ASTM_A_623M_-_16.pdf

Designation:A623M16Standard Specification forTin Mill Products,General Requirements Metric1This standard is issued under the fixed designation A623M;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the U.S.Department of Defense.INTRODUCTIONThis specification is the metric counterpart of Specification A623.It is not intended to replace A623.Users of the standard should note several very significant differences in how the product is producedand marketed.(1)The metric product does not carry the overrun associated with tin mill products produced to customary units.Metric tin millproducts are produced to ordered size.(2)The metric product is designated in units of 100 m2called a SITA(System International Tinplate Area),rather than in baseboxes.(3)The metric product is designated by thickness in millimetres rather than by basis weight.(4)Coating weights are given in grams per square metre,not pounds per base box.(5)Thickness tolerances are given in absolute figures instead of a 6 percentage.(6)Each package of metric tin mill products contains 100 sheets,not the 112 of customary unit packages.All of the above significant differences,as well as others of lesser consequence,should be considered when switching fromSpecification A623 to A623M.1.Scope1.1 Thisspecificationcoversagroupofcommonrequirements,which unless otherwise specified in the purchaseorder or in an individual specification,shall apply to tin millproducts.1.2 In case of conflict in requirements,the requirements ofthe purchase order,the individual material specification,andthis general specification shall prevail in the sequence named.1.3 The following safety hazards caveat covers Annex A1through AnnexA8 of this specification:This standard does notpurport to address all of the safety concerns,if any,associatedwith its use.It is the responsibility of the user of this standardto establish appropriate safety and health practices anddetermine the applicability of regulatory limitations prior touse.NOTE1A complete inch-pound companion to Specification A623Mhas been developedA623;therefore,no inch-pound equivalents arepresented.2.Referenced Documents2.1 ASTM Standards:2A370 Test Methods and Definitions for Mechanical Testingof Steel ProductsA700 Guide for Packaging,Marking,and Loading Methodsfor Steel Products for ShipmentA987 Practice for Measuring Shape Characteristics of TinMill ProductsE18 Test Methods for Rockwell Hardness of Metallic Ma-terialsE112 Test Methods for Determining Average Grain Size2.2 Military Standards:3MIL-STD-129 Marking for Shipment and StorageMIL-STD-163 Steel Mill Products,Preparation for Markingand Storage2.3 Federal Standard:3Fed.Std.No.123 Marking for Shipment(Civil Agencies)3.Terminology3.1 Definitions:1This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel and Related Alloys and is the direct responsibility of SubcommitteeA01.20 on Tin Mill Products.Current edition approved Dec.1,2016.Published December 2016.Originallyapproved in 1978.Last previous edition approved in 2011 as A623M 11.DOI:10.1520/A0623M-16.2For 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.3Available from Standardization Documents Order Desk,Bldg.4 Section D,700Robbins Ave.,Philadelphia,PA 19111-5094,Attn:NPODS.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 3.1.1 black plate,nlight-gage,low-carbon,cold-reducedsteel intended for use in the untinned state or for the productionof other tin mill products.It is supplied only in a dry or oiledcondition.3.1.2 box annealing,na process involving slow heating ofcoils to a subcritical temperature,holding,and coolingtherefrom,to recrystallize the grain,and thus,relieve stressesproduced during cold reduction.It is accomplished in a sealedcontainer.By introducing and maintaining an inert or slightlyreducing atmosphere during the cycle,a relatively brightsurface is obtained.3.1.3 bright finish,na surface that has a lustrous appear-ance.3.1.4 burr,nmetal displaced beyond the plane of thesurface by slitting or shearing(see 9.1.7 and 9.2.6).3.1.5 camber,nthe greatest deviation of a coil edge froma straight line.The measurement is taken on the concave sideand is the perpendicular distance from a straight line to thepoint of maximum deviation(see 9.1.9 and 9.2.7).3.1.6 chemical treatment,electrolytic tin plate,na passi-vating chemical treatment applied to the surface of electrolytictin plate to stabilize the plate surface characteristics compatiblewith a specifi