1、Designation: A626/A626M 03 (Reapproved 2008)1A626/A626M 13Standard Specification forTin Mill Products, Electrolytic Tin Plate, Double Reduced1This standard is issued under the fixed designation A626/A626M; 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 and 5.1.2 in October 2008.1. Scope*1.1 This specification covers double-reduced electrolytic tin plate produced from low-carbon cold-reduced steel furnished incoils and cut sizes for use predominately in the manufacture of cans. It is furnished in commercially available tin coating w
4、eightsmasses and is normally supplied with a trimmed edge.1.2 This specification is applicable to orders in either inch-pound units (as A626) which is supplied in thicknesses from 0.0050to 0.0118 in. or SI units as A626M which is supplied in thicknesses from 0.127 to 0.300 mm.1.3 The values stated i
5、n 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 two systems may result in nonconfor
6、mance 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 applicability of regulatorylimitations
7、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 PlateA754/A754M Test Method for
8、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 the desired product:3.1.1 Name of p
9、roduct (double-reduced electrolytic tin plate) (Section 1),3.1.2 Tin coating weight mass designation, and marking, if any (Section 5, Table 1, Table 1, and Fig. 1Fig 1 and Fig. 2),2),3.1.3 Surface appearance and finish (Section 6),3.1.4 Chemical treatment (Section 7),3.1.5 Oiling (Section 8),3.1.6 T
10、hickness (Specification A623 A623M) (consistent with the intended application),3.1.7 Coil width or cut size in increments of 116 in. or 1 mm,3.1.8 Due to the very distinct directional properties, rolling direction must be specified on cut sizes by underlining the slit(rolling width) dimension (Secti
11、on 4) (consistent with the intended application),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 appr
12、oved Oct. 1, 2008Oct. 1, 2013. Published October 2008 October 2013. Originally approved in 1968. Last previous edition approved in 20032008 asA626/A626M - 03.A626/A626M - 081. DOI: 10.1520/A0626_A0626M-03R08E01.10.1520/A0626_A0626M-13.2 For referencedASTM standards, visit theASTM website, www.astm.o
13、rg, or contactASTM Customer 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 chang
14、es have been made to the 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 offici
15、al document.*A Summary of 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 Mechanical requirement designation (Specification A623 A623M) (consistent with the intended applicatio
16、n),3.1.11 Intended application,3.1.12 Quantity in base boxes SITASSITAs (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 to Specification A626 410 mm if ordered to Specification A626M. Coils should b
17、e specified to a maximum coilweight if ordered to Specification A626 mass if ordered to Specification A626M 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 number and year of issue.NOTE 1A typi
18、cal ordering description is as follows: 1000 base boxes, double-reduced electrolytic tin plate, D50/25, melted, CDC, DOS,ATBC,0.0066-in. thickness, 30 by coil, MR, DR-8 CA, for 307 by 401 welded can bodies in accordance with Specification A626/A626M - XX. 250SITAS,SITAs, double-reduced electrolytic
19、tin plate, D 5.6/2.8, melted, CDC, DOS,ATBC, 0.17-mm thickness, 760 by coil, MR, DR-8, for 99 by 105 mmwelded can bodies to Specification A626/A626M - XX.TABLE 1 Electrolytic Tin Plate Coating Weight MassNOTE 1Listed as follows are commonly produced coating weightsmasses. By agreement between the pr
20、oducer and the purchaser, othercombinations of the coatings may be specified and the appropriateminimum average test values will apply.Designation No.Nominal Tin CoatingWeight Mass eachSurface, lb/base box g/m2Minimum Average CoatingWeight Mass each Sur-face Test Value, lb/baseboxA g/m25 0.6/0.6B 0.
21、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 1.8/1.825 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
22、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 5.2/2.5D 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/
23、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 Electrolytic Tin Plate Coating Weight MassNOTE 1Listed as follows are commonly produced coating weightsmasses. By agreement between the producer and the purchaser, othercombinations of the coat
24、ings may be specified and the appropriateminimum average test values will apply.Designation No.Nominal Tin CoatingWeight Mass eachSurface, lb/base box g/m2Minimum Average CoatingWeight Mass each Sur-face Test Value, lb/baseboxA g/m 25 0.6/0.6B 0.025/0.025 0.6/0.6 0.02/0.02 0.5/0.510 1.1/1.1 0.05/0.0
25、5 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 1.8/1.825 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
26、.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 5.2/2.5D 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.
