1、Designation: A532/A532M 10 (Reapproved 2014)Standard Specification forAbrasion-Resistant Cast Irons1This standard is issued under the fixed designation A532/A532M; the number immediately following the designation indicates the yearof original adoption or, in the case of revision, the year of last re
2、vision. 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. Scope1.1 This specification covers a group of wh
3、ite cast irons thathave been alloyed to secure high resistance to abrasive wear inthe applications of the mining, milling, earth-handling, andmanufacturing industries.1.2 Simple and low-alloy white cast irons that consistessentially of iron carbides and pearlite are specifically ex-cluded from this
4、specification.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-co
5、nformancewith the standard.2. Referenced Documents2.1 ASTM Standards:2E10 Test Method for Brinell Hardness of Metallic MaterialsE18 Test Methods for Rockwell Hardness of Metallic Ma-terialsE92 Test Method for Vickers Hardness of Metallic Materials(Withdrawn 2010)3E350 Test Methods for Chemical Analy
6、sis of Carbon Steel,Low-Alloy Steel, Silicon Electrical Steel, Ingot Iron, andWrought IronE351 Test Methods for Chemical Analysis of Cast IronAllTypes3. Ordering Information3.1 Orders for material in this specification should includethe following information:3.1.1 Quantity,3.1.2 Specification number
7、, class, and type,3.1.3 Description of the casting, pattern number, or drawing,3.1.4 Chilling of the casting, if required (see 4.2),3.1.5 Heat treat condition (see 5.1),3.1.6 Hardness level, if supplied hardened or hardened andstress relieved, and3.1.7 Hardness method, Brinell, Rockwell, Vickers (se
8、eSection 9). If the hardness method is not specified, it shall beat the manufacturers option.4. Method of Manufacture4.1 These alloys may be made by any suitable meltingprocess.4.2 If the casting is to be chilled or otherwise speciallytreated on any portion, the inquiries and the purchase ordershall
9、 so state and a properly marked drawing of the casting willaccompany both the inquiry and the purchase order.5. Heat Treatment5.1 The casting will be supplied in one of the followingconditions:5.1.1 As-cast,5.1.2 As-cast and stress relieved,5.1.3 Hardened,5.1.4 Hardened and stress relieved, or5.1.5
10、Softened for machining.5.2 Unless otherwise specified by the purchaser, the manu-facturer shall supply the castings in the heat treatment hedeems best for the application.5.3 If the heat treatment specified for delivered condition isnot that of final use, it shall be the responsibility of thepurchas
11、er to provide the additional heat treatment.5.4 Class II and Class III alloys are frequently ordered in theannealed condition with a maximum hardness of 400 HB.Aftermachining operations are performed the castings may then behardened. If both annealing and machining are to be performedby the manufact
12、urer, as specified in the inquiry, contract, ororder, the purchaser may then specify delivery in the hardenedcondition. If the purchaser specifies delivery in the annealed1This specification is under the jurisdiction of ASTM Committee A04 on IronCastings and is the direct responsibility of Subcommit
13、tee A04.01 on Grey and WhiteIron Castings.Current edition approved Oct. 1, 2014. Published October 2014. Originallyapproved in 1965. Last previous edition approved in 2010 as A532/A532M 10.DOI: 10.1520/A0532_A0532M-10R14.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact
14、 ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3The last approved version of this historical standard is referenced onwww.astm.org.Copyright ASTM International, 100 Barr Harbor Drive, PO
15、Box C700, West Conshohocken, PA 19428-2959. United States1condition, subsequent hardening (and stress-relief, if it isdesired) is the responsibility of the purchaser.6. Chemical Composition6.1 The composition of the metal of a class and typeproduced under this specification shall fall within the ran
16、gesprescribed in Table 1 for that class and type.6.2 Spectrographic, X-ray, or wet chemical laboratory tech-niques are acceptable for routine and control determinations,but shall be standardized against, and give essentially the sameresults as, the umpire methods specified in 6.3 of this specifi-cat
17、ion.6.3 In case of dispute, umpire determinations of the chemi-cal analysis of