1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN 988 : 1997 The Euro
2、pean Standard EN 988 : 1996 has the status of a British Standard ICS 77.120.60; 77.140.90 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Zinc and zinc alloys Specification for rolled flat products for buildingThis British Standard, having been prepared under the direction of
3、the Engineering Sector Board, was published under the authority of the Standards Board and comes into effect on 15 January 1997 BSI 1997 The following BSI references relate to the work on this standard: Committee reference NFE/8 Draft for comment 93/300802 DC ISBN 0 580 26426 2 BS EN 988 : 1997 Amen
4、dments issued since publication Amd. No. Date Text affected Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee NFE/8, Zinc, upon which the following bodies were represented: British Iron and Steel Producers Association Insti
5、tute of British Foundrymen London Metal Exchange Metal Roofing Contractors Association Zinc Alloy Die Casters Association Zinc Development AssociationBS EN 988 : 1997 BSI 1997 i Contents Page Committees responsible Inside front cover National foreword ii Foreword 2 Text of EN 988 3ii BSI 1997 BS EN
6、988 : 1997 National foreword This British Standard has been prepared by Technical Committee NFE/8, Zinc, and is the English language version of EN 988 : 1996 Zinc and zinc alloys Specifications for rolled flat products for building, published by the European Committee for Standardization (CEN). This
7、 standard supersedes BS 6561 : 1985, which is withdrawn. Cross-references Publication referred to Corresponding British Standard EN 1179 : 1995 BS EN 1179 : 1996 Specification for zinc and zinc alloys Primary zinc EN 10002-1 : 1990 BS EN 10002-1 : 1990 Tensile testing of metallic materials Part 1 :
8、Method of test at ambient temperature EN 10204 BS EN 10204 : 1991 Metallic products Types of inspection documents 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 i
9、i, pages 1 to 8, an inside back cover and back cover.CEN European Committee for Standardization Comite Europe en de Normalisation Europa isches Komitee fu r Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1996 Copyright reserved to CEN members Ref. No. EN 988 : 1996 E EUROPEAN STAND
10、ARD EN 988 NORME EUROPE ENNE EUROPA ISCHE NORM June 1996 ICS 77.120.60; 77.140.90 Descriptors: rolled products, steel strips, zinc products, zinc alloys, buildings, chemical composition, mechanical properties, dimensions, tests, designation, marking, packing English version Zinc and zinc alloys Spec
11、ifications for rolled flat products for building Zinc et alliages de zinc Spe cifications pour produits lamine s plats pour le ba timent Zink und Zinklegierungen Anforderungen an gewalzte Flacherzeugnisse fur das Bauwesen This European Standard was approved by CEN on 1996-03-07. CEN members are boun
12、d 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 Ce
13、ntral 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 a
14、s 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.Page 2 EN 988 : 1996 BSI 1997 Foreword This Europea
15、n Standard has been prepared by Technical Committee CEN/TC 209, Zinc and zinc alloys, 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 December 1996, and
16、conflicting national standards shall be withdrawn at the latest by December 1996. This standard defines product requirements, derived from performance requirements established for various applications in building, and is supported by separate standards for specific and common test methods in the fra
17、mework of CEN/TC 209/SC 3. Annex A (informative) gives information on the physical properties of rolled zinccoppertitanium products. Annex B (informative) gives guidance to the user in calculating masses of the product for a range of thickness. According to CEN/CENELEC Internal Regulations, the nati
18、onal standards organizations of 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 the United Kingdom. Contents Page For
19、eword 2 1 Scope 3 2 Normative references 3 3 Definitions 3 4 Requirements 3 5 Dimensions and tolerances 4 6 Sampling and test methods 4 7 Inspection documents 5 8 Designation 5 9 Marking, labelling, packaging 5 10 Ordering information 5 Figures 1 Lateral curvature 6 2 Transverse curvature 6 3 Longit
20、udinal curvature 7 4 Buckles 7 5 Edge waves 8 Annexes A (informative) Physical properties 8 B (informative) Calculation of mass 8Page 3 EN 988 : 1996 BSI 1997 Table 2. Mechanical properties 0,2 % proof strength, non-proportional extension R p0,2 Tensile strength R m Percentage total elongation at fr
21、acture A 50 mm Percentage elongation after fracture in creep test Bend test N/mm 2 N/mm 2 % % min. min. min. max. 100 150 35 0,1 No cracks on fold 1 Scope This European Standard specifies requirements for rolled flat products for building purposes made from zinccoppertitanium alloy, in the form of s
22、trip, sheet or cut length. It covers products in the range 0,6 mm up to and including 1,0 mm thickness and from 100 mm up to and including 1000 mm width. This standard does not cover formed or shaped products or products prefabricated by any means other than cutting to size. NOTE. By agreement betwe
23、en 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 zinccoppertitanium alloy. 2 Normative references This European Standard incorporates, by dated or undated reference, prov
24、isions 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 European Standard only when incorporated in it
25、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) EN 10204 Metallic products Types of inspection d
26、ocuments prEN 12019 Zinc and zinc alloys Optical emission spectrometric analysis ISO 7438 : 1985 Metallic materials Bend test 3 Definitions For the purposes of this standard, the following definitions apply. 3.1 flat product Product manufactured by rolling, having a rectangular cross-section, the wi
27、dth 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 rolled to final width or strip slit from a wider strip.
