EN 10205

BRITISH STANDARD BS EN 10205:1992 Specification for Cold reduced blackplate in coil form for the production of tinplate or electrolytic chromium/chromium oxide coated steel The European Standard EN 10205:1991 has the status of a British Standard BS EN 10205:1992 This British Standard was published under the authority of the Standards Board and comes into effect on 28 February 1992 © BSI 12-1999 The following BSI references relate to the work on this standard: Committee reference ISM/29 Draft for comment 90/40867 DC ISBN 0 580 20400 6 Cooperating organizations The European Committee for Standardization, under whose supervision this European Standard was prepared, comprises the national standards organizations of the following Western European countries. Austria Oesterreichisches Normungsinstitut Belgium Institut belge de normalisation Denmark Dansk Standardiseringsraad Finland Suomen Standardisoimisliito, r.y. France Association française de normalisation Germany Deutsches Institut für Normung e.V. Greece Hellenic Organization for Standardization Iceland Technological Institute of Iceland Ireland National Standards Authority of Ireland Italy Ente Nazionale Italiano di Unificazione Luxembourg Inspection du Travail et des Mines Netherlands Nederlands Normalisatie-instituut Norway Norges Standardiseringsforbund Portugal Instituto Portuguès da Qualidade Spain Asociación Española de Normalización y Certificación Sweden Standardiseringskommissionen i Sverige Switzerland Association suisse de normalisation United Kingdom British Standards Institution Amendments issued since publication Amd. No. Date Comments BS EN 10205:1992 © BSI 12-1999 i Contents Page Cooperating organizations Inside front cover National foreword ii Foreword 2 Text of EN 10205 3 National appendix NA (informative) Inside back cover National appendix NB (informative) Inside back cover BS EN 10205:1992 ii © BSI 12-1999 National foreword This British Standard has been prepared under the direction of the Iron and Steel Standards Policy Committee and is the English language version of EN 10205 “Cold reduced blackplate in coil form for the production of tinplate or electrolytic chromium/chromium oxide coated steel” drawn up by ECISS (European Committee for Iron and Steel Standardization) and published by the European Committee for Standardization (CEN). National appendix NB gives details of European Standards quoted in this standard for which there is an identical or technically equivalent British Standard. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, the EN title page, pages 2 to 14, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM EN 10205 November 1991 UDC 669.146.99-41-122.2:669.268.7:620.1 Descriptors: Iron and steel products, cold rolled products, blackplate, tinplate, chromium plating, electrodeposited coatings, mechanical properties, dimensional tolerances, form tolerances, sampling, tests English version Cold reduced blackplate in coil form for the production of tinplate or electrolytic chromium/chromium oxide coated steel Fer noir laminé à froid, en bobine destiné à la fabrication de fer blanc ou de fer chromé électrolytique Kaltgewalztes Feinstblech in Rollen zur Herstellung von Weißblech oder von elektrolytisch spezialverchromtem Stahl This European Standard was approved by CEN on 1991-11-30. 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, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comité Européen de Normalisation Europäisches Komitee für Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels © CEN 1991 Copyright reserved to all CEN members Ref. No. EN 10205:1991 E EN 10205:1992 © BSI 12-19992 Foreword This European Standard was prepared by Technical Committee ECISS/TC26 “Blackplate and tinplate”. It was agreed by ECISS/TC26 at its meeting in November 1989 where the following countries were represented: Belgium, France, Germany, Italy, Netherlands, Norway and Spain. This European Standard EN 10205 was approved by CEN on 1991-10-07. According to the Common CEN/CENELEC Rules, the following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. Contents Page Foreword 2 1 Scope 3 2 Normative references 3 3 Definitions 3 4 Information to be supplied by the purchaser 5 5 Designation 5 6 Manufacturing features 6 7 Specific requirements 6 8 Mechanical properties 6 9 Tolerances on dimensions and shape 7 10 Joints within a coil 9 11 Sampling 9 12 Test methods 9 13 Retests 11 14 Dispatch and packaging 11 Annex A (normative) The