1、BRITISH STANDARD BS 405:1987 Incorporating Amendment No. 1 Specification for Uncoated expanded metal carbon steel sheets for general purposes UDC 669.14BS405:1987 This British Standard, having been prepared under the directionof the Iron and Steel Standards Committee, was published under the authori
2、ty ofthe Board of BSI and comesintoeffect on 30October1987 BSI 08-1999 First published May1945 First revision October1987 The following BSI references relate to the work on this standard: Committee reference ISM/10 Draft for comment 86/35821 DC ISBN 0 580 16161 7 Committees responsible for this Brit
3、ish Standard The preparation of this British Standard was entrusted by the Iron and Steel Standards Committee (ISM/-) to Technical Committee ISM/10, upon which the following bodies were represented: British Engine Group of SMMT British Railways Board British Steel Industry Cold Rolled Sections Assoc
4、iation Institution of Production Engineers Society of Motor Manufacturers and Traders Ltd The following bodies were also represented in the drafting of the standard, through sub-committees and panels: British Welded Steel Tube Association Institution of Mechanical Engineers National Association of S
5、teel Stockholders Amendments issued since publication Amd. No. Date of issue Comments 6660 January 1991 Indicated by a sideline in the marginBS405:1987 BSI 08-1999 i Contents Page Committees responsible Inside front cover Foreword ii 1 Scope 1 2 Definitions 1 3 Material 1 4 Manufacture 1 5 Dimension
6、s 1 6 Tolerances on mass per square metre 1 7 Characteristics of expanded metal sheets 2 8 Finish 2 9 Marking 2 Appendix A Information to be supplied by the purchaser 9 Figure 1 Mesh dimensions 2 Figure 2 Sheet sizes 2 Figure 3 Open areas: normal incidence and maximum incidence 3 Table 1 Tolerances
7、on mass per square metre 1 Table 2 Characteristics of conventional expanded metal sheetsupto28.5LW 9.5SW 4 Table 3 Characteristics of conventional expanded metal sheetsfrom30.5LW 11.5SW to61.0LW 24.5SW 5 Table 4 Characteristics of conventional expanded metal sheetsfrom76.0LW 34.0SW to114.5LW 40.5SW
8、6 Table 5 Characteristics of conventional expanded metal sheets200.0LW 76.0SW 7 Table 6 Characteristics of flattened expanded metal sheets 8 Publication referred to Inside back coverBS405:1987 ii BSI 08-1999 Foreword This British Standard has been prepared under the direction of the Iron and Steel S
9、tandards Committee and is a revision of BS405:1945, which is withdrawn. This revision updates and metricates BS405:1945 and introduces flattened expanded metal. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for t
10、heir 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, pagesi andii, pages1to10, an inside back cover and a back cover. This standard has been updated (see
11、copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover.BS405:1987 BSI 08-1999 1 1 Scope This British Standard specifies requirements for designation, material, manufacture and dimensions of uncoated conventional and flattened
12、 expanded metal carbon steel sheets for general purposes. NOTE 1The information to be supplied by the purchaser in the enquiry and order is given inAppendix A. NOTE 2The title of the publication referred to in this standard is listed on the inside back cover. 2 Definitions For the purposes of this B
13、ritish Standard the following definitions apply. 2.1 long way of mesh (LW) for conventional expanded metal the length of the pitch of the major axis of the diamond. For flattened expanded metal the length of the major axis of the aperture (seeFigure 1) 2.2 short way of mesh (SW) for conventional exp
14、anded metal the length of the pitch of the minor axis of the diamond. For flattened expanded metal the length of the minor axis of the aperture (seeFigure 1) 3 Material The blank steel sheets or plates from which expanded metal is made shall be one of the grades specified in BS1449-1. NOTEUnless the
15、 purchaser indicates at the time of enquiry and order which of the grades is required, the manufacturer will supply either grade CR4 or HR4 at his discretion. 4 Manufacture 4.1 Conventional expanded metal Each sheet of conventional expanded metal shall be made by slitting steel plate or sheet and st
