SIST EN 10327:2004
(Main)Continuously hot-dip coated strip and sheet of low carbon steels for cold forming - Technical delivery conditions
Continuously hot-dip coated strip and sheet of low carbon steels for cold forming - Technical delivery conditions
1.1 This European Standard specifies requirements for continuously hot-dip coated products made of low carbon steels for cold forming coated with zinc (Z), zinc-iron alloy (ZF), zinc-aluminium alloy (ZA), aluminium-zinc alloy (AZ) and aluminium-silicon alloy (AS) (see Table 1) with thicknesses of 0,35 mm to 3,0 mm unless otherwise agreed (see 1.2). The thickness is the final thickness of the delivered product after coating.
This European Standard applies to strip of all widths and to sheets cut from it (= 600 mm width) and cut lengths
(< 600 mm width).
1.2 If agreed at the time of enquiry and order, this European Standard may also be applied to continuously hot-dip coated flat products in thicknesses > 3,0 mm. In this case the mechanical property, adhesion of coating and surface condition requirements shall also be agreed at the time of enquiry and order.
1.3 The products covered by this European Standard are mainly used where cold formability and corrosion resistance are the most important factors. Corrosion resistance of the alloy is proportional to the coating thickness, hence to its mass (see also 7.3.2).
1.4 This European Standard is not applicable to:
· continuously hot-dip coated structural steel flat products (see prEN 10326);
· electrolytically zinc coated cold rolled steel flat products (see EN 10152);
· continuously organic coated (coil coated) steel flat products (see EN 10169-1, ENV 10169-2 and
EN 10169-3);
· continuously hot-dip coated strip and sheet of steels with higher yield strength for cold forming (see EN 10292).
Kontinuierlich schmelztauchveredeltes Band und Blech aus weichen Stählen zum Kaltumformen - Technische Lieferbedingungen
1.1 Dieses Dokument legt die Anforderungen an kontinuierlich schmelztauchveredelte Flacherzeugnisse aus weichen Stählen zum Kaltumformen mit Überzügen aus Zink (Z), Zink-Eisen-Legierung (ZF), Zink-Aluminium-Legierung (ZA), Aluminium-Zink-Legierung (AZ) und Aluminium-Silicium-Legierung (AS) (siehe Tabelle 1) in Dicken von 0,35 mm bis 3,0 mm fest, falls nicht anders vereinbart (siehe 1.2). Als Dicke gilt die Enddicke des gelieferten Erzeugnisses nach dem Schmelztauchveredeln.
Dieses Dokument gilt für Band aller Breiten sowie für daraus abgelängte Bleche (3 600 mm Breite) und Stäbe (< 600 mm Breite).
1.2 Nach Vereinbarung bei der Anfrage und Bestellung kann dieses Dokument auch auf kontinuierlich schmelztauchveredelte Flacherzeugnisse in Dicken > 3,0 mm angewendet werden. Die Anforderungen an die mechanischen Eigenschaften, die Haftung des Überzugs und die Oberflächenbeschaffenheit sind in diesem Fall ebenfalls bei der Anfrage und Bestellung zu vereinbaren.
1.3 Die Erzeugnisse nach diesem Dokument eignen sich für Verwendungszwecke, bei denen die Kaltumformbarkeit und die Korrosionsbeständigkeit von vorrangiger Bedeutung sind. Der durch den Überzug bewirkte Korrosionsschutz ist der Überzugsdicke und damit der Auflagenmasse proportional (siehe auch 7.3.2).
1.4 Dieses Dokument gilt nicht für
· kontinuierlich schmelztauchverzinkte Flacherzeugnisse aus Baustählen (siehe EN 10326);
· elektrolytisch verzinkte kaltgewalzte Flacherzeugnisse aus Stahl (siehe EN 10152);
· kontinuierlich organisch beschichtete (bandbeschichtete) Flacherzeugnisse aus Stahl (siehe EN 10169-1,
ENV 10169-2 und EN 10169-3);
· kontinuierlich schmelztauchveredeltes Band und Blech aus Stählen mit hoher Streckgrenze zum Kaltumformen (siehe EN 10292).