springback test for routine determination of proof stress for double reduced material 13 Figure 1 — Edge camber of coils 8 Figure 2 — Joint overlap 10 Figure 3 — Location of test pieces 10 Table 1 — Hardness values for single reduced blackplate 7 Table 2 — Mechanical properties of double reduced blackplate 7 Table 3 — Rockwell HR15T values and their HR30Tm equivalents 12 EN 10205:1992 © BSI 12-1999 3 1 Scope This European Standard specifies requirements for single and double cold reduced blackplate in the form of coils which are intended for manufacturing tinplate or ECCS in accordance with EN 10203 or EN 10202. Single reduced blackplate is specified in nominal thicknesses that are multiples of 0,005 mm, from 0,17 mm up to and including 0,49 mm. Double reduced blackplate is specified in nominal thicknesses that are multiples of 0,005, from 0,14 mm up to and including 0,29 mm. This standard applies to coils in nominal minimum widths of 600 mm either with trimmed or untrimmed edges. 2 Normative references This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For undated references the latest edition of the publication referred to applies. EN 10109, Metallic materials — Hardness test — Part 1: Rockwell superficial test (Scales 15N, 30N, 45N, 15T, 30T and 45T)1). EN 10002-1, Metallic materials — Tensile testing — Part 1: Methods of test (at ambient temperatures). EN 10202, Cold reduced electrolytic chromium/chromium oxide coated steel. EN 10203, Cold reduced electrolytic tinplate. 3 Definitions For the purposes of this European Standard the following definitions apply. 3.1 blackplate cold reduced low carbon mild steel, normally oiled, for the production of tinplate or ECCS in accordance with EN 10202 or EN 10203 3.2 single cold reduced a term used to describe blackplate which has been reduced to the desired thickness in a cold reduction mill and subsequently annealed and temper rolled 3.3 double cold reduced a term used to describe blackplate which has had a second major reduction after annealing 3.4 batch (box) annealed (BA) annealed by the process in which the cold reduced strip is annealed in tight coil form, within a protective atmosphere, for a predetermined time-temperature cycle 3.5 continuously annealed (CA) annealed by the process in which cold reduced coils are unwound and annealed in strip form within a protective atmosphere 3.6 finish The appearance of the surface of blackplate, resulting from controlled preparation of the work rolls used for final stages of rolling. 3.6.1 shot blast finish a finish resulting from the use of temper mill work rolls that have been shot blasted 1) In preparation EN 10205:1992 4 © BSI 12-1999 3.6.2 smooth finish a finish resulting from the use of temper mill work rolls that have been ground to a high degree of polish. This finish is used for the production of bright finish tinplate 3.6.3 stone finish a finish characterized by a directional pattern, resulting from the use of final mill work rolls that have been ground to a lower degree of polish than those used for the smooth finish 3.7 coil a rolled flat strip product which is wound into regularly superimposed laps so as to form a coil with almost flat sides 3.8 bow 3.8.1 longitudinal (line) bow residual curvature in the strip remaining along the direction of rolling 3.8.2 transverse (cross) bow a mode of curvature in the strip such that the distances between its edges parallel to the rolling direction is less than the strip width 3.9 centre buckle (full centre) an intermittent vertical displacement or wave in the strip occurring other than at the edges 3.10 edge wave an intermittent vertical displacement occurring at the strip edge when the strip is laid on a flat surface. This parameter is only applicable to material supplied with trimmed edges 3.11 feather edge (transverse thickness profile) the variation in thickness, characterized by a reduction of thickness close to the edges, at right angles to the rolling direction. This parameter is only applicable to material supplied with trimmed edges 3.12 burr metal displaced beyond the plane of the surface of the strip by shearing action 3.13 rolling width the width of the strip perpendicular to the rolling direction 3.14 consignment a quantity of material of the same specification made available for despatch at the same time 3.15 pallet base platform on which a coil is placed to facilitate ready transportation 3.16 anvil effect the effect which a hard anvil can produce on the