1、Designation:A657/A657M13Standard Specification forTin Mill Products,Black Plate Electrolytic Chromium-Coated,Single and Double Reduced1This standard is issued under the fixed designation A657/A657M;the number immediately following the designation indicates the yearof original adoption or,in the case
2、 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.1.Scope*1.1 This specification covers single-and double-reduced tinmill black plate electrolytically coated
3、with chromium andchromium oxide.The steel is furnished in coils and cut lengthsfor use in the manufacture of cans,closures,crowns,and otherproducts.1.2 This specification is applicable to orders in eitherinch-pound units(as A657)which is supplied in thicknessesfrom 0.0050 to 0.0149 in.or in SI units
4、 as A657M which issupplied in thicknesses from 0.127 to 0.378 mm.1.3 The values stated in either inch-pound or SI units are tobe regarded as standard.Within the text,the SI units are shownin brackets.The values stated in each system are not exactequivalents.Therefore,each system must be used indepen
5、-dently of the other.Combining values from the two systemsmay result in nonconformance with this specification.1.4 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety
6、and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2A623 Specification for Tin Mill Products,General Require-mentsA623M Specification for Tin Mill Products,General Re-quirements MetricA700 Guide for Packaging,Marking,
7、and Loading Methodsfor Steel Products for ShipmentD1125 Test Methods for Electrical Conductivity and Resis-tivity of Water3.Ordering Information3.1 Orders for product under this specification shall includethe following information,as required and applicable,toadequately describe the desired product:
8、3.1.1 Name of product(include whether single-or double-reduced),3.1.2 Thickness(mustbeconsistentwithintendedapplication),3.1.3 Oiling(Section 6),3.1.4 Steel type(MR,L,etc.),3.1.5 Temper designation(T-3,T-4,etc.for single-reduced)or mechanical designation(DR-8,DR-9,etc.,double-reduced),3.1.6 Surface
9、finish(7B,7C,etc.).3.1.7 Coil width or cut size,3.1.8 Rolling direction must be specified on cut sizes andshould be indicated by underlining the slit(rolling width)dimension,3.1.9 On coils,specify minimum or range of acceptableinside diameters.The standard inside diameter is approxi-mately 16 in.if
10、ordered as Specification A657 410 mm ifordered as Specification A657M.Coils should be specified toa maximum coil weight if ordered as Specification A657 massif ordered as Specification A657M,or maximum outsidediameter,or both.3.1.10 Packaging,3.1.11 Special requirements where applicable,and,3.1.12 A
11、STM specification designation and year of issue.NOTE1A typical ordering description for coils is as follows:1250base boxes,single reduced,black plate electrolytic chromium coated,BSO,(0.0093 in.)MR,T-3 BA,3538in.by coil,16 in.inside diameter,59in.maximum outside diameter,25 000 lb maximum coil weigh
12、t,forregular crowns in accordance with Specification A657/A657M-XX.250SITAs,single reduced,black plate electrolytic chromium coated,BSO,0.235 mm thickness,MR,T-3 BA,513,900 mm by coil,410 mm insidediameter,1500 mm maximum outside diameter,11 500 kg maximum coilmass for regular crowns in accordance w
13、ith Specification A657/A657M-XX.NOTE2A typical ordering description of cut sizes is as follows:1000base boxes,double reduced black plated electrolytic chromium coated,BSC,0.0061 in.,MR,DR8 CA,31 by 32 in.,for cap closures inaccordance with Specification A657/A657M-XX.200 SITAs,doublereduced,black pl
14、ate electrolytic chromium coated,BSO,0.155 mmthickness,MR,DR8 CA,788 by 813 mm,cap closures in accordance with1This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel and Related Alloysand is the direct responsibility of SubcommitteeA01.20 on Tin Mill Products.Cur
15、rent edition approved Oct.1,2013.Published October 2013.Originallyapproved in 1972.Last previous edition approved in 2008 as A657/A657M 03(2008)1.DOI:10.1520/A0657_A0657M-13.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annu
16、al Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.*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 States1 Specification A657/A657M-XX.NOTE3The production of coils does not afford the same opportunityfor inspection,grading,and sorting as does the production of cut sizes.Accordingly,appropriate processing and quality-contro
