1、- o m 5 o U E : : .i i C a: . a 2 e C - .f E C C C a f C 3 f T a T E I a I E : T C L 6 Specifications for zinc and zinc alloy rolled flat products for building English version of DIN EN 988 DIN EN 988 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 988 June 1996 ICs 77.120.60; 77.140.90 Descrip
2、tors: Building construction, flats, zinc. English version Zinc and zinc alloys Specifications for rolled flat products for building Zinc et alliages de zinc; spcifications pour produits lamins plats pour le btiment Zink und Zinklegierungen; Anforderungen an gewalzte Flacherzeugnisse fr das Bauwesen
3、This European Standard was approved by GEN on 1996-03-07. CEN members are bound to comply with the CENKENELEC 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 reference
4、s 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 i
5、ts 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, Switz
6、erland, and the United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels O 1996. CEN - All rights of exploitation in any form and by any means reserved worldwide for CEN national
7、members. Ref. No. EN 988: 1996 E Page 2 EN 988 : 1996 Contents Page Foreword . 3 1 Scope 4 2 Normative references . 4 3 Definitions . 4 3.1 flatproduct 4 3.2 strip . 4 3.3 coil 5 3.4 slitcoil . 5 3.5 sheet 5 3.6 cutlength . 5 4 Requirements 5 4.1 Manufacturing 5 4.2 Chemical composition . 5 4.3 Mech
8、anical properties . 5 4.4 Other requirements 6 5 Dimensions and tolerances . 6 5.1 Thickness . 6 5.2 Width 6 5.3 Length . 6 5.4 Lateral curvature 6 5.5 Flatness 6 6 Sampling and test methods . 7 6.1 Sampling 7 6.2 Test method for chemical composition . 7 6.3 Test methods for mechanical properties 7
9、6.4 Test methods for shape characteristics 8 7 Inspection documents . 8 8 Designation 9 9 Marking. labelling . packaging 9 9.1 Marking and labelling . 9 9.2 Packaging . 10 10 Ordering information 10 Figure 1: Lateral curvature 10 Figure 2: Transverse curvature . 11 Figure 3: Longitudinal curvature 1
10、1 Figure 4: Buckles 11 Figure5:Edgewaves . 12 Annex A (informative) Physical properties 13 Annex B (informative) Calculation of mass 13 Page 3 EN 988 : 1996 Foreword This European Standard has been prepared by Technical Committee CENTTC 209 “Zinc and zinc alloys“, the secretariat of which is held by
11、 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 December 1996, and conflicting national standards shall be withdrawn at the latest by December 1996. This standard defines product requireme
12、nts, derived from performance requirements established for various applications in building, and is supported by separate standards for specific and common test methods in the framework of CENiTC 209/SC 3. Annex A (informative) gives information on the physical properties of rolled zinc-copper-titan
13、ium products. Annex B (informative) gives guidance to the user in calculating masses of the product for a range of thickness. According to CENKENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium,
14、 Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Page 4 EN 988 : 1996 1 Scope This European Standard specifies requirements for rolled flat products for building purposes made from zinc-
15、copper-titanium alloy, in the form of strip, sheet or cut length. It covers products in the range 0,6 mm up to and including 1 ,O mm thickness and from 100 mm up to and including 1 O00 mm width. This standard does not cover formed or shaped products or products prefabricated by any means other than
16、cutting to size. NOTE: By agreement between the purchaser and the supplier at the time of ordering this standard or parts of this standard can be applied on other thicknesses or widths of rolled flat products made from zinc-copper-titanium alloy. 2 Normative references This European Standard incorpo
17、rates, 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 dated references, subsequent amendments to or revisions of any of these publications apply to this Europ
18、ean Standard only when incorporated in it by amendment or revision. For undated references, the latest edition of the publication referred to applies. EN 1179 Zinc and zinc alloys - Primary zinc EN 10002-1 : 1990 Metallic materials - Tensile testing - Part 1 : Method of test (at ambient temperature)
19、 EN 10204 Metallic products - Types of inspection documents prEN 12019 Zinc and zinc alloys - Optical emission spectrometric analysis IS0 7438 : 1985 Metallic materials - Bend test 3 Definitions For the purposes of this standard, the following definitions apply: 3.1 flat product Product manufactured
