1、Designation:A 47/A 47M 99Standard Specification forFerritic Malleable Iron Castings1This standard is issued under the fixed designation A 47/A 47M;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
2、parentheses indicates the year of last reapproval.A superscript epsilon(e)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.Scope1.1 This specification2covers ferritic malleable castings forgeneral e
3、ngineering usage at temperatures from normal ambi-ent to approximately 400C(750F).1.2 No precise quantitative relationship can be stated be-tween the properties of the iron in various locations of the samecasting and those of a test specimen cast from the same iron(see Appendix X1).1.3 The values st
4、ated in either inch-pound units or SI unitsare to be regarded separately as standard.Within the text,theSI units are shown in brackets.The values stated in eachsystem are not exact equivalents;therefore,each system shallbe used independently of the other.Combining values from thetwo systems may resu
5、lt in nonconformance with the specifi-cation.2.Referenced Documents2.1 ASTM Standards:A 153 Specification for Zinc Coating(Hot-Dip)on Iron andSteel Hardware3A 247 Test Method for Evaluating the Microstructure ofGraphite in Iron Castings4A 644 Terminology Relating to Iron Castings4E 8 Test Methods fo
6、r Tension Testing of Metallic Materials5E 10 Test Method for Brinell Hardness of Metallic Materi-als5E 18 Test Methods for Rockwell Hardness and RockwellSuperficial Hardness of Metallic Materials5E 140 Hardness Conversion Tables for Metals52.2Military Standard:MIL-STD-129 Marking for Shipment and St
7、orage62.3Federal Standard:Fed.Std.No.123 Marking for Domestic Shipment(CivilianAgencies)63.Terminology3.1 DefinitionsDefinitions for many terms common toiron are found in Terminology A 644.4.Classification4.1 Castings ordered and produced under this specificationare classified under the following gr
8、ades based on tests onseparately cast test bars.Separately cast test bars shall bepoured from the same lot of iron as the castings they representand shall be heat treated with those castings except as providedin 7.2.3.4.1.1 Grade 32510 Grade 22010:4.1.1.1 The first three digits of the grade designat
9、ion indi-cate the minimum yield strength(3100 psi MPa)and the lasttwo digits indicate the minimum elongation(%in 2 in.50mm).5.Ordering Information5.1 The purchase order for castings ordered under thisspecification shall state the specification designation,the yearin which the specification was issue
10、d,and the grade ofmalleable iron to be supplied.Any option or special additionsto the basic requirements of this specification shall be clearlyand fully stipulated.6.Chemical Composition6.1 The chemical composition of the iron shall be such as toproduce the structural and mechanical properties requi
11、red bythis specification.7.Mechanical Properties7.1 Factors influencing the properties of castings and theirrelationship to those of test specimens and separate testcastings are discussed in Appendix X1.7.2 Tension Test Specimens:7.2.1 The tension test specimens shall be cast to the formand dimensio
12、ns shown in Fig.1 or Fig.2,in the same kind ofmolding material used for the production castings.At least1This specification is under the jurisdiction of ASTM Committee A-4 on IronCastings and is the direct responsibility of Subcommittee A04.02 on Malleable IronCastings.Current edition approved July
13、10,1999.Published September 1999.Originallypublished as A 47 84.Last previous edition A 47 90(1995).2For ASME Boiler and Pressure Vessel Code applications see related Specifi-cation SA-47 in Section II of that code.3Annual Book of ASTM Standards,Vol 01.06.4Annual Book of ASTM Standards,Vol 01.02.5An
14、nual Book of ASTM Standards,Vol 03.01.6Available from Standardization Documents,Order Desk,Building 4,Section D,700 Robbins Ave.,Philadelphia,PA 191115094,Attn:NPODS.1Copyright ASTM,100 Barr Harbor Drive,West Conshohocken,PA 19428-2959,United States.COPYRIGHT American Society for Testing and Materia
15、lsLicensed by Information Handling ServicesCOPYRIGHT American Society for Testing and MaterialsLicensed by Information Handling Servicesthree such specimens shall be cast from a representative ladleof iron either from each batch-melted heat or,in continuousmelting,from each 4-h pour period during wh
16、ich the purchas-ers castings were poured,or as otherwise agreed uponbetween manufacturer and purchaser.7.2.2 All test specimens shall be suitably identified with thedesignation of either the batch-melted heat or the pour periodof a continuous heat.7.2.3 All test specimens shall be heat treated in the sameproduction furnaces and in the same cycles as the castings theyrepresent.However,in those instances wherein the criticalsections of the production castings differ appreciably from thatof the cen