1、Designation:A84817Standard Specification forLow-Carbon Magnetic Iron1This standard is issued under the fixed designation A848;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
2、 the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This specification covers the requirements for wroughtlow-carbon iron typically having a carbon content of 0.015%or less with the remainder of the chemical composition be
3、ingsubstantially iron.1.1.1 Two alloy types are covered:Type 1 is a low-phosphorous grade and Type 2 contains a phosphorous additionto improve machinability.1.2 This specification also covers alloys supplied by aproducer or converter in the form and condition suitable forfabrication into parts which
4、 will be subsequently heat treated tocreate the desired magnetic characteristics.It covers alloyssupplied in the form of forging billets,hot-rolled products,andcold-finished bar,wire,and strip.1.3 This specification does not cover iron powders capableof being processed into magnetic components.Pleas
5、e refer tothe following ASTM Standards for information regardingpowdered metal materials and magnetic components:Specifi-cations A811,A839,and A904.1.4 This specification does not cover flat-rolled,low-carbonelectrical steels.Please refer to Specification A726 for infor-mation regarding these materi
6、als.1.5 The values stated in SI units are to be regarded asstandard.The values given in parentheses are mathematicalconversions to customary(cgs-emu and inch-pound)unitswhich are provided for information only and are not consideredstandard.1.6 This standard does not purport to address all of thesafe
7、ty 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.1.7 This international standard was developed in accor-dance with internationa
8、lly 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:2A34/A34M Practic
9、e for Sampling and Procurement Testingof Magnetic MaterialsA340 Terminology of Symbols and Definitions Relating toMagnetic TestingA341/A341M Test Method for Direct Current MagneticProperties of Soft Magnetic Materials Using D-C Per-meameters and the Point by Point(Ballistic)Test MethodsA596/A596M Te
10、st Method for Direct-Current MagneticProperties of Materials Using the Ballistic Method andRing SpecimensA726 Specification for Cold-Rolled Magnetic LaminationQuality Steel,Semiprocessed TypesA773/A773M Test Method for Direct Current MagneticProperties of Low Coercivity Magnetic Materials UsingHyste
11、resigraphsA811 Specification for Soft Magnetic Iron Parts Fabricatedby Powder Metallurgy TechniquesA839 Specification for Iron-Phosphorus Powder MetallurgyParts for Soft Magnetic ApplicationsA904 Specification for 50 Nickel-50 Iron Powder Metal-lurgy Soft Magnetic Parts2.2 Other:IEC Publication 6040
12、4-7 Magnetic Materials Part 7:Method of Measurement of the Coercivity of MagneticMaterials in an Open Magnetic Circuit33.Terminology3.1 The terms and symbols used in this specification,unlessotherwise noted,are defined in Terminology A340.1This specification is under the jurisdiction of ASTM Committ
13、ee A06 onMagnetic Properties and is the direct responsibility of Subcommittee A06.02 onMaterial Specifications.Current edition approved April 1,2017.Published May 2017.Originallyapproved in 1985.Last previous edition approved in 2011 as A848 01(2011).DOI:10.1520/A0848-17.2For referenced ASTM standar
14、ds,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 International Electrotechnical Commission(IEC),3,rue deVaremb,1st Floor,P.O.Bo
15、x 131,CH-1211,Geneva 20,Switzerland,http:/www.iec.ch.Copyright 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 De
16、cision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 4.Ordering Information4.1 Orders to this specification shall include as much of thefollowing information as is required to describe the desiredmaterial:4.1.1 ASTM specification number and alloy type.4.1.2 Dimensions and TolerancesDimensional tolerancesare to be mutually agreed upon between the user and theproducer.4.1.3 Q