27、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 averagecoating weight mass (see 5.3 and 5.4).BSome No. 5 melted applications may require revised minimum and maximumlevels for fully alloyed end uses.CThe letter D on differentially coated
28、 tin plate indicates the coated surface to bemarked. For example, the examples indicate that the heavy-coated side is marked(see 5.1.2 and 5.1.3).A626/A626M 132NOTE 2A typical ordering description for cut sizes is as follows: 500 base boxes, single reduced electrolytic tin plate, No. 25, DOS,ATBC, M
29、R, T-2BA, 7C, 0.0110 in. thickness, 30 34 in. by 30 716 in., for 307 diameter general line rings in accordance with Specification A626/A626M-XX. 100SITAS,SITAs, single reduced electrolytic tin plate, 2.8/2.8, DOS,ATBC, MR, DR-8 CA, 7C, 0.28 mm thickness, 781 by 773 mm, for 99 by 105 mmwelded can bod
30、ies to Specification A626A626/A626M/A626M-XX.-XX.NOTE 3The production of coils does not afford the same opportunity for inspection, grading, and sorting as does the production of cut sizes.Accordingly, appropriate processing and quality control procedures are required by the purchaser to obtain opti
31、mum utilization of the material. Cut sizesare line inspected visually and mechanically during production. Sheets having surface imperfections that will not interfere with their utilization areincluded.NOTE 4In inch-pound units, double-reduced electrolytic tin plate is supplied on an area basis expre
32、ssed 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 length andwidth dimensions and sheet count. In SI units, double-reduced electrolytic tin plate is supplied on an a
33、rea 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 thespecified length and width dimensions and sheet count. For calculating mass, the density of steel for tin mil
34、l products is 0.2836 lb/in.3 7850 kg/m3.FIG. 1 Standard Heavy-Side Marking System for Differential Electrolytic Tin PlateA626/A626M 1334. Rolling Direction4.1 Double-reduced plate is stronger and less ductile than single reduced plate and has very distinct directional properties. Therolling directio
35、n must be specified on cut sizes and will be indicated by underlining the slit (rolling width) dimension. To minimizethe flange-cracking hazard when the product is used for can bodies, the rolling direction must be around the circumference of thecan.5. Tin Coating Weight Mass5.1 Class Designation an
36、d Marking:5.1.1 Electrolytic tin plate is commonly produced to the class designations shown in Table 1. Other combinations of coatingsmay be specified by agreement between the producer and the purchaser.5.1.2 Differentially coated tin plate is a product having one surface more heavily tin coated tha
37、n the opposite. The classdesignation is expressed by showing the two tin coating weights masses separated by a slash mark, for example, 50/25 D5.6/2.8. 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 convention
38、s must be brought to the attention of the supplier at the time of order entry.5.1.3 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).
39、The letter D is shown along withthe coating number to indicate the side of the plate to be marked.5.2 Sampling for Tin Coating Weights Masses:5.2.1 When the purchaser wishes to make tests to ascertain compliance with the requirements of this specification for tin coatingweight mass on a lot of any s
40、pecific item of electrolytic tin plate, the following procedure shall be used:5.2.1.1 CoilsOne test strip shall be taken at random from a representative section of each coil across its width. A minimumof three test strips, each taken from different coils from any one item of a specific lot shall be
41、selected.5.2.1.2 From one or two coil lots, each coil should be sampled.Aminimum of three randomly selected test strips shall representthe lot.5.2.1.3 Cut SizesOne sheet shall be taken at random from each 50 packages or part thereof, with a minimum of three differentsample plates, each taken from di
42、fferent bundles from any one item of a specific shipment.5.2.2 Each test sheet shall be spot tested at a minimum of three locations across the rolling direction of the sheet. Spot tests arecustomarily disks or squares 4 in.2 26 cm2 in area; other sizes may be used. In order to secure representative
43、samples, thefollowing procedure shall be used:5.2.2.1 All test spots are taken on a center line at right angles to the rolling direction.5.2.2.2 No test spots shall be closer than 1 in. 25 mm from the mill-trimmed edge of the test sheets.5.2.2.3 No test spots shall be closer than 2 in. 50 mm from on
44、e another.5.2.2.4 If the minimum of three test spots are taken, they shall be edge, center, and edge tests.5.2.2.5 The average of all spot tests on all test strips or sheets represents the average coating weight mass test value.5.3 Coating weight mass test values shall conform to the values shown in
45、 Table 1.5.4 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 weight mass is the X-ray fluorescencemethod, performed in accordance with Test Method A754/A754M
46、. In case of dispute, Method B, Referee Method, shall be used.5.5 Pig tin used in the production of tin plate shall be Grade A for the production of tin plate or ultra thin pure tin as shownin the latest edition of Specification B339.6. Surface Appearance and Finish6.1 Surface AppearanceDouble-reduc
47、ed electrolytic tin plate is customarily produced with a melted coating (bright).Unmelted coating (matte) is also available.6.2 Base Metal FinishDouble-reduced electrolytic tin plate is produced with ground roll finishes.6.2.1 7CA smooth finish with grit lines. The surface roughness will range betwe
48、en 6 and 25 in. Ra 0.152 to 0.635 m Ra.7. Chemical Treatment7.1 Electrolytic tin plate as produced without a surface chemical treatment is subject to tin oxide growth that is manifested bysurface discoloration during storage and subsequent baking operations and may adversely affect application and a
49、dhesion oforganic coatings and lithography, and may cause poor solderability. A chemical treatment is therefore applied in most cases afterthe tin coating has been deposited and immediately preceding the oiling to control tin oxide formation and growth. The chemicaltreatment is applied by passing the strip through
