ASTM_A_684_-_A_684M_-_17.pdf

Designation:A684/A684M17Standard Specification forSteel,Strip,High-Carbon,Cold-Rolled1This standard is issued under the fixed designation A684/A684M;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 U.S.Department of Defense.1.Scope*1.1 This specification covers cold-rolled,high-carbon stripin coils or cut lengths.Strip is classified as product that is0.3000 in.7.6 mm or less in thickness and over12to231516in.12.5 to 600 mm in width,inclusive.Strip toleranceproducts may be available in widths wider than 231516in.(600 mm)by agreement between purchaser and supplier;however,such products are technically classified as cold-rolledsheet.The maximum of the specified carbon range is over 0.25to 1.35%,inclusive.It is furnished in the following types asspecified:1.1.1 Soft spheroidized annealed high-carbon steel is in-tended for applications requiring maximum cold forming.It isnormally produced to give the lowest maximum Rockwellhardness for each grade.1.1.2 Soft annealed high-carbon steel is intended for appli-cations requiring moderate cold forming.It is produced to amaximum Rockwell hardness.1.1.3 Intermediate hardness high-carbon steel is intendedfor applications where cold forming is slight or a stiff,springyproduct is needed,or both.It is produced to specified Rockwellhardness ranges,the maximum being higher than obtained forthe annealed type.1.1.4 Full hard high-carbon steel is intended for flat appli-cations.It is produced to minimum Rockwell hardnessrequirements,which vary with grade,microstructure andgauge.Full hard can be produced with either a pearlitic orspheroidized microstructure or a mixture of both.The mini-mum hardness should be established between the consumerand the producer.1.2 This specification is applicable for orders in eitherinch-pound units or SI units.1.3 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard.The values stated ineach system may not be exact equivalents;therefore,eachsystem shall be used independently of the other.Combiningvalues from the two systems may result in non-conformancewith the standard.1.4 The tolerances in this specification are different thanthose in Specification A568/A568M and Specification A109/A109M.1.5 For the purpose of determining conformance with thisspecification,values shall be rounded to the nearest unit in theright hand place of figures used in expressing the limitingvalues in accordance with the rounding method of PracticeE29.1.6 This specification is expressed in both inch-pound unitsand SI units.However,unless the order specifies the applicable“M”specification designation(SI units),the material shall befurnished to inch-pound units.The metric portions of the tablesherein list permissible variations in dimensions and mass(seeNote 1)in SI(metric)units.The values listed are not exactconversions of the values listed in the inch-pound tables butinstead are rounded or rationalized values.Conformance to SItolerances is mandatory when the“M”specification is used.NOTE1The term weight is used when inch-pound units are thestandard.However,under SI the preferred term is mass.1.7 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2A109/A109M Specification for Steel,Strip,Carbon(0.25Maximum Percent),Cold-RolledA370 Test Methods and Definitions for Mechanical Testingof Steel ProductsA568/A568M Specification for Steel,Sheet,Carbon,Structural,and High-Strength,Low-Alloy,Hot-Rolled and1This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel and Related Alloys and is the direct responsibility of SubcommitteeA01.19 on Steel Sheet and Strip.Current edition approved May 1,2017.Published May 2017.Originallyapproved in 1973.Last previous edition approved in 2015 as A684/A684M 15.DOI:10.1520/A0684_A0684M-17.2For 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 StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of Internation