steel can be found in EN ISO 14713. 3.1 hot-dip zinc coating (Z) application of a zinc coating by immersing the prepared strip in a molten bath of zinc Note 1 to entry: The zinc content is at least 99%. Note 2 to entry: See also 7.4.2. 3.2 hot-dip zinc-iron alloy coating (ZF) application of a zinc-iron coating by immersing the prepared strip in a molten bath of zinc and a subsequent annealing Note 1 to entry: The zinc content of the bath is at least 99%. Note 2 to entry: The annealing produces an iron-zinc coating with an iron content of normally 8 % to 12 %. Note 3 to entry: See also 7.4.3. 3.3 hot-dip zinc-aluminium coating (ZA) application of a zinc-aluminium coating by immersing the prepared strip in a molten bath of zinc-aluminium Note 1 to entry: The composition of the bath is approximately 5% aluminium, small amounts of mischmetal and the balance zinc. Note 2 to entry: See also 7.4.4. 3.4 hot dip zinc-magnesium coating (ZM) application of a zinc-magnesium coating by immersing the prepared strip in a molten bath of zinc-aluminium-magnesium Note 1 to entry: The composition of the bath is sum of aluminium and magnesium from 1,5 % to 8 %, containing minimum of 0,2 % magnesium and the balance zinc. Note 2 to entry: For information on chemical composition and density, the manufacturer may be asked for advice. Note 3 to entry: See also 7.4.5. SIST EN 10346:2015
EN 10346:2015 (E) 8 3.5 hot-dip aluminium-zinc alloy coating (AZ) application of an aluminium-zinc coating by immersing the prepared strip in a molten bath of aluminium-zinc-silicon Note 1 to entry: The composition of the bath is 55% of aluminium, 1,6% of silicon and the balance zinc. Note 2 to entry: See also 7.4.6. 3.6 hot-dip aluminium-silicon alloy coating (AS) application of an aluminium-silicon coating by immersing the prepared strip in a molten bath of aluminium-silicon Note 1 to entry: The composition of the bath is 8 % to 11 % silicon and the balance aluminium. Note 2 to entry: See also 7.4.7. 3.7 bake-hardening steel (B)1) steel exhibiting an increase in proof strength following heating in the region of 170 °C for 20 min Note 1 to entry: These steels have a good suitability for cold forming and present a high resistance to plastic straining (which is increased on finished parts during heat treatment) and a good dent resistance. 3.8 complex-phase steel (C)1) steel with a multiphase microstructure containing mainly bainite, ferrite, whereas martensite, tempered martensite, retained austenite and pearlite may be present as additional phases Note 1 to entry: The fine grained microstructure may be generated by retarded recrystallisation or precipitation of micro-alloying elements. 3.9 dual-phase steel (X)1) steel consisting of mainly ferrite and martensite and possible bainite as a complementary phase Note 1 to entry: According to their high tensile strength levels, dual phase steels show a low yield strength ratio and a high work hardening rate. 3.10 ferritic-bainitic steel (F)1) steel with a matrix of ferrite or strengthened ferrite containing bainite or strengthened bainite Note 1 to entry: The strengthening of the matrix is caused by a high density of dislocations, by grain refinement and precipitation of micro-alloying elements. 3.11 high strength interstitial free steel (Y)1) steel whose composition is controlled to achieve improved plastic strain ratio r and strain hardening exponent n values Note 1 to entry: These steels have both, a high mechanical strength and an excellent suitability for cold forming, due to their solid solution hardening and interstitial free microstructure.
