1、Designation: A624/A624M 03 (Reapproved 2008)1A624/A624M 13Standard Specification forTin Mill Products, Electrolytic Tin Plate, Single Reduced1This standard is issued under the fixed designation A624/A624M; the number immediately following the designation indicates the yearof original adoption or, in
2、 the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval.A superscript epsilon () indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Department of Defense.1 NOTEEditoria
3、lly changed 4.1.2 in October 2008.1. Scope*1.1 This specification covers single-reduced electrolytic tin plate produced from low-carbon cold-reduced steel furnished incoils and cut sizes for use in the manufacture of cans, closures, crowns, and other products. It is furnished in commerciallyavailabl
4、e tin coating weights masses, and is normally supplied with a trimmed edge.1.2 This specification is applicable to orders in either inch-pound units (as A624) which is supplied in nominal thicknesses from0.0061 to 0.0149 in. or SI units as A624M which is supplied in nominal thicknesses from 0.155 to
5、 0.378 mm.1.3 The values stated in either inch-pound or SI units are to be regarded as standard. Within the text, the SI units are shownin brackets. The values stated in each system are not exact equivalents. Therefore, each system must be used independently of theother. Combining values from the tw
6、o systems may result in nonconformance with this specification.1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibilityof the user of this standard to establish appropriate safety and health practices and determine the applic
7、ability of regulatorylimitations prior to use.2. Referenced Documents2.1 ASTM Standards:2A623 Specification for Tin Mill Products, General RequirementsA623M Specification for Tin Mill Products, General Requirements MetricA630 Test Methods for Determination of Tin Coating Weights for Electrolytic Tin
8、 PlateA754/A754M Test Method for Coating Weight (Mass) of Metallic Coatings on Steel by X-Ray FluorescenceB339 Specification for Pig Tin3. Ordering Information3.1 Orders for product under this specification shall include the following information, as required and applicable, to describeadequately th
9、e desired product:3.1.1 Name of product (single-reduced electrolytic tin plate) (Section 1),3.1.2 Tin coating weight mass designation and marking, if any (Section 4, Table 1, Table 1, and Fig. 1Figs 1 and Fig. 2),2),3.1.3 Surface appearance and finish (Section 5),3.1.4 Chemical treatment (Section 6)
10、,3.1.5 Oiling (Section 7),3.1.6 Thickness (Specification A623 A623M) (this must be consistent with the intended application),3.1.7 Coil width or cut size in increments of 116 in. or 1 mm,3.1.8 Where required, rolling direction will be specified on cut sizes and will be indicated by underlining the s
11、lit (rolling width)dimension,3.1.9 Steel type (Specification A623 A623M),1 This specification is under the jurisdiction ofASTM Committee A01 on Steel, Stainless Steel and RelatedAlloysand is the direct responsibility of Subcommittee A01.20on Tin Mill Products.Current edition approved Oct. 1, 2008Oct
12、. 1, 2013. Published October 2008 October 2013. Originally approved in 1968. Last previous edition approved in 2008 asA624/A624M - 03.A624/A624M - 081. DOI: 10.1520/A0624_A0624M-03R08E01.10.1520/A0624_A0624M-13.2 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Custo
13、mer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the
14、 previous version. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current versionof the standard as published by ASTM is to be considered the official document.*A Summary o
15、f Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States13.1.10 Temper designation (Specification A623 A623M) (this must be consistent with the intended application),3.1.11 Intended applicat
16、ion,3.1.12 Quantity in base boxes (SITAS)(SITAs) (see Note 4),3.1.13 On coils, specify minimum or range of acceptable inside diameters. The standard inside diameter is approximately 16in. if ordered as A624 410 mm if ordered as A624M. Coils should be specified to a maximum coil weight if ordered as