16、retching the strands so formed at right angles to the plane of the steel plate or sheet so as to form a network of diamond shaped holes. 4.2 Flattened expanded metal Flattened expanded metal shall be produced by rolling of conventional expanded metal so that the strands are in the same plane as the
17、sheet. 5 Dimensions 5.1 Sheet size Sheet sizes shall be specified with the long way dimension first followed by the nominal short way dimension (eg,2440 long way of mesh,1220 nominal short way of mesh) (seeFigure 2). NOTEIn this example, the normal abbreviation would be2440LW 1220SW. 5.2 Tolerances
18、on sheet sizes The tolerances on sheet sizes for conventional expanded metal shall be as follows. NOTE 1More precise tolerances can be made available. NOTE 2No tolerances are specified for sizes of flattened expanded metal but sheets that are denoted inTable 6 as being normally available are always
19、supplied oversize. NOTE 3No tolerances are specified for flatness, levelness, or out of squareness. 6 Tolerances on mass per square metre The tolerances on mass per square metre shall be as given inTable 1. Table 1 Tolerances on mass per square metre Sheets up to and including2440LW +10mm, 5mm Sheet
20、s over 2440LW 14mm Sheets up to and including 2440SW +12mm 6mm or plus orminus half the shortway mesh size given in Table 2,Table 3,Table 4 orTable 5 whichever is the greater Sheets over 2440SW 15mm or plus or minusthe shortway meshsize given in Table 2,Table 3,Table 4 orTable 5 whichever is the gre
21、ater Mesh reference numbers Tolerances % EX1 to EX16 EX17 to EX34 EX35 to EX41 EX42 to EX50 EX51 & EX52 EX53 to EX61 EF101 to EF125 15 15 15 10 15 10 15BS405:1987 2 BSI 08-1999 7 Characteristics of expanded metal sheets The mesh reference numbers, nominal mesh sizes and nominal masses per square met
22、re for conventional expanded metal sheets shall be as given inTable 2,Table 3,Table 4 andTable 5. The mesh reference numbers, nominal mesh sizes, nominal masses per square metre and nominal thicknesses before flattening for flattened expanded metal sheets shall be as given inTable 6. NOTE 1The calcu
23、lated details of mesh for both conventional and flattened expanded metal sheets are given inTable 2 toTable 6 for information. NOTE 2For conventional expanded metal two calculated values for percentage of open area are shown. (SeeFigure 3.) a) Normal incidence, i.e. when viewed with the sheet held a
24、t right angles to the line of vision. b) Maximum incidence, i.e. when viewed with the sheet slanting so that the width of strand is parallel to the line of vision thus presenting the greatest free area. For flattened expanded metal the calculated normal incidence value only is shown inTable 6. 8 Fin
25、ish The finished expanded metal sheets shall be free from flaws, joins, broken strands and other inherent raw material defects. 9 Marking For each consignment of expanded metal sheets the manufacturer shall attach securely an identification label bearing the following information. a) The manufacture
26、rs name or identifying mark. b) The number and date of this BritishStandard,i.e.BS405:1987 1) . c) Either the specified mesh reference number or a number which can be related to the specified mesh reference number. d) The order number. Figure 1 Mesh dimensions Figure 2 Sheet sizes 1) Marking BS 405:
27、1987 on or in relation to a product represents a manufacturers declaration of conformity,i.e. a claim by or on behalf of the manufacturer that the product meets the requirements of the standard. The accuracy of the claim is therefore solely the responsibility of the person making the claim. Such a d
28、eclaration is not to be confused with third party certification of conformity, which may also be desirable.BS405:1987 BSI 08-1999 3 Figure 3 Open areas: normal incidence and maximum incidenceBS 405:1987 4 BSI 08-1999 Table 2 Characteristics of conventional expanded metal sheets up to28.5LW 9.5SW Mes
29、h reference number Nominal mesh size pitch centre to centre Calculated details of mesh (for information) Nominal thickness Nominal mass per square metre Nominal sheet sizes (LW SW) (in millimetres) a 1220 610 1220 760 1220 915 1220 1220 1830 915 2440 915 2440 1220 2440 1830 Mesh size pitch centre to
30、 centre Open area Width of strand Incidence LW SW LW SW Normal Maximum mm mm mm mm % % mm mm kg EX1 5.84 3.50 42 54 0.79 0.60 2.11 EX2 6.0 3.5 5.84 3.39 24 35 1.17 0.60 3.25 EX3 5.84 3.50 7 9 1.58 0.60 4.23 EX4 10.0 5.5 10.24 5.64 70 78 0.79 0.60 1.31 EX5 10.24 5.64 58 69 1.16 0.60 1.95 EX6 10.24 5.
