ASTM_A_308_-_A_308M_-_10.pdf

Designation:A308/A308M10Standard Specification forSteel Sheet,Terne(Lead-Tin Alloy)Coated by the Hot-DipProcess1This standard is issued under the fixed designation A308/A308M;the number immediately following the designation indicates the yearof original adoption or,in 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.Scope*1.1 This specification covers sheet steel in coils and cutlengths coated with lead-tin alloy(terne metal,see 3.2.3)by thehot-dip process.This material is commonly known as terne andis used where ease of solderability and a degree of corrosionresistance are desirable.It is especially suitable where resis-tance to gasoline is required.Terne-coated sheet is also used forstamping,where the coating acts as a lubricant in the die,lessening difficulties in drawing.The weight of coating,alwaysexpressed as total coating on both sides,shall be specified inaccordance with Table 1.1.2 Material furnished under this specification shall con-form to the applicable requirements of the latest issue ofSpecification A924/A924M,unless otherwise provided herein.1.3 Terne-coated steel is available in a number of designa-tions,types,and grades.1.4 This specification is applicable to orders in eitherinch-pound units(as A308)or SI units(as A308M).Values ininch-pound and SI units are not necessarily equivalent.Withinthe text,SI units are shown in brackets.Each system shall beused independently of the other.1.5 Unless the order specifies the“M”designation(SIunits),the product shall be furnished to inch-pound units.1.6 The text of this specification references notes andfootnotes that provide explanatory material.These notes andfootnotes,excluding those in tables and figures,shall not beconsidered as requirements of this specification.1.7 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 and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2A309 Test Method for Weight and Composition of Coatingon Terne Sheet by the Triple-Spot TestA902 Terminology Relating to Metallic Coated Steel Prod-uctsA924/A924M Specification for General Requirements forSteel Sheet,Metallic-Coated by the Hot-Dip ProcessE517 Test Method for Plastic Strain Ratio r for Sheet MetalE646 Test Method for Tensile Strain-Hardening Exponents(n-Values)of Metallic Sheet Materials3.Terminology3.1 DefinitionsFor definitions of terms and abbreviationsused in this specification,see Terminology A902.3.2 Definitions of Terms Specific to This Standard:3.2.1 electrolytic nickel plate,na nickel coating predepos-ited on steel sheet;used to promote a more uniform and morecorrosion-resistant hot-dipped,long terne coating.3.2.2terne-coated sheet,nsteel sheet coated by immer-sion in molten terne metal;the steel sheet prior to immersion inthe terne metal is either bare(uncoated)or with a predepositedelectrolytic nickel coating.3.2.3 terne metal,nan alloy of lead with a small percent-age of tin sufficient to obtain a smooth continuous coating.3.2.3.1 DiscussionThe minimum tin content is normally8%,with higher percentages used depending on the type ofcoating equipment used.4.Classification4.1 The material is available in four designations,as fol-lows:4.1.1 Commercial steel(CS Types A,B,and C),4.1.2 Deep drawing steel(DDS),4.1.3 Extra deep drawing steel(EDDS),and1This specification is under the jurisdiction of ASTM Committee A05 onMetallic-Coated Iron and Steel Products and is the direct responsibility of Subcom-mittee A05.11 on Sheet Specifications.Current edition approved Jan.15,2010.Published January 2010.Originallyapproved in 1947.Last previous edition approved in 2006 as A308/A308M-06.DOI:10.1520/A0308_A0308M-10.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual 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 4.1.4 Structural steel(SS).4.2 Structural steel is available in several grades.4.3 The material is available with several coating weightsmasses(coating designations)as shown in Table 1.5.Ordering Information5.1 Terne-coated sheet in coils or cut lengths is produced tothickness requirements expressed to 0.001 in.0.01 mm.Thethickness of the sheet includes both the base metal and thecoating.5.2 Orders for material under this specification shall includethe following information,as necessary,to describe adequatelythe required