1) Symbol used in the steel name (see Tables 3, 4 and 5). SIST EN 10346:2015
EN 10346:2015 (E) 9 3.12 low alloy/micro-alloyed steel (LA)1) steel containing one or more of alloying elements Nb, Ti and V to achieve required proof strength levels Note 1 to entry: Combined precipitation and grain refinement hardening modes allow reaching a high mechanical resistance while reducing the content of alloying elements. Note 2 to entry: Alternatively, carbon-manganese alloying concepts in combination with grain refinement may be used. 3.13 low carbon steel steel with low carbon content characterized by low yield strength and high ductility 3.14 steel for construction steel with minimum strength levels and no special demand for suitability for cold forming 3.15 transformation induced plasticity steel (T)1) steel with a ferritic matrix containing retained austenite capable of transformation into martensite during the forming process (TRIP effect) Note 1 to entry: Because of high work-hardening rate the steel reaches high uniform elongation values and high tensile strength levels. 3.16 coating mass total mass of coating given for both surfaces (see 7.9) Note 1 to entry: In combination with the symbol for the coating type (Z, ZF, ZA, ZM, AZ, AS), the nominal coating mass is used as coating designation. Note 2 to entry: The coating mass is expressed in grams per square metre. 4 Classification and designation 4.1 Classification 4.1.1 General The steels covered by this document are alloy quality steels (steels in accordance with Tables 1, 3, 4 and 5) or non-alloy quality steels (steels in accordance with Table 2) in accordance with EN 10020:2000. 4.1.2 Low carbon steels for cold forming The steel grades are classified in accordance with their increasing suitability for cold forming as follows (see Table 7): — DX51D: bending and profiling quality; — DX52D: drawing quality; — DX53D: deep drawing quality; — DX54D: special deep drawing quality; — DX55D: special deep drawing quality (only +AS); SIST EN 10346:2015
EN 10346:2015 (E) 10 — DX56D: extra deep drawing quality; — DX57D: super deep drawing quality. 4.1.3 Steels for construction The steel grades are classified in accordance with their increasing minimum proof strength Rp0,2 (see Table 8). 4.1.4 Steels with high proof strength for cold forming The steel grades are classified in accordance with their increasing minimum proof strength Rp0,2 (see Table 9). 4.1.5 Multiphase steels for cold forming The steel grades are classified in accordance with their increasing minimum tensile strength Rm (see Tables 10 and 11). 4.2 Designation 4.2.1 Steel names The steel names in accordance with this document are allocated in accordance with EN 10027-1. 4.2.2 Steel numbers The steel numbers in accordance with this document are allocated in accordance with EN 10027-2. 5 Information to be supplied by the purchaser 5.1 Mandatory information The following information shall be supplied by the purchaser at the time of enquiry and order: a) quantity to be delivered; b) type of product (strip, sheet, cut length); c) number of the dimensional standard (EN 10143); d) nominal dimensions and the tolerances on dimensions and shape and, if applicable, letters denoting relevant special tolerances; e) term "steel"; f) number of this document, i.e. EN 10346; g) steel name or steel number and symbol for the type of hot-dip coating as given in Tables 1 to 5; h) number designating the nominal ma
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SLOVENSKI STANDARD
oSIST prEN 10346:2013
01-september-2013
.RQWLQXLUQRYURþHSUHYOHþHQLMHNOHQLSORãþDWLL]GHONL7HKQLþQLGREDYQLSRJRML
Continuously hot-dip coated steel flat products - Technical delivery conditions
Kontinuierlich schmelztauchveredelte Flacherzeugnisse aus Stahl - Technische
Lieferbedingungen
Produits plats en acier revêtus en continu par immersion à chaud - Conditions
techniques de livraison
Ta slovenski standard je istoveten z: prEN 10346
ICS:
77.140.50 3ORãþDWLMHNOHQLL]GHONLLQ Flat steel products and semi-
SROL]GHONL products
oSIST prEN 10346:2013 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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oSIST prEN 10346:2013
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oSIST prEN 10346:2013
EUROPEAN STANDARD
DRAFT
prEN 10346
NORME EUROPÉENNE
EUROPÄISCHE NORM
March 2013
ICS 77.140.50 Will supersede EN 10346:2009
English Version
Continuously hot-dip coated steel flat products - Technical
delivery conditions
Produits plats en acier revêtus en continu par immersion à Kontinuierlich schmelztauchveredelte Flacherzeugnisse
chaud - Conditions techniques de livraison aus Stahl - Technische Lieferbedingungen
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee ECISS/TC 109.
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, 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 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
Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2013 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 10346:2013: E
worldwide for CEN national Members.