numerical hardness value obtained when a hardness test is performed on very thin material supported on such an anvil EN 10205:1992 © BSI 12-1999 5 4 Information to be supplied by the purchaser 4.1 General The following information shall be given on the enquiry and order to assist the manufacturer in supplying the correct material: a) the designation as given in clause 5; b) the quantity expressed as a mass basis; c) for single reduced blackplate the finish required, see 6.2.1; d) the orientation of the coils at delivery i.e. with the cores vertical or horizontal, see clause 14; e) whether the coil shall be supplied with the edges trimmed or not. NOTE Appropriate classifications are suitable for shaping operations such as stamping, drawing, folding, beading and bending and assembly work such as joint forming and welding. The end use should be borne in mind when the classification is selected. 4.2 Options In the event that the purchaser does not indicate his wish to implement any of the options included in this standard and does not specify his requirements at the time of the enquiry and order, the product shall be supplied on the following basis: a) for double reduced blackplate — with a stone surface finish (see 6.2.2); b) the location of each joint shall be indicated by a piece of non-rigid material and punched holes (see 10.3); c) coated with a suitable oil (see 6.3); d) with an internal diameter of 420 (+ 10, – 15) mm (see clause 14). 4.3 Additional information When ordering, the user shall supply all the necessary information concerning a) his production facilities which he anticipates will be appropriate to the ordered blackplate; b) the intended end use. 5 Designation 5.1 Single reduced blackplate For the purposes of this standard single reduced blackplate is designated in terms of a temper classification based on the Rockwell HR30Tm hardness values as given in Table 1. Single reduced material covered by this standard shall be designated by the following characteristics in the given sequence: a) a description of the material (i.e. blackplate coil); b) the number of this European Standard (EN 10205); c) the temper designation in accordance with Table 1; d) the type of annealing if required by the user (see 8.1); e) the type of finish (see 3.6); f) the dimensions of the thickness and width in mm; g) whether mill edge or trimmed. EXAMPLE: Blackplate EN 10205 – T61 – CA – stone – 0,20 × 800, trimmed. 5.2 Double reduced blackplate For the purposes of this standard double reduced blackplate is designated in terms of a system of mechanical property classifications based on the 0,2 % proof stress as given in Table 2. Double reduced material covered by this standard shall be designated by the following characteristics in the given order: a) a description of the material (i.e. blackplate coil); b) the number of this European Standard (EN 10205); c) the mechanical property designation (see Table 2); EN 10205:1992 6 © BSI 12-1999 d) the type of annealing, if required by the user (see 8.1); e) the dimensions of the thickness and width in mm; f) whether mill edge or trimmed. EXAMPLE: Blackplate EN 10205 – DR 620 – CA – 0,18 × 750, mill edge. 6 Manufacturing features 6.1 Manufacture The methods of manufacture of blackplate are the province of the manufacturer and are not specified in this standard. The purchaser shall be informed if any alteration is made to the method of manufacture that will affect the coating operation and the properties of the blackplate. NOTE It is recommended that the manufacturer supplies to the purchaser such details of the manufacturing process as may assist the purchaser in his efficient use of the blackplate. 6.2 Finish 6.2.1 Single reduced blackplate Single cold reduced blackplate can be supplied with either a smooth, stone or shot blast finish, and the finish required shall be specified at the time of order [see 4.1 c)]. 6.2.2 Double reduced blackplate Double cold reduced blackplate is usually supplied with a stone surface finish (see 3.6.3). 6.3 Oiling To avoid corrosion, blackplate shall be normally supplied with a sufficient layer of a suitable, non-mineral, protective oil. The oil shall be removed by an adequate inline cleaning process before any subsequent coating. If blackplate is required without an oil coating this shall be indicated at the time of order [see 4.2 c)]. NOTE If unoiled blackplate is supplied there is an increased risk of surface corrosion. 