31、64 54 67 1.17 0.75 2.44 EX7 10.24 5.64 47 59 1.55 0.60 2.58 EX8 10.24 5.64 48 58 1.17 1.00 3.25 EX9 10.24 5.64 46 61 1.55 0.75 3.23 EX10 10.24 5.64 47 55 1.17 1.20 3.90 EX11 10.24 5.64 42 55 1.55 1.00 4.30 EX12 10.0 5.0 10.24 4.76 37 53 1.52 1.00 5.02 EX13 14.5 5.5 14.29 5.64 57 68 1.17 1.00 3.25 EX
32、14 19.0 7.5 19.05 7.43 52 65 1.70 1.00 3.59 EX15 28.5 9.5 28.58 9.52 61 73 1.65 1.00 2.72 EX16 28.58 9.52 61 73 1.98 1.20 3.92 a denotes sizes normally available.BS 405:1987 BSI 08-1999 5 Table 3 Characteristics of conventional expanded metal sheets from30.5LW 11.5SW to61.0LW 24.5SW Mesh reference n
33、umber Nominal mesh size pitch centre to centre Calculated details of mesh (for information) Nominal thickness Nominal mass per square metre Nominal sheet sizes (LW SW) (in millimetres) a 1830 915 2440 915 2440 1220 2440 1525 2440 1830 2440 2440 Mesh size pitch centre to centre Open area Width of str
34、and Incidence LW SW LW SW Normal Maximum mm mm mm mm % % mm mm kg EX17 30.5 11.5 30.48 11.72 77 81 1.19 1.20 1.92 EX18 30.48 11.72 77 83 1.63 1.00 2.17 EX19 30.48 11.72 68 78 2.06 1.20 3.30 EX20 30.48 11.72 62 76 2.36 1.20 3.79 EX21 30.48 11.72 67 75 1.98 1.60 4.24 EX22 30.48 11.72 59 71 2.36 1.60 5
35、.06 EX23 38.0 17.0 38.10 16.93 73 86 2.31 1.20 2.57 EX24 16.5 38.10 16.48 74 83 2.25 1.60 3.43 EX25 17.0 38.10 16.93 62 76 3.10 1.60 4.57 EX26 17.0 38.10 16.93 36 55 4.75 3.00 13.20 EX27 50.80 22.58 85 86 1.60 1.60 1.76 EX28 50.80 22.58 83 88 2.34 1.20 1.95 EX29 50.80 22.58 81 87 2.24 1.60 2.49 EX30
36、 51.0 22.5 50.80 22.58 76 85 3.05 1.60 3.39 EX31 50.80 22.58 76 81 2.52 2.50 4.37 EX32 50.80 22.58 69 76 3.12 3.00 6.52 EX33 50.80 22.58 65 73 3.89 3.00 8.09 EX34 61.0 24.5 60.96 24.38 82 87 2.16 1.60 2.22 a denotes sizes normally available.BS 405:1987 6 BSI 08-1999 Table 4 Characteristics of conven
37、tional expanded metal sheets from76.0LW 34.0SW to114.5LW 40.5SW Mesh reference number Nominal mesh size pitch centre to centre Calculated details of mesh (for information) Nominal thickness Nominal mass per square metre Nominal sheet sizes (LW SW) (in millimetres) a 1830 915 1830 1220 1830 1525 1830
38、 1830 1830 2440 2440 915 2440 1220 2440 1525 2440 1830 2440 2440 3660 1220 3660 1525 3660 1830 3660 2440 4880 1220 4880 1525 4880 1830 4880 2440 Mesh size pitch centre to centre Open area Width of strand Incidence LW SW LW SW Normal Maximum mm mm mm mm % % mm mm kg EX35 76.0 34.0 76.20 33.87 86 91 2
39、.72 1.60 2.02 EX36 76.20 33.87 82 85 2.92 2.50 3.37 EX37 76.20 33.87 76 82 3.58 3.00 4.97 EX38 76.20 33.87 74 79 3.89 3.00 5.39 EX39 85.5 39.5 85.73 39.33 85 88 2.59 2.50 2.59 EX40 40.5 85.73 40.64 84 85 3.18 3.00 3.67 EX41 101.5 51.0 101.60 50.80 89 90 2.09 2.50 2.08 EX42 101.60 50.80 84 87 3.35 3.