Bandes et tôles en acier doux revetues en continu par immersion a chaud pour formage a froid - Conditions techniques de livraison
1.1 Le présent document a pour objet de spécifier les exigences relatives aux produits en acier doux pour formage a froid revetus par immersion a chaud en continu de zinc (Z), d'alliage de zinc et de fer (ZF), d'alliage de zinc et d'aluminium (ZA), d'alliage d'aluminium et de zinc (AZ) et d'alliage d'aluminium et de silicium (AS) (voir Tableau 1), avec des épaisseurs allant de 0,35 mm a 3,0 mm sauf indication contraire (voir 1.2). L'épaisseur considérée est l'épaisseur finale du produit livré apres revetement.
Le présent document est applicable aux bandes de toutes largeurs ainsi qu'aux tôles (largeur 3 600 mm) et aux feuilles (largeur < 600 mm) qui y sont découpées.
1.2 Par accord lors de la commande, le présent document peut également etre utilisé pour les produits plats en acier galvanisés a chaud en continu d'épaisseur > 3,0 mm. Dans ce cas, les propriétés mécaniques et les caractéristiques d'adhérence du revetement et de finition doivent également faire l'objet d'un accord a la commande.
1.3 Les produits conformes au présent document sont principalement utilisés lorsque l'aptitude au formage et la résistance a la corrosion sont les facteurs primordiaux. La résistance du revetement a la corrosion est proportionnelle a la masse du revetement (voir aussi 7.3.2).
1.4 Le présent document ne s'applique pas :
- aux produits plats de bandes et tôles en acier de construction revetus par immersion a chaud en continu pour formage a froid (voir EN 10326) ;
- aux produits plats en acier, laminés a froid, revetus de zinc par voie électrolytique (voir EN 10152) ;
- aux produits plats en acier revetus en continu de matieres organiques (prélaqués) (voir EN 10169-1, ENV 10169-2 et EN 10169-3) ;
- bandes et tôles en acier a haute limite d'élasticité revetues en continu par immersion a chaud pour formage a froid (voir EN 10292).
Kontinuirno vroče prevlečeni trakovi in pločevine iz jekel z majhnim deležem ogljika za hladno oblikovanje – Tehnični dobavni pogoji
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Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Continuously hot-dip coated strip and sheet of low carbon steels for cold forming - Technical delivery conditionsBandes et tôles en acier doux revetues en continu par immersion a chaud pour formage a froid - Conditions techniques de livraisonKontinuierlich schmelztauchveredeltes Band und Blech aus weichen Stählen zum Kaltumformen - Technische Lieferbedingungen77.140.50SROL]GHONLFlat steel products and semi-productsICS:SIST EN 10327:2004enTa slovenski standard je istoveten z:EN 10327:200401-november-2004SIST EN 10327:2004SLOVENSKI
STANDARDSIST EN 10214:1997SIST EN 10215:1998SIST EN 10142:2001SIST EN 10154:20031DGRPHãþD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 10327
July 2004 ICS 77.140.50 Supersedes EN 10142:2000,EN 10154:2002,EN 10214:1995,and EN 10215:1995English version
Continuously hot-dip coated strip and sheet of low carbon steels for cold forming - Technical delivery conditions
Bandes et tôles en acier doux revêtues en continu par immersion à chaud pour formage à froid - Conditions techniques de livraison
Kontinuierlich schmelztauchveredeltes Band und Blech aus weichen Stählen zum Kaltumformen - Technische Lieferbedingungen This European Standard was approved by CEN on 23 April 2004.