6.4 Defects The producer is expected to employ his normal quality control and line inspection procedures to ensure that the blackplate manufactured is in accordance with the requirements of this standard. However, the production of blackplate coils in continuous strip mill operations does not afford the opportunity for removal of all blackplate that does not comply with the requirements of this standard. If, when processing blackplate coil, the user (or his agent) encounters recurring defects which are incompatible with the end use [see 4.3 b)], it is essential — where practicable — that he stops processing the coil and advises the supplier. The user is expected to have adequate handling and roller levelling equipment and to take reasonable care during these operations. 7 Specific requirements Blackplate shall comply with the appropriate requirements of clauses 8 to 10. When tests are carried out to verify compliance with the requirements of clauses 8 and 9, samples shall be selected from consignments in accordance with clause 11. Coils shall be dispatched as described in clause 14. 8 Mechanical properties 8.1 General For the purposes of this standard single reduced blackplate is classified into temper grades based on Rockwell HR30Tm hardness values and double reduced blackplate classification is based on the 0,2 % proof stress properties and Rockwell HR30Tm hardness values. Other mechanical properties will significantly influence the performance of blackplate in processing and subsequent intended end use will vary depending on the steel type and the methods of casting, annealing and temper rolling employed. EN 10205:1992 © BSI 12-1999 7 NOTE By agreement, the type of annealing for blackplate, i.e. BA or CA (see 3.4 or 3.5) may be specified when ordering. 8.2 Single reduced blackplate The hardness value for single reduced blackplate shall be as given in Table 1 when tested as described in 12.2. 8.3 Double reduced blackplate When tested as described in 12.2 and 12.3 the mechanical properties shall be as given in Table 2. NOTE For routine testing the proof stress may be determined using the springback test as described in Annex A. However, in cases of dispute, the method given in 12.3 is used. Table 1 — Hardness values for single reduced blackplate Table 2 — Mechanical properties of double reduced blackplate 9 Tolerances on dimensions and shape 9.1 General Tolerances on dimensions (i.e. thickness and linear dimensions) and shape (i.e. edge camber, lateral weave) are specified in 9.2 to 9.5 together with appropriate methods of measurement. 9.2 Coil width The width of the coil shall be measured across each sample sheet, selected in accordance with clause 11, to the nearest 0,5 mm. The width shall be measured across the centre of the sample sheet, at right angles to the rolling direction, with the sample sheet lying on a flat surface. The measured width shall be not less than the ordered width and shall not exceed the ordered width by more than 3 mm for trimmed coil. 9.3 Coil thickness 9.3.1 General The transverse thickness profile shall be measured using the micrometer method described in 12.1.2. All other thicknesses shall be determined by the weighing method (see 12.1.1) or by direct measurement using the micrometer method (see 12.1.2). However, in cases of dispute and for all retests, except for transverse thickness profile, the weighing method shall be used. 9.3.2 Thickness of a coil The thickness of sample sheets shall not deviate from the nominal thickness of the coil by more than ± 8,5 %. Temper designation k 0,21 mm > 0,21 k 0,28 mm > 0,28 mm Nominal Range for sample average Nominal Range for sample average Nominal Range for sample average T50 T52 T57 T61 T65 53 max 53 58 62 65 ± 4 ± 4 ± 4 ± 4 52 max 52 57 61 65 ± 4 ± 4 ± 4 ± 4 51 max 51 56 60 64 ± 4 ± 4 ± 4 ± 4 Mechanical property designation Average 0,2 % proof stress Average Rockwell hardness HR30Tm a Nominal Permitted range sample average Nominal average Range for sample average DR 550 DR 620 DR 660 N/mm2 550 620 660 N/mm2 480 – 620 550 – 690 590 – 730 73 76 77 ± 3 ± 3 ± 3 a It is important to distinguish HR30Tm from HR30T, the former denoting that depressions on the under surface of the test piece are permitted (cf. Euronorm 109). EN 10205:1992 8 © BSI 12-1999 9.3.3 Average thickness of a consignment The average thickness of a consignment, determined by the weighing method described in 12.1.1, on the sample sheets selected in accordance with 11.1, shall not deviate from the ordered nominal thickness by mo