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Contents Page
1 Scope .5
2 Normative references .5
3 Terms and definitions .6
4 Classification and designation .8
4.1 Classification .8
4.1.1 General .8
4.1.2 Low carbon steels for cold forming .8
4.1.3 Steels for construction .8
4.1.4 Steels with high proof strength for cold forming .8
4.1.5 Multiphase steels for cold forming .8
4.2 Designation .9
4.2.1 Steel names .9
4.2.2 Steel numbers .9
5 Information to be supplied by the purchaser .9
5.1 Mandatory information .9
5.2 Options .9
6 Manufacturing and processing . 10
6.1 Manufacturing . 10
6.2 Processing . 10
6.2.1 Ageing . 10
6.2.2 Coating appearance . 11
6.2.3 Surface protection . 11
7 Requirements . 11
7.1 Chemical composition . 11
7.2 Mechanical properties . 16
7.2.1 General . 16
7.2.2 Low carbon steels for cold forming . 17
7.2.3 Steels for construction . 18
7.2.4 Steels with high proof strength for cold forming . 19
7.2.5 Multiphase steels for cold forming . 20
7.3 Type of coatings and coating mass . 22
7.4 Coating finish . 25
7.4.1 General . 25
7.4.2 Zinc coated products (Z) . 25
7.4.3 Zinc-iron alloy coated products (ZF) . 25
7.4.4 Zinc-aluminium coated products (ZA) . 25
7.4.5 Zinc-magnesium coated products (ZM) . 25
7.4.6 Aluminium-zinc coated products (AZ) . 25
7.4.7 Aluminium-silicon coated products (AS) . 25
7.5 Surface quality . 26
7.5.1 General . 26
7.5.2 Types of surface qualities . 27
7.5.3 Roughness . 27
7.6 Surface treatment (surface protection) . 28
7.6.1 General . 28
7.6.2 Chemical passivation (C) . 28
7.6.3 Oiling (O) . 28
7.6.4 Chemical passivation and oiling (CO) . 29
7.6.5 Phosphating (P) . 29
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7.6.6 Sealing (S) . 29
7.7 Coil breaks and bends (kinks) . 29
7.7.1 Freedom from coil breaks . 29
7.7.2 Bends (kinks) by winding on coiler drums . 29
7.8 Stretcher strains . 29
7.9 Coating mass . 29
7.10 Adhesion of coating . 30
7.11 Surface condition . 30
7.12 Tolerances on dimensions and shape . 30
7.13 Suitability for further processing . 30
8 Inspection . 30
8.1 Types of inspection and inspection documents . 30
8.2 Test units . 31
8.3 Tests to be carried out . 31
8.4 Sampling . 31
8.5 Test methods . 32
8.5.1 Tensile test . 32
8.5.2 Plastic strain ratio and hardening exponent . 32
8.5.3 Bake Hardening index . 33
8.5.4 Surface inspection . 33
8.5.5 Coating mass . 33
8.6 Retests . 33
9 Marking . 33
10 Packing . 34
11 Storage and transportation . 34
Annex A (normative) Reference method for determination of the zinc, zinc-iron, zinc-aluminium,
zinc-magnesium and aluminium-zinc coating mass . 35
A.1 Principle . 35
A.2 Reagent and preparation of the solution . 35
A.2.1 Reagent . 35
A.2.2 Preparation of the solution . 35
A.3 Apparatus . 35
A.4 Procedure . 35
Annex B (normative) Reference method for determination of the aluminium-silicon coating mass. 36
B.1 Principle . 36
B.2 Reagents . 36
B.3 Procedure . 36
B.3.1 Samples . 36
B.3.2 Method . 36
B.4 Evaluation . 36
Annex C (normative) Method for determination of the mass of the Al-Fe-Si alloy layer . 37
C.1 Principle . 37
C.2 Reagents . 37
C.2.1 Tin (II) chloride solution . 37
C.3 Procedure . 37
C.3.1 Removal of the non-alloy layer . 37
C.3.2 Determination of alloy layer . 37
C.4 Evaluation . 37
Bibliography . 38
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Foreword
This document (prEN 10346:2013) has been prepared by Technical Committee ECISS/TC 109 “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 10346:2009.
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1 Scope
This European Standard specifies requirements for continuously hot-dip coated products made of low carbon
steels for cold forming, of steels for construction, of steels with high proof strength for cold forming and coated
with zinc (Z), zinc-iron alloy (ZF), zinc-aluminium alloy (ZA), aluminium-zinc alloy (AZ), aluminium-silicon alloy
(AS) or zinc-magnesium alloy (ZM) and for continuously hot-dip coated products made of multiphase steels for
cold forming coated with zinc (Z), zinc-iron alloy (ZF), zinc-aluminium alloy (ZA) or zinc-magnesium alloy (ZM)
in thicknesses of 0,20 mm ≤ t < 3,0 mm.