20、 by rolling, having a rectangular cross section, the width being much greater than the thickness and the nominal thickness being the same throughout its length. 3.2 strip Flat product which after final rolling, and/or treatment if any, is wound to form a coil. No distinction is made between strip ro
21、lled to final width or strip slit from a wider strip. Page 5 EN 988 : 1996 Cu Ti Al min. 0.08 min. 0.06 - max. 1.0 max. 0,2 max. 0,015 3.3 coil Zn) Remainder Delivery form of strip not less than 600 mm in width, wound in regularly superimposed laps. 3.4 slit coil Delivery form of strip less than 600
22、 mm in width, wound in regularly superimposed laps, obtained by slitting a coil. 3.5 sheet Rectangular or square flat product not less than 600 mm in width delivered flat and cut from strip. 3.6 cut length Rectangular or square flat product less than 600 mm in width delivered flat and cut from strip
23、 or sheet. 4 Requirements 4.1 Manufacturing Zinc-copper-titanium alloy shall be made from zinc grade Z1 conforming to EN 1179, that is 99,995 % minimum zinc content, with addition of alloying elements. The flat product shall be made either from casting in slabs or by continous casting, but either of
24、 these shall subsequently be rolled to produce the coil. 4.2 Chemical composition The alloy composition shall conform to the requirements given in table 1. The chemical composition shall be determined in accordance with 6.1 and 6.2. Table 1: Chemical composition 4.3 Mechanical propenies The product
25、shall conform to the requirements given in table 2. The tests shall be carried out in accordance with 6.1 and 6.3. Page 6 EN 988 : 1996 0,246 proof strength, non-proportional extension 40.2 N/mm2 min. 1 O0 Percentage elongation after fracture in creep test Percentage total fracture Bend test Tensile
26、 strength elongation at Rm 4mm N/mm2 YO 96 min. min. mar. 150 35 o, 1 no cracks on fold 4.4 Other requirements The surface shall be smooth, free from blisters, cracks, deep striations other than usual rolling marks. Any surface marks shall not affect any kind of normal mechanical processing. NOTE: S
27、light discolouration, white rust, grease or oiling spots are acceptable since they fade when weathering patina forms, without affecting mechanical or physical properties of the product. Special decorative requirements such as preweathered or organic coated surfaces shall be specified at the time of
28、order and agreed between the purchaser and the supplier. 5 Dimensions and tolerances 5.1 Thickness The maximum deviation from the ordered nominal thickness, when measured at least 30 mm from the edge of the strip or sheet shall not exceed *0,03 mm. NOTE: Sheet and strip are normally supplied in the
29、following preferred nominal thicknesses: 0,60 mm; 0.65 mm; 0,70 mm; 0.80 mm; 1.00 mrn. 5.2 Width The maximum deviation from the ordered nominal width shall not exceed + mm. NOTE: Minimum nominal width is 100 mm, and maximum 1 O00 mm. 5.3 Length The maximum deviation from the ordered nominal length o
30、f sheet or cut length shall not exceed Ao mm. NOTE: Preferred lengths are 2 O00 mm and 3 O00 mm. 5.4 Lateral curvature Deviation from straightness, dimension d in figure 1, shall not exceed 1,5 mmlm when tested in accordance with 6.4.2. 5.5 Flatness Deviation from flatness, dimension d in figures 2
31、to 5, shall not exceed 2 mm when tested in accordance with 6.4.3. Page 7 EN 988 : 1996 6 Sampling and test methods 6.1 Sampling 6.1.1 Test units For the determination of the chemical composition, the test unit shall consist of one melt of the alloy in the furnace. For the determination of the mechan
32、ical or shape characteristics, the test unit shall consist of one coil rolled to final thickness per melt. 6.1.2 Test samples For the determination of the chemical composition, one test sample shall be taken during the casting of the melt. For the determination of the mechanical or shape characteris
33、tics of coil or slit coil, one test sample shall be taken at the beginning or end of one of the products, with the sample length not exceeding 2 m. For sheet or cut length, the selection of the sample shall be left to the discretion of the inspector carrying out the tests. 6.1.3 Test pieces For the
34、determination of the chemical composition the test piece shall be prepared in accordance with prEN 1201 9. For the determination of the shape characteristics the test piece shall be the test sample. For the determination of the mechanical characteristics the test piece shall be taken at a distance o
35、f at least 50 mm from the edge of the test sample. 6.2 Test method for chemical composition The test for chemical composition shall be carried out in accordance with prEN 1201 9. 6.3 Test methods for mechanical properties 6.3.1 General All tests for mechanical properties shall be carried out at (20