17、A624mass if ordered as A624M, or maximum outside diameter or both,3.1.14 Packaging,3.1.15 Special requirements where applicable, J = plate or K = plate, and3.1.16 ASTM specification designation and year of issue.NOTE 1A typical ordering description for coils is as follows: 1250 base boxes, single re
18、duced, electrolytic tin plate, No. 20, DOS,ATBC, L, T-5 CA,7C, 0.0088 in. thickness 31 14 in. by coil, 16 in. inside diameter, 65 in. maximum outside diameter, 25 000 lbs maximum coil weight, for 300 diametersanitary open top ends in accordance with Specification A624/A624M - XX. 250 SITAS,SITAs, si
19、ngle reduced electrolytic tin plate, 2.2/2.2, DOS,ATBC,TABLE 1 Electrolytic Tin Plate Coating Weight MassNOTE 1Listed below are commonly produced coating weightsmasses. By agreement between the producer and the purchaser, othercombinations of the coatings may be specified and the appropriateminimum
20、average test values will apply.Designation No.Nominal Tin CoatingWeight Mass eachSurface, lb/base box g/m2Minimum AverageCoating Weight Masseach Surface TestValue, lb/base boxAg/m25 0.6/0.6B 0.025/0.025 0.6/0.6 0.02/0.02 0.5/0.510 1.1/1.1 0.05/0.05 1.1/1.1 0.04/0.04 0.9/0.915 1.7/1.7 0.075/0.075 1.7
21、/1.7 0.06/0.06 1.4/1.420 2.2/2.2 0.10/0.10 2.2/2.2 0.08/0.08 1.8/1.825 2.8/2.8 0.125/0.125 2.8/2.8 0.11/0.11 2.5/2.535 3.9/3.9 0.175/0.175 3.9/3.9 0.16/0.16 3.6/3.650 5.6/5.6 0.25/0.25 5.6/5.6 0.23/0.23 5.2/5.275 8.4/8.4 0.375/0.375 8.4/8.4 0.35/0.35 7.8/7.8100 11.2/11.2 0.50/0.50 11.2/11.2 0.45/0.4
22、5 10.1/10.1D 50/25 D 5.6/2.8C 0.25/0.125 5.6/2.8 0.23/0.11 5.2/2.5D 75/25 D 8.4/2.8 0.375/0.125 8.4/2.8 0.35/0.11 7.8/2.5D100/25 D 11.2/2.8 0.50/0.125 11.2/2.8 0.45/0.11 10.1/2.5D100/50 D 11.2/5.6 0.50/0.25 11.2/5.6 0.45/0.23 10.1/5.2D135/25 D 15.2/2.8 0.675/0.125 15.2/2.8 0.62/0.11 14.0/2.5TABLE 1
23、Electrolytic Tin Plate Coating Weight MassNOTE 1Listed below are commonly produced coating weightsmasses. By agreement between the producer and the purchaser, othercombinations of the coatings may be specified and the appropriateminimum average test values will apply.Designation No.Nominal Tin Coati
24、ngWeight Mass eachSurface, lb/base box g/m2Minimum AverageCoating Weight Masseach Surface TestValue, lb/base boxAg/m25 0.6/0.6B 0.025/0.025 0.6/0.6 0.02/0.02 0.5/0.510 1.1/1.1 0.05/0.05 1.1/1.1 0.04/0.04 0.9/0.915 1.7/1.7 0.075/0.075 1.7/1.7 0.06/0.06 1.4/1.420 2.2/2.2 0.10/0.10 2.2/2.2 0.08/0.08 1.
25、8/1.825 2.8/2.8 0.125/0.125 2.8/2.8 0.11/0.11 2.5/2.535 3.9/3.9 0.175/0.175 3.9/3.9 0.16/0.16 3.6/3.650 5.6/5.6 0.25/0.25 5.6/5.6 0.23/0.23 5.2/5.275 8.4/8.4 0.375/0.375 8.4/8.4 0.35/0.35 7.8/7.8100 11.2/11.2 0.50/0.50 11.2/11.2 0.45/0.45 10.1/10.1D 50/25 D 5.6/2.8C 0.25/0.125 5.6/2.8 0.23/0.11 5.2/
26、2.5D 75/25 D 8.4/2.8 0.375/0.125 8.4/2.8 0.35/0.11 7.8/2.5D100/25 D 11.2/2.8 0.50/0.125 11.2/2.8 0.45/0.11 10.1/2.5D100/50 D 11.2/5.6 0.50/0.25 11.2/5.6 0.45/0.23 10.1/5.2D135/25 D 15.2/2.8 0.675/0.125 15.2/2.8 0.62/0.11 14.0/2.5AThe minimum spot value shall be not less than 80 % of the minimum aver
27、agecoating weight mass (see 4.3 and 4.4).BSome No. 5 melted applications may require revised minimum and maximumlevels for fully alloyed end uses.CThe letter D on differentially coated tin plate indicates the coated surface to bemarked. For example, the examples indicate that the heavy-coated side i
28、s marked(see 4.1.2 and 4.1.3).A624/A624M 132L,T-5, 7C, 0.22 mm thickness, 794 mm by coil, 410 mm inside diameter, 1650 mm maximum outside diameter, 11 500 kg maximum coil mass, for 73-mmdiameter sanitary open top ends in accordance with Specification A624/A624M - XX.NOTE 2A typical ordering descript
29、ion for cut sizes is as follows: 500 base boxes, single reduced electrolytic tin plate, No. 25, DOS,ATBC, MR,T-2BA, 7C, 0.0110 in. thickness, 30 34 in. by 30 716 in., for 307 diameter general line rings in accordance with Specification A624/A624M - XX. 100SITAS,SITAs, single reduced electrolytic tin
30、 plate, 2.8/2.8, DOS,ATBC, MR, T-2, 7C, 0.28 mm thickness, 781 by 773 mm, for 83-mm diameter generalline rings in accordance with Specification A624/A624M - XX.NOTE 3The production of coils does not afford the same opportunity for inspection, grading, and sorting as does the production of cut sizes.