By agreement at the time of enquiry and order, this European Standard is applicable to continuously hot-dip
coated flat products of an expanded validity range defined for thicknesses t < 0,20mm or in thicknesses
3,0mm < t < 6,5mm with agreed mechanical properties and test specimens, adhesion of coating and surface
condition requirements.
The thickness is the final thickness of the delivered product after coating.
This document applies to strip of all widths and to sheets cut from it (≥ 600 mm width) and cut lengths
(< 600 mm width).
NOTE 1 Products coated with (pure) aluminium can also be available, but are not covered by this European standard.
NOTE 2 The products covered by this European Standard are used where cold formability, high strength, a defined
minimum yield strength and corrosion resistance are the most important factors. Corrosion resistance of the product is
proportional to the coating thickness, hence to its mass (see also 7.3.2). The products covered by this European Standard
can be used as substrates for organic coated flat products specified in EN 10169 for building and general engineering
applications.
NOTE 3 By agreement at the time of enquiry and order, this European standard is applicable to other continuously hot-
dip coated hot rolled steel flat products (e.g. in accordance with EN 10149-2).
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 606, Bar coding – Transport and handling labels for steel products
EN 10020:2000, Definition and classification of grades of steel
EN 10021:2006, General technical delivery conditions for steel products
EN 10027-1, Designation systems for steels – Part 1: Steel names
EN 10027-2, Designation systems for steel – Part 2: Numerical system
EN 10049:2005, Measurement of roughness average Ra and peak count RPc on metallic flat products
EN 10079:2007, Definition of steel products
EN 10143, Continuously hot-dip coated steel sheet and strip – Tolerances on dimensions and shape
EN 10204:2004, Metallic products – Types of inspection documents
EN 10325:2006, Steel – Determination of yield strength increase by the effect of heat treatment (Bake-
Hardening-Index)
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EN ISO 6892-1:2009, Metallic materials – Tensile testing – Part 1: Method of test at ambient temperature (ISO
6892-1:2009)
ISO 10113:2006, Metallic materials – Sheet and strip – Determination of plastic strain ratio
ISO 10275:2007, 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 10020:2000, EN 10021:2006, EN
10079:2007, EN 10204:2004 and the following apply.
NOTE General definitions and guidelines for the protection of iron and steel can be found in EN ISO 14713.
3.1
hot-dip zinc coating (Z)
application of a zinc coating by immersing the prepared strip in a molten bath containing a zinc content of at
least 99 % (see also 7.4.2)
3.2
hot-dip zinc-iron alloy coating (ZF)
application of a zinc coating by immersing the prepared strip in a molten bath containing a zinc content of at
least 99 % and a subsequent annealing which produces an iron-zinc coating with an iron content of normally 8
% to 12 % (see also 7.4.3)
3.3
hot-dip zinc-aluminium alloy coating (ZA)
application of a zinc-aluminium coating by immersing the prepared strip in a molten bath which is composed of
zinc and approximately 5 % aluminium and small amounts of mischmetal (see also 7.4.4)
3.4
hot dip zinc-magnesium coating (ZM)
application of a zinc-magnesium coating by passing the prepared strip through a molten zinc bath with
aluminium and magnesium contents in sum of 1,5 to 8 % by mass (see also 7.4.5)
3.5
hot-dip aluminium-zinc alloy coating (AZ)
application of an aluminium-zinc coating by immersing the prepared strip in a molten bath which is composed
of 55 % aluminium, 1,6 % silicon and the balance zinc (see also 7.4.6)
3.6
hot-dip aluminium-silicon alloy coating (AS)
application of an aluminium-silicon coating by immersing the prepared strip in a molten bath which is
composed of aluminium and 8 % to 11 % silicon (see also 7.4.7)
3.7
1)
bake-hardening steel (B)
steel exhibiting an increase in proof strength following heating in the region of 170 °C for 20 min
Note 1 to entry: These steels have a good suitability for cold forming and present a high resistance to plastic straining
(which is increased on finished parts during heat treatment) and a good dent resistance.
1)
Symbol used in the steel name (see Table 3).
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3.8
complex-phase steel
CP steel
steel with a multiphase microstructure containing mostly a ferritic-bainitic matrix as well as martensite,
tempered martensite, retained austenite and pearlite as additional phases
Note 1 to entry: The fine grained microstructure may be generated by retarded recrystallisation or precipitation of
micro-alloying elements.
3.9
dual-phase steel
DP steel
steel with a ferritic matrix containing a martensitic second phase present in the form of islands and possibly
bainite as a complementary phase
Note 1 to entry: According to their high tensile strength levels, dual phase steels show a low yield strength ratio and a
high work hardening rate.