28、3.3 coil 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 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
29、 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 or sheet. 4 Requirements 4.1 Manufacturing Zinccoppertitanium alloy shall be made from zinc grade Z1 conforming to EN 1179, that is 99,995 % minim
30、um zinc content, with addition of alloying elements. The flat product shall be made either from casting in slabs or by continuous casting, but either of these shall subsequently be rolled to produce the coil. 4.2 Chemical composition The alloy composition shall conform to the requirements given in t
31、able 1. The chemical composition shall be determined in accordance with 6.1 and 6.2. Table 1. Chemical composition Chemical composition (m/m) % Cu Ti Al Zn 1) min. 0,08 min. 0,06 Remainder max. 1,0 max. 0,2 max. 0,015 1) Zinc of grade Z1, see 4.1. 4.3 Mechanical properties The product shall conform
32、to the requirements given in table 2. The tests shall be carried out in accordance with 6.1 and 6.3.Page 4 EN 988 : 1996 BSI 1997 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 kin
33、d of normal mechanical processing. NOTE. Slight discoloration, 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 su
34、rfaces shall be specified at the time of 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
35、 and strip are normally supplied in the following preferred nominal thicknesses: 0,60 mm; 0,65 mm; 0,70 mm; 0,80 mm; 1,00 mm. 5.2 Width The maximum deviation from the ordered nominal width shall not exceed mm. 0 +2 NOTE. Minimum nominal width is 100 mm, and maximum 1000 mm. 5.3 Length The maximum de
36、viation from the ordered nominal length of sheet or cut length shall not exceed mm. 0 +10 NOTE. Preferred lengths are 2000 mm and 3000 mm. 5.4 Lateral curvature Deviation from straightness, dimension d in figure 1, shall not exceed 1,5 mm/m when tested in accordance with 6.4.2. 5.5 Flatness Deviatio
37、n from flatness, dimension d in figures 2 to 5, shall not exceed 2 mm when tested in accordance with 6.4.3. 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 determ
38、ination of the mechanical 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
39、 or shape characteristics 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
40、 Test pieces For the determination of the chemical composition, the test piece shall be prepared in accordance with prEN 12019. 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 b
41、e taken at a distance of 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 12019. 6.3 Test methods for mechanical properties 6.3.1 General All tests for mechanical properties shall
42、be carried out at (20 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
43、 test Creep test shall be carried out on a device exerting a constant load to the test piece as defined in 6.3.2. A constant stress of (50 1) N/mm 2 shall be applied for (60 1) min to the test piece. The percentage permanent elongation shall be measured after removal of the load. 6.3.4 Bend test Ben
44、d 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 1) mm, taken perpendicular to the rolling direction. Its width shall be (25 1) mm. The fold shall be
45、 parallel to the rolling direction. Pre-bending of the test piece shall be carried out with a bending device with two supports and a mandrel, according to 4.1 of ISO 7438 : 1985. Final bending of the test piece shall be carried out in accordance with 6.3 to 6.5 of ISO 7438 : 1985, at a relative spee
46、d of the plates of 30 mm/min. The final force on the test piece shall be (7500 100) N with bend radius of 0. 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 and length
47、, 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.Page 5 EN 988 : 1996 BSI 1997 6.4.2 Lateral curvature test The determina
48、tion of lateral curvature (i.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 shal
49、l be done on coils or silt 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 i.e. dimensions d in figures 2 to 5 shall be measured using a straightedge which does not deform the test piece during 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 tes