40、00 3.11 EX43 101.60 50.80 84 86 3.96 3.00 3.67 EX44 101.60 50.80 80 84 5.03 3.00 4.66 EX45 114.5 32.5 114.30 32.33 82 85 3.07 3.00 3.67 EX46 39.5 114.30 39.33 80 85 4.58 3.00 5.48 EX47 40.5 114.30 40.64 71 82 6.32 3.00 7.32 EX48 114.30 40.64 67 77 5.92 4.70 10.73 EX49 114.30 40.64 64 77 7.90 4.70 14
41、.34 EX50 114.30 40.64 52 67 9.47 4.70 17.18 a denotes sizes normally available.BS 405:1987 BSI 08-1999 7 Table 5 Characteristics of conventional expanded metal sheets200.0LW 76.0SW Mesh reference number Nominal mesh size pitch centre to centre Calculated details of mesh (for information only) Nomina
42、l thickness Nominal mass per square metre Nominal sheet sizes (LW SW) (in millimetres) a 2440 1220 2440 1830 2440 2290 3660 1220 3660 1830 3660 2290 4880 1220 4880 1830 4880 2290 Mesh size pitch centre to centre Size of strand LW SW LW SW mm mm mm mm mm mm kg EX51 200.0 76.0 200.03 76.2 4.8 1.60 1.5
43、7 EX52 200.03 76.2 3.2 3.00 2.00 EX53 200.03 76.2 4.0 3.00 2.45 EX54 200.03 76.2 4.6 3.00 2.87 EX55 200.03 76.2 5.9 3.00 3.67 EX56 200.03 76.2 4.6 4.70 4.50 EX57 200.03 76.2 7.7 3.00 4.78 EX58 200.03 76.2 5.9 4.70 5.71 EX59 200.03 76.2 7.9 4.70 7.63 EX60 200.03 76.2 7.9 6.30 10.28 EX61 200.03 76.2 1
44、1.9 6.30 15.42 a denotes sizes normally available.BS 405:1987 8 BSI 08-1999 Table 6 Characteristics of flattened expanded metal sheets Mesh reference number Nominal aperture size Calculated details of mesh after flattening (for information) Nominal mass per square metre Nominal thickness before flat
45、tening Nominal sheet sizes (LW SW) (in millimetres) a 1220 1830 1220 610 1220 915 1220 2440 1220 2745 1220 2895 1220 3505 1830 915 2440 915 2440 1220 Aperture size Open area Size of strand LW SW LW SW Width Thickness mm mm mm mm % mm mm kg mm EF101 3.0 1.0 2.79 0.81 26 0.76 0.58 3.01 0.60 EF102 4.0
46、2.0 3.81 2.03 46 0.79 0.58 1.99 0.60 EF103 7.0 3.5 6.85 3.56 52 1.30 0.99 3.00 1.00 EF104 14.0 5.0 14.22 4.83 52 1.85 0.96 3.30 1.00 EF105 24.5 9.3 24.38 9.40 76 1.22 1.14 1.87 1.20 EF106 25.0 8.5 25.15 8.64 70 1.65 0.94 2.06 1.00 EF107 24.5 7.5 24.38 7.62 63 2.08 1.14 3.17 1.20 EF108 24.5 7.0 24.38
47、 7.11 57 2.39 1.14 3.64 1.20 EF109 24.5 8.0 24.38 7.87 62 2.06 1.47 4.07 1.60 EF110 23.0 6.0 23.11 5.84 43 3.20 1.52 6.27 1.60 EF111 33.5 12.5 33.53 12.45 71 2.34 1.14 2.47 1.20 EF112 33.0 11.0 32.77 10.92 59 3.18 1.50 4.41 1.60 EF113 43.0 20.5 42.93 20.32 83 1.73 1.45 1.74 1.60 EF114 43.5 18.0 43.43 18.03 76 2.31 1.14 1.85 1.20 EF115 44.0 19.0 43.94 18.80 76 2.3