3.10
ferritic-bainitic steel
FB steel
Steel with a matrix of ferrite or strengthened ferrite containing bainite or strengthened bainite
Note 1 to entry: The strengthening of the matrix is caused by a high density of dislocations, by grain refinement and
precipitation of micro-alloying elements.
3.11
2)
interstitial free steel (Y)
IF steel
steel with a controlled composition to achieve improved r- and n-values
Note 1 to entry: These steels have both, a high mechanical strength and an excellent suitability for cold forming, due
to their solid solution hardening and interstitial free microstructure.
3.12
1)
low alloy/micro-alloyed steel (LA)
High strength steels obtained through alloy additions of niobium, titanium, and vanadium.
Note 1 to entry: Those alloying elements can be added either alone or in combination. Alternatively, carbon-
manganese alloying concepts in combination with grain refinement can be used.
Note 2 to entry: Combined precipitation and grain refinement hardening modes allow reaching a high mechanical
resistance while reducing the content of alloying elements.
3.13
Low carbon steel
steel designated by rolling type (hot or cold rolled) and a steel name DX51D to DX57D
Note 1 to entry: Higher grades correspond to better formability.
3.14
Steel for construction
basic steel with different strength levels and no special demand for suitability for cold forming
2) Symbol used in the steel name (see Table 3)
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3.15
transformation induced plasticity steel
TRIP steel
steel with a mainly ferritic matrix containing retained austenite capable of transformation into martensite during
the forming process (TRIP effect)
Note 1 to entry: Because of high work-hardening rate the steel reaches high uniform elongation values and high
tensile strength levels.
3.16
coating mass
Total mass of coating (expressed in grams per square metre) given for both surfaces (see 7.9)
Note 1 to entry: In combination with the symbol for the coating type (Z, ZF, ZA, ZM, AZ, AS), the nominal coating mass
is used as coating designation.
4 Classification and designation
4.1 Classification
4.1.1 General
The steels covered by this document are alloy quality steels (steels in accordance with Tables 1, 3 and 4) or
non-alloy quality steels (steels in accordance with Table 2) in accordance with EN 10020:2000.
4.1.2 Low carbon steels for cold forming
The steel grades are classified in accordance with their increasing suitability for cold forming as follows (see
Table 6):
DX51D: bending and profiling quality;
DX52D: drawing quality;
DX53D: deep drawing quality;
DX54D: special deep drawing quality;
DX55D: special deep drawing quality (only +AS);
DX56D: extra deep drawing quality;
DX57D: super deep drawing quality.
4.1.3 Steels for construction
The steel grades are classified in accordance with their increasing minimum proof strength R (see Table 7).
p0,2
4.1.4 Steels with high proof strength for cold forming
The steel grades are classified in accordance with their increasing minimum proof strength R (see Table 8).
p0,2
4.1.5 Multiphase steels for cold forming
The steel grades are classified in accordance with their increasing minimum tensile strength R (see Tables 9
m
and 10).
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4.2 Designation
4.2.1 Steel names
The steel names in accordance with this document are allocated in accordance with EN 10027-1.
4.2.2 Steel numbers
The steel numbers in accordance with this document are allocated in accordance with EN 10027-2.
5 Information to be supplied by the purchaser
5.1 Mandatory information
The following information shall be supplied by the purchaser at the time of enquiry and order:
a) quantity to be delivered;
b) type of product (strip, sheet, cut length);
c) number of the dimensional standard (EN 10143);
d) nominal dimensions and the tolerances on dimensions and shape and, if applicable, letters denoting
relevant special tolerances;
e) term "steel";
f) number of this document, i.e. EN 10346;
g) steel name or steel number and symbol for the type of hot-dip coating as given in Tables 1 to 4;
h) number designating the nominal mass of coating (e.g. 275 = 275 g/m² including both surfaces, see
Table 11);
i) letter denoting the coating finish (N or M, see 7.4.2 and Table 12);
j) letter denoting the surface quality (A, B or C, see 7.5 and Tables 12 to 14);
k) letter denoting the surface treatment (C, O, CO, P, PO or S, see 7.6).
EXAMPLE 1 sheet, delivered with dimensional tolerances in accordance with EN 10143 with nominal thickness of
0,80 mm, ordered with special thickness toleran
...
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