31、Accordingly, appropriate processing and quality-control procedures are required by the purchaser to obtain optimum utilization of the material. Cut sizesare line inspected visually and mechanically during production. Sheets having surface imperfections that will not interfere with their utilization
32、areincluded.NOTE 4In inch-pound units, single reduced electrolytic tin plate is supplied on an area basis expressed in base boxes. In coils the number of baseboxes is computed from the measured length and the specified width. In cut sizes the number of base boxes is computed from the specified lengt
33、h andwidth dimensions and sheet count. In SI units, single-reduced electrolytic tin plate is supplied on an area basis expressed in SITAS.SITAs. In coils, thenumber of SITASSITAs is computed from the measured length and the specified width. In cut sizes, the number of SITASSITAs is computed from the
34、specified length and width dimensions and sheet count. For calculating mass, the density of steel for tin mill products is 0.2836 lb/in.3 7850 kg/m3.4. Tin Coating Weight Mass4.1 Class Designations and Marking:4.1.1 Electrolytic tin plate is commonly produced to the class designations shown in Table
35、 1. Other combinations of coatingsmay be specified by agreement between the producer and the purchaser.FIG. 1 Standard Heavy Side Marking System for Differential Electrolytic Tin PlateA624/A624M 1334.1.2 Differentially coated tin plate is a product having one surface more heavily tin coated than the
36、 opposite. The classdesignation is expressed by showing the two tin coating weights masses separated by a slash mark, for example, D50/25D5.6/2.8. The first number will represent the coating weight mass on the outside of the coil or the top surface of the cut sizes.Other line marking conventions mus
37、t be brought to the attention of the supplier at the time of order entry.4.1.3 In order to distinguish material having differential coatings, the face with the heavier coating is normally marked. Byarrangement, a special marking can be supplied on the light-coated face (see Fig. 1 and Fig. 2). The l
38、etter D is shown along withthe coating number to indicate the side of the plate to be marked.4.2 Sampling for Tin Coating Weights Masses:FIG. 2 Standard Light Side Marking System for Differential Electrolytic Tin PlateA624/A624M 1344.2.1 When the purchaser wishes to make tests to ascertain complianc
39、e with the requirements of this specification for tin coatingweight mass on a lot of any specific item of electrolytic tin plate, the following procedure shall be used:4.2.1.1 CoilsOne test strip shall be taken at random from a representative section of each coil across its width. A minimumof three
40、test strips, each taken from different coils from any one item of a specific lot shall be selected.4.2.1.2 From one or two coil lots, each coil shall be sampled. A minimum of three randomly selected test strips shall representthe lot.4.2.1.3 Cut SizesOne sheet shall be taken at random from each 50 p
41、ackages, or part thereof, with a minimum of three differentsample plates, each taken from different bundles from any one item of a specific shipment.4.2.2 Each test sheet shall be spot tested at a minimum of three locations across the rolling direction of the sheet. Spot tests arecustomarily disks o
42、r squares 4 in.2 26 cm2 in area; other sizes may be used. In order to secure representative samples, thefollowing procedure shall be used:4.2.2.1 All test spots are taken on a center line at right angles to the rolling direction.4.2.2.2 No test spots shall be closer than 1 in. 25 mm from the mill-tr
43、immed edge of the test sheets.4.2.2.3 No test spots shall be closer than 2 in. 50 mm from one another.4.2.2.4 If the minimum of three test spots are taken they shall be edge, center, and edge tests.4.2.2.5 The average of all spot tests on all test strips or sheets represents the average coating weig
44、ht mass test value.4.3 Coating weight mass test values shall conform to the values shown in Table 1.4.4 Determination of Tin Coating Weights MassesTypical methods for determination of tin coating weights masses aredescribed in Test Methods A630. An acceptable method for determining tin coating weigh
45、t mass is the X-ray fluorescencemethod, performed in accordance with Test Method A754/A754M. In cases of dispute, Method B, Referee Method, shall be used.4.5 Pig tin used in the production of tin plate shall be Grade A for the production of tin plate or ultra pure tin as shown in thelatest revision
46、of Specification B339.5. Surface Appearance and Finish5.1 Surface AppearanceSingle-reduced electrolytic tin plate is customarily produced with a melted coating (bright). Unmeltedcoating (matte) is also available.5.2 Base Metal FinishSingle-reduced electrolytic tin plate is produced with ground roll
47、finishes and shot-blasted roll finishesas follows:5.2.1 Ground Roll Finishes (produced as either melted or unmelted coatings):5.2.1.1 7BA smooth finish which may contain fine grit lines. This finish is specified for special applications.5.2.1.2 7CA smooth finish with grit lines. The surface roughnes
48、s will range between 10 and 25 in. Ra 0.254 to 0.635 mRa. This is the standard finish for tin mill products.5.2.2 Blasted and/or Otherwise Textured Roll Finishes (produced as either melted or unmelted coatings):5.2.2.1 5CAshot blasted finish (SBF) for general applications. The surface roughness will
49、 range from 30 to 60 in. Ra 0.760to 1.52 m Ra.5.2.2.2 5DA shot blasted finish (SBF) for special applications.6. Chemical Treatment6.1 Electrolytic tin plate as produced without a surface chemical treatment is subject to tin oxide growth that is manifested bysurface discoloration during storage and subsequ