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 Central Secretariat 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 Central Secretariat has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36
B-1050 Brussels © 2004 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 10327:2004: E
EN 10327:2004 (E) 2 Contents page Foreword.3 1 Scope.4 2 Normative references.4 3 Terms and definitions.5 4 Classification and designation.5 4.1 Classification.5 4.2 Designation.6 5 Information to be supplied by the purchaser.6 5.1 Mandatory information.6 5.2 Options.7 6 Manufacturing process.7 7 Requirements.8 7.1 Chemical composition.8 7.2 Mechanical properties.8 7.3 Coatings.10 7.4 Coating finish (see Tables 4 to 6).10 7.5 Surface quality.11 7.6 Surface treatment (surface protection).14 7.7 Freedom from coil breaks.15 7.8 Stretcher strains.15 7.9 Coating mass.16 7.10 Adhesion of coating.16 7.11 Surface condition.16 7.12 Tolerances on dimensions and shape.16 7.13 Suitability for further processing.16 8 Testing.17 8.1 General.17 8.2 Test units.17 8.3 Number of tests.17 8.4 Sampling.17 8.5 Test methods.18 8.6 Retests.19 9 Marking.19 10 Packing.19 11 Storage and transportation.19 12 Disputes.19 Annex A (normative)
Reference method for determination of the zinc, zinc-aluminium and aluminium-zinc coating mass.20 Annex B (normative)
Reference method for determination of the aluminium-silicon coating mass.21 Annex C (normative)
Method for determination of the mass of the Al-Fe-Si alloy layer.22 Bibliography.23
EN 10327:2004 (E) 3 Foreword This document (EN 10327:2004) has been prepared by Technical Committee ECISS/TC 27 “Surface coated flat products – Qualities, dimensions, tolerances and specific tests”, the secretariat of which is held by DIN. 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 2005, and conflicting national standards shall be withdrawn at the latest by January 2005. This European Standard supersedes EN 10142:2000 and, together with EN 10326, it also supersedes EN 10154:2002, EN 10214:1995 and EN 10215:1995. This document includes a Bibliography. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EN 10327:2004 (E) 4 1 Scope 1.1
This document specifies requirements for continuously hot-dip coated products made of low carbon steels for cold forming coated with zinc (Z), zinc-iron alloy (ZF), zinc-aluminium alloy (ZA), aluminium-zinc alloy (AZ) and aluminium-silicon alloy (AS) (see Table 1) with thicknesses of 0,35 mm to 3,0 mm unless otherwise agreed (see 1.2). 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). 1.2 If agreed at the time of enquiry and order, this document may also be applied to continuously hot-dip coated flat products in thicknesses > 3,0 mm. In this case the mechanical property, adhesion of coating and surface condition requirements shall also be agreed at the time of enquiry and order. 1.3 The products covered by this document are mainly used where cold formability and corrosion resistance are the most important factors. Corrosion resistance of the alloy is proportional to the coating thickness, hence to its mass (see also 7.3.2). 1.4
This document is not applicable to: • continuously hot-dip coated structural steel flat products (see EN 10326); • electrolytically zinc coated cold rolled steel flat products (see EN 10152); • continuously organic coated (coil coated) steel flat products (see EN 10169-1, ENV 10169-2 and
EN 10169-3); • continuously hot-dip coated strip and sheet of steels with higher yield strength for cold forming (see EN 10292). 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments). EN 10002-1, Metallic materials – Tensile testing – Part 1: Method of test at ambient temperature. EN 10020:2000, Definition and classification of grades of steel. EN 10021:1993, General technical delivery requirements for steel and steel products. EN 10027-1, Designation systems for steels – Part 1: Steel names, principal symbols. EN 10027-2, Designation systems for steels – Part 2: Numerical system. EN 10079:1992, Definition of steel products. EN 10143, Continuously hot-dip metal coated steel sheet and strip - Tolerances on dimensions and shape. EN 10204:1991, Metallic products – Types of inspection documents. 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. CR 10260, Designation systems for steel – Additional symbols.