36、f 2) C. 6.3.2 Tensile testing Tensile testing shall be carried out in accordance with EN 10002-1 using a test piece taken parallel to the rolling direction. The shape of the test piece shall be in accordance with test piece type 1 given in A.2.1 of EN 10002-1 : 1990. 6.3.3 Creep test Creep test shal
37、l be carried out on a device exerting a constant load to the test piece as defined in 6.3.2. A constant stress of (50I 1) N/mmz shall be applied for (60 f 1) min to the test piece. The percentage permanent elongation shall be measured after removal of the load. Page 8 EN 988 : 1996 6.3.4 Bend test B
38、end test shall be carried out in accordance with IS0 7438 : 1985 on tensile testing equipment according to EN 10002-1, with the following further requirements: The length of the test piece shall be (50 f 1) mm, taken perpendicular to the rolling direction. Its width shall be i25 f 1 i mm. The fold s
39、hall be parallel to the rolling direction. Prebending of the test piece shall be carried out with a bending device with two supports and a mandrel, according to 4.1 of IS0 7438 : 1985. Final bending of the test piece shall be carried out in accordance with 6.3 to 6.5 of IS0 7438 : 1985, at a relativ
40、e speed of the plates of 30 mm/min. The final force on the test piece shall be (7 500k 100) N with bend radius of O. 6.4 Test methods for shape characteristics 6.4.1 General The test piece for the determination of the shape characteristics shall be either a sheet or a cut length, to ordered width an
41、d length, or part of a strip, to ordered width, cut to length and laid flat. Measurement of lateral curvature or deviation from flatness shall be carried out with a suitable measuring device, such as a feeler gauge, dial gauge or scale. 6.4.2 Lateral curvature test The determination of lateral curva
42、ture (.e. the deviation of a side edge from a straight line) shall be carried out with the test piece resting on a flat horizontal surface, against a straightedge as shown in figure 1. The measurement shall be taken on the concave side. 6.4.3 Flatness test No flatness test shall be done on coils or
43、slit coils, except with prior agreement between the purchaser and the supplier. The deviation from flatness due to transverse curvature, longitudinal curvature, buckles and edge waves .e. dimensions d in figures 2 to 5 shall be measured using a straightedge which does not deform the test piece durin
44、g the measurement, and gap gauges. 7 Inspection documents If requested by the purchaser at the time of ordering, the manufacturer shall issue a certificate, according to EN 10204, based on tests of delivered lot or based on statistical quality control measurements, as indicated by the purchaser. Pag
45、e 9 EN 988 : 1996 8 Designation The derivation of a product designation is shown in examples 1 and 2. EXAMPLE 1: Strip conforming to this European Standard, nominal thickness 0,70 mm, nominal width 1 O00 mm, shall be designated: Zinc-comer-titanium EN 988 - 0,70 - 1( Denomination Number of this Euro
46、pean Standard Nominal thickness in millimetres Nominal width in millimetres NOTE: The denominations: E: Zinc-copper-titanium F: Zinc-cuivre-titane D: Titanzink designate the same product. EXAMPLE 2: Sheet conforming to this European Standard, nominal thickness 0,70 mm, nominal width 1 O00 mm, nomina
47、l length 2 O00 mm, shall be designated: Zinc-copper-titanium EN 988 - 0, T Denomination - 0-1( Number of this European Standard Nominal thickness in millimetres I Nominal width in millimetres Nominal length in millimetres 9 Marking, labelling, packaging 9.1 Marking and labelling Unless otherwise agr
48、eed at the time of ordering, the following minimum marking requirements shall apply: - denomination; - number of this European Standard (EN 988); - nominal thickness; - melt andlor coil number; - name of registered identification of manufacturer; - name or identification of rolling mill. Page 10 EN
49、988 : 1996 Marking shall be durable and continously printed on at least 1 row per 600 mm of width directly on the strip after final rolling. For products with treated surfaces, the marking shall be printed on a label or sticker, attached to the product or attached to each bundle or pack at the discretion of the manufacturer. 9.2 Packaging The type and method of packaging shall be at the discretion of the supplier, unless special packaging require- ments have been agreed between the supplier and purchaser at the time of ordering. The packaging shall protect the product in norma
