BS-EN-10326-2004.pdf

BRITISH STANDARD BS EN 10326:2004 Continuously hot-dip coated strip and sheet of structural steels Technical delivery conditions The European Standard EN 10326:2004 has the status of a British Standard ICS 77.140.50; 77.140.10 ? BS EN 10326:2004 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 14 July 2004 © BSI 14 July 2004 ISBN 0 580 44084 2 National foreword This British Standard is the official English language version of EN 10326:2004. It supersedes BS EN 10147:2000, and together with BS EN 10327, supersedes BS EN 10154:2002, BS EN 10214:1995 and BS EN 10215:1995, which are withdrawn. The UK participation in its preparation was entrusted to Technical Committee ISE/10, Flat rolled steel products, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 20, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. DateComments EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM EN 10326 July 2004 ICS 77.140.50; 77.140.10 Supersedes EN 10147:2000, EN 10154:2002, EN 10214:1995, and EN 10215:1995 English version Continuously hot-dip coated strip and sheet of structural steels - Technical delivery conditions Bandes et tôles en aciers de construction doux revêtues en continu par immersion à chaud - Conditions techniques de livraison Kontinuierlich schmelztauchveredeltes Band und Blech aus Baustählen - 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 10326:2004: E EN 10326:2004 (E) 2 Contents page Foreword3 1 Scope 4 2 Normative references4 3 Terms and definitions .5 4 Classification and designation.5 4.1 Classification5 4.2 Designation 5 5 Information to be supplied by the purchaser .6 5.1 Mandatory information6 5.2 Options .6 6 Manufacturing process .7 7 Requirements.7 7.1 Chemical composition 7 7.2 Mechanical properties.8 7.3 Coatings9 7.4 Coating finish (see Tables 4 to 6).10 7.5 Surface quality.10 7.6 Surface treatment (surface protection) .12 7.7 Freedom from coil breaks.13 7.8 Coating mass .13 7.9 Adhesion of coating 13 7.10 Surface condition.13 7.11 Tolerances on dimensions and shape 14 7.12 Suitability for further processing.14 8 Testing14 8.1 General14 8.2 Test units14 8.3 Number of tests14 8.4 Sampling.14 8.5 Test methods15 8.6 Retests15 9 Marking.16 10 Packing .16 11 Storage and transportation.16 12 Disputes16 Annex A (normative) Reference method for determination of the zinc, zinc-aluminium and aluminium-zinc coating mass.17 Annex B (normative) Reference method for determination of the aluminium-silicon coating mass 18 Annex C (normative) Method for determination of the mass of the Al-Fe-Si alloy layer.19 Bibliography20 EN 10326:2004 (E) 3 Foreword This document (EN 10326:2004) 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 document supersedes EN 10147:2000 and, together with EN 10327, 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 10326:2004 (E) 4 1 Scope 1.1 This document specifies requirements for continuously hot-dip coated products made of structural steels 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 from 0,35 mm up 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 ( 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 minimum yield strength 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). NOTE +ZF coated products should not be used without additional organic coating. 1.4 This document is not applicable to: continuously hot-dip coated flat products of low-carbon steel strip and sheet for cold forming (see EN 10327); electrolytic galvanized cold rolled steel flat products (see EN 10152); continuously organic coated (coil coated) flat steel 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) applies. 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. CR 10260, Designation systems for steel - Additional symbols. EN 10326:2004 (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 standard are non-alloy quality steels. They are classified in accordance with their increasing minimum yield strength (Rp0,2) (see Table 1). 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. EN 10326:2004 (E) 6 4.2.2 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 10326); 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 7.4 and Tables 4 and 5); j) letter denoting the surface quality (A, B or C, see 7.5 and Tables 4 to 6); k) letter denoting the surface treatment (C, O, CO and 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 tolerances (S), nominal width 1 200 mm, ordered with special width tolerances (S), nominal length 2 500 mm, ordered with special flatness tolerances (FS), made of steel S320GD+Z (1.0250+Z) in accordance with EN 10326, coating mass 275 g/m² (275), coating finish M, surface quality B, chemically passivated (C): 1 sheet EN 10143-0,80Sx1200Sx2500FS steel EN 10326-S320GD+Z275-M-B-C or: 1 sheet EN 10143-0,80Sx1200Sx2500FS steel EN 10326-1.0250+Z275-M-B-C 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 (see 5.1). a) delivery of products in thicknesses 3 mm (see 1.2); b) verification of the product analysis (see 7.1.2); EN 10326:2004 (E) 7 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 occurring 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) special requirements for a maximum or minimum value for the coating mass per product surface (see 7.8.2); k) notification of which surface has been inspected (see 7.10.1); l) testing for compliance with the requirements of this document (see 8.1.1 and 8.1.2); m) supply of an inspection document and type of document (see 8.1.2); n) marking desired by branding of the products (see 9.2); o) 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. 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 deviations from the cast analysis given in Table 1 shall meet the requirements in Table 2. EN 10326:2004 (E) 8 Table 1 Steel grades and mechanical properties (longitudinal test pieces) Designation Chemical composition % by mass max. Mechanical properties Steel grade Steel name Steel number Symbols for the types of hot-dip coating C Si Mn P S 0,2 %-proof strength Rp0,2 a MPa * min. Tensile strength Rm b MPa * min. Elongation A80 c % min. S220GD 1.0241 +Z,+ZF,+ZA,+AZ 220 300 20 S250GD 1.0242 +Z,+ZF,+ZA,+AZ,+AS 250 330 19 S280GD 1.0244 +Z,+ZF,+ZA,+AZ,+AS 280 360 18 S320GD 1.0250 +Z,+ZF,+ZA,+AZ,+AS 320 390 17 S350GD 1.0529 +Z,+ZF,+ZA,+AZ,+AS 350 420 16 S550GD 1.0531 +Z,+ZF,+ZA,+AZ 0,20 0,60 1,70 0,10 0,045 550 560 - * 1MPa = 1 N/mm2. a If the yield point is pronounced, the values appl