EN 10327:2004 (E) 5 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 10020:2000, EN 10021:1993, EN 10079:1992 and EN 10204:1991 and the following apply. NOTE 1 General guidelines for the protection of iron and steel can be found in EN ISO 14713. NOTE 2 In the present cases, strip is continuously hot-dip coated in a bath the composition of which is given in 3.1 to 3.4. 3.1 hot-dip zinc coating (Z) application of a zinc coating by immersing the prepared products in a molten bath containing a zinc content of at least 99 % (see also 7.4.2) 3.2 hot-dip zinc-iron coating (ZF) application of a zinc coating by immersing the prepared products in a molten bath containing a zinc content of at least 99 % ; subsequent annealing 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 products in a molten bath which is composed of zinc and approximately 5 % aluminium 3.4 hot-dip aluminium-zinc alloy coating (AZ) application of an aluminium-zinc coating by immersing the prepared products in a molten bath which is composed of 55 % aluminium, 1,6 % silicon and the balance zinc 3.5 hot-dip aluminium-silicon alloy coating (AS) application of an aluminium-silicon coating by immersing the prepared products in a molten bath which is composed of aluminium and 8 % to 11 % silicon 3.6 coating mass total mass of coating including both surfaces of the product (expressed in grams per square metre) 4 Classification and designation 4.1 Classification In accordance with EN 10020 the steel grades covered by this document are alloy quality steels. They are classified in accordance with their increasing suitability for cold forming as follows (see Table 1): DX51D: bending and profiling quality; DX52D: drawing quality; DX53D: deep drawing quality; DX54D: special deep drawing quality; DX55D: special deep drawing quality, (only +AS), heat resistance up to 800 °C; DX56D: extra deep drawing quality; DX57D: super deep drawing quality.
EN 10327:2004 (E) 6 4.2 Designation 4.2.1 Steel names For the steel grades covered by this document, the steel names as given in Table 1 are allocated in accordance with EN 10027-1 and CR 10260. 4.2.3 Steel numbers For the steel grades covered by this document, the steel numbers as given in Table 1 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 (EN 10327); g) steel name or steel number and symbol for the type of hot-dip coating as given in Table 1; h) number designating the nominal mass of coating (e.g. 275 = 275 g/m² including both surfaces, see
Tables 3 to 6); i) letter denoting the coating finish (N, M or R, see 7.3 and Tables 4 and 5); j) letter denoting the surface quality (A, B or C, see 7.5); k) letter denoting the surface treatment (C, O, CO, S, P or PO, 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 tolerances (S), nominal width 1200 mm, ordered with special width tolerances (S), nominal length 2500 mm, ordered with special flatness tolerances (FS), made of steel DX53D+ZF (1.0355+ZF) in accordance with EN 10327, coating mass 100 g/m² (100), coating finish R, surface quality B, surface treatment oiled (O):
1 sheet EN 10143-0,80Sx1200Sx2500FS
steel EN 10327-DX53D+ZF100-R-B-O or:
1 sheet EN 10143-0,80Sx1200Sx2500FS
steel EN 10327-1.0355+ZF100-R-B-O
EN 10327:2004 (E) 7 5.2 Options A number of options are specified in this document and listed below. lf the purchaser does not indicate his wish to implement one of these options, the products shall be supplied in accordance with the basis specification of this document (see 5.1). a) delivery of products in thicknesses > 3 mm (see 1.2); b) verification of the product analysis (see 7.1.2); c) products supplied suitable for the manufacture of a specific part (see 7.2.2); d) coating masses different from those of Tables 3 to 5 and/or special requirements for different coating masses on each surface (see 7.3.2); e) products with pronounced spangle (see 7.4.2.1 or 7.4.5); f) special requirements for a maximum Al-Fe-Si alloy layer mass occuring during hot-dip aluminium-silicon coating (see 7.4.6); g) requirement for special applications on bright appearance for hot-dip aluminium-silicon coated products (type B surface, see NOTE to 7.5.3); h) type of S coating (see 7.6.5); i) products supplied free from coil breaks (see 7.7); j) products supplied free from stretcher strains when cold forming (see 7.8.2); k) special requirements for a maximum or minimum value for the coating mass per product surface (see 7.9.2); l) notification of which surface has been inspected (see 7.10.1); m) testing for compliance with the requirements of this document (see 8.1.1 and 8.1.2); n) supply of an inspection document and type of document (see 8.1.2); o) marking desired by branding of the products (see 9.2); p) requirement for packing (see Clause 10). 6 Manufacturing process The processes used in steelmaking and manufacture of the products are left to the discretion of the manufacturer.
EN 10327:2004 (E) 8 7 Requirements 7.1 Chemical composition 7.1.1 The chemical composition according to the cast analysis shall be as specified in Table 1. 7.1.2 If a product analysis is agreed at the time of enquiry and order, the permitted deviations from the cast analysis given in Table 1 shall meet the requirements in Table 2. 7.2 Mechanical properties 7.2.1 The products shall be supplied on the basis of the mechanical property requirements in Table 1. 7.2.2 lf so agreed at the time of enquiry and order, products specified in Table 1, except those made of steel grade DX51D, may be supplied with suitability for manufacturing a specific part. In this case the values given in Table 1 do not apply. The reject tolerances arising when the material is processed shall not exceed a specific proportion to be agreed at the time of enquiry and order. 7.2.3 If ordered in accordance with 7.2.1, the mechanical property values in Table 1 apply for the following periods commencing from the date on which the products are made available, unless otherwise agreed at the time of enquiry and order: 1 month for steel grades DX51 D, DX52D coated in accordance with Table 1; 6 months for steel grades DX53D, DX54D, DX55D, DX56D and DX57D coated in accordance with Table 1. 7.2.4 The tensile test values apply to transverse test pieces and are related to the test piece cross section without coating.
EN 10327:2004 (E) 9 Table 1 — Steel grades and mechanical properties (transverse test pieces) Designation Chemical composition
% by mass
max. Strain hardening exponent n90
min. Steel grade Symbols for the types of hot-dip coating C Si Mn P S Ti Yield strength
Re a MPa *
Tensile strength Rm MPa *
ElongationA80 b % min. Plastic strain ratior90
min.
DX51D 1.0226 +Z,+ZF,+ZA,+AZ,+AS - 270 to 500 22 - - DX52D 1.0350 +Z,+ZF,+ZA,+AZ,+AS 140 to 300 c 270 to 420 26 - - DX53D 1.0355 +Z,+ZF,+ZA,+AZ,+AS 140 to 260 270 to 380 30 - - DX54D 1.0306 +Z,+ZA 120 to 220 260 to 350 36 1,6 0,18 DX54D 1.0306 +ZF 120 to 220 260 to 350 34 1,4 0,18 DX54D 1.0306 +AZ 120 to 220 260 to 350 36 - - DX54D 1.0306 +AS 120 to 220 260 to 350 34 1,4 d,e 0,18 e DX55D 1.0309 +AS 140 to 240 270 to 370 30 - - DX56D 1.0322 +Z,+ZA 120 to 180 260 to 350 39 1,9 d 0,21 DX56D 1.0322 +ZF 120 to 180 260 to 350 37 1,7 d,e 0,20 e DX56D 1.0322 +AS 120 to 180 260 to 350 39 1,7 d,e 0,20 e DX57D 1.0853 +Z, +ZA 120 to 170 260 to 350 41 2,1 d 0,22 DX57D 1.0853 +ZF 120 to 170 260 to 350 39 1,9 d,e 0,21 e DX57D 1.0853 +AS 0,12 0,500,60 0,10 0,045 0,30 120 to 170 260 to 350 41 1,9 d,e 0,21 e *
1 MPa = 1 N/mm² a
If the yield point is not pronounced, the values apply to the 0,2 %-proof strength (Rp0,2); if the yield strength is pronounced, the values apply to the lower yield point (Rel). b
For product thicknesses 0,50 mm < t ≤ 0,70 mm (including coating) the minimum elongation values (A80) shall be reduced by 2 units. For t ≤ 0,50 mm this reduction shall be 4 units. c
This value applies to skin passed products only (surface qualities B and C). d
For t > 1,5 mm, the r90-value shall be reduced by 0,2. e
For t ≤ 0,70 mm, the r90-value shall be reduced by 0,2 and the n90-value shall be reduced by 0,01.
EN 10327:2004 (E) 10 Table 2 — Permissible deviations of the product analysis from specified limits on cast analysis given in Table 1 Element Specified limit of the cast analysis in Table 1 % by mass Permissible deviation of the product analysis % by mass C 0,12 + 0,02 Si 0,50 + 0,03 Mn 0,60 + 0,10 P 0,10 + 0,01 S 0,045 + 0,005 TI 0,30 + 0,01 7.3 Coatings 7.3.1 The products shall be supplied with coatings of zinc (Z), zinc-iron-alloy (ZF), zinc-aluminium-alloy (ZA), aluminium-zinc-alloy (AZ) and aluminium-silicon-alloy (AS) are given in Tables 3 to 6. 7.3.2 The available coating masses are given in Table 3. Deviating coating masses and/or different coating masses on each surface may be supplied if agreed at the time of enquiry and order. Thicker coatings may limit the formability and weldability of the products. Therefore, the forming and weldability requirements shall be taken into account when ordering the coating mass. The two surfaces may have a different appearance as a result of the manufacturing process. 7.4 Coating finish (see Tables 4 to 6) 7.4.1 General Depending on the coating conditions, crystals of different sizes and brightness arise. The quality of the coating is not affected by this. 7.4.2 Zinc coated products (Z) 7.4.2.1 Normal finish (N) The finish is obtained when the zinc coating is left to solidify normally. Either no spangle or zinc crystals of different sizes and brightness appear depending on the galvanizing conditions. The quality of the coating is not affected by this. lf a pronounced spangle is desired, this shall be indicated specially at the time of enquiry and order. 7.4.2.2 Minimized spangle (M) The finish is obtained by influencing the solidification process in a specific way. The surface will have reduced spangles, in some cases, not visible to the unaided eye. The finish may be ordered if the normal spangle (see 7.4.1.1) does not satisfy the surface appearance requirements. 7.4.3 Zinc-iron alloy coated products (ZF) The regular zinc-iron alloy coating (R) results from heat treatment in which iron diffuses through the zinc. The surface has a uniform matt grey appearance.
EN 10327:2004 (E) 11 7.4.4 Zinc-aluminium coated products (ZA) The coating finish has a metallic lustre, that is the result of unrestricted growth of the zinc-aluminium crystals during normal solidification. Crystals of different sizes and brightness may appear depending on the manufacturing conditions. The quality of the coating is not affected by this. 7.4.5 Aluminium-zinc coated products (AZ) The products are supplied with a normal spangle. Normal spangle is a coating finish, having a metallic lustre, that is the result of unrestricted growth of the aluminium-zinc crystals during normal solidification. lf a pronounced spangle is desired, this shall be indicated specially at the time of enquiry and order. 7.4.6 Aluminium-silicon coated products (AS) Deviating from other hot-dip coated products, a relatively pronounced (Al-Fe-Si) alloy layer is formed over the base material during hot-dip coating. This shall be taken into account for further processing. If a maximum value for the mass of this layer is required, this shall be especially agreed upon at the time of enquiry and order. The test method is described in Annex C. 7.5 Surface quality 7.5.1 General The products may be supplied with one of the surface qualities described in 7.5.2 to 7.5.4 (see Tables 4 to 6). 7.5.2 As coated surface (A) Imperfections such as pimples, marks, scratches, pits, variations in surface appearance, dark spots, stripe marks and light passivation stains are permissible. Stretch levelling breaks or run-off marks may appear. Coil breaks and stretcher strains may appear as well. 7.5.3 Improved surface (B) Surface quality B is obtained by skin passing. With this surface quality, small imperfections such as stretch levelling breaks, skin pass marks, slight scratches, surface structure, run-off marks and light passivation stains are permissible. NOTE For special applications and by agreement between the producer and the user, hot-dip aluminium-silicon coated products (AS) may be supplied with a bright appearance. In that case the surface is of type "B". 7.5.4 Best quality surface (C) Surface quality C is obtained by skin passing. The controlled surface shall make it possible to apply a uniform high-class paint finish. The other surface shall at least have the characteristics of surface quality B (see 7.5.3).
EN 10327:2004 (E) 12 Table 3 — Available coating masses Minimum coating mass a, total both surfaces g/m2 Theoretical guidance values for coating thickness per surface in the single spot test
µm Coating designation Triple spot test Single spot test Typical value b
Range c Density
g/cm3 Zinc coating masses (Z) Z100 100 85 7 5 to 12 Z140 140 120 10 7 to 15 Z200 200 170 14 10 to 20 Z225 225 195 16 11 to 22 Z275 275 235 20 15 to 27 Z350 350 300 25 19 to 33 Z450 450 385 32 24 to 42 Z600 600 510 42 32 to 55
7,1 Zinc-iron coating masses (ZF) ZF100 100 85 7 5 to 12 ZF120 120 100 8 6 to 13 ZF140 140 120 10 7 to 15 7,1 Zinc-aluminium alloy coating masses (ZA) ZA095 95 80 7 5 to 12 ZA130 130 110 10 7 to 15 ZA185 185 155 14 10 to 20 ZA200 200 170 15 11 to 21 ZA255 255 215 20 15 to 27 ZA300 300 255 23 17 to 31
6,9 Aluminium-zinc alloy coating masses (AZ) AZ100 100 85 13 9
to 19 AZ150 150 130 20 15 to 27 AZ185 185 160 25 19 to 33 3,8 Aluminium-silicon alloy coating masses (AS) AS060 60 45 8 6 to 13 AS080 80 60 14 10 to 20 AS100 100 75 17 12 to 23 AS120 120 90 20 15 to 27 AS150 150 115 25 19 to 33
3,0 a See 7.9. b Coating thicknesses can be calculated from the coating masses (see 7.9.1). c The user can expect, that these limiting values are obtained on the upper surface and on the
reverse surface.
EN 10327:2004 (E) 13 Table 4 — Available coatings, finishes and surface qualities for zinc coatings (Z) Steel grade Coating finish N M Surface qualities a Steel name Steel number
Coating designation a A A B C Z100 X X X X Z140 X X X X Z200 X X X X (Z225) (X) (X) (X) (X) Z275 X X X X Z350 X X – – (Z450) (X) (X) – –
DX51D+Z
1.0226 (Z600) (X) (X) – – Z100 X X X X Z140 X X X X Z200 X X X X (Z225) (X) (X) (X) (X)
DX52D+Z
1.0350 Z275 X X X X Z100 X X X X Z140 X X X X Z200 X X X X (Z225) (X) (X) (X) (X)
DX53D+Z DX54D+Z DX56D+Z DX57D+Z
1.0355 1.0306 1.0322 1.0853
(Z275) (X) (X) (X) (X) a The coatings and surface qualities given in brackets are available on agreement.
Table 5 — Available coatings, finishes and surface qualities for zinc-iron alloy coatings (ZF) Coating finish R Surface qualities a Steel grades Coating designation aA B C ZF100 X X X ZF120 X X X All grades (+ZF) (see Table 1) (ZF140) (X) (X) (X) a The coatings and surface qualities given in brackets are available on agreement.
EN 10327:2004 (E) 14 Table 6 — Available coatings, finishes and surface qualities for zinc-aluminium coatings (ZA), aluminium-zinc coatings (AZ) and aluminium-silicon coatings (AS) Surface qualities a Steel grade Coating designation A B C Zinc-aluminium coatings (ZA) ZA095 X X X ZA130 X X X ZA185 X X X ZA200 X X X ZA255 X X X
All grades (+ZA), except DX55D (see Table 1) ZA300 X – – Aluminium-zinc coatings (AZ) AZ100 X X X AZ150 X X X
DX51D, DX52D DX53D, DX54D (+AZ) AZ185 X X X Aluminium-silicon coatings (AS) AS060 X X X AS080 X X X AS100 X X X AS120 X X (X)
All grades (+AS) (see Table 1) AS150 X (X) (X) a The surface qualities given in brackets are available on agreement.
7.6 Surface treatment (surface protection) 7.6.1 General Hot-dip coated flat products receive one of the following surface treatments at the producer's plant
(see 7.6.2 to 7.6.7): • chemical passivation
C • oiling
O • chemical passivation and oiling
CO • sealed
S • phosphated
P • phosphated and oiled
PO
EN 10327:2004 (E) 15 Surface treatment serves, among other things, as a temporary corrosion protection during storage and transportation. The period of protection afforded depends on the atmospheric and storage conditions. Hot-dip coated flat products are only supplied without surface treatment (untreated (U)) if expressively desired by the purchaser on his own responsibility. In this case, there is increased risk of formation of corrosion products on the surface during storage and transportation. 7.6.2 Chemical passivation (C) Chemical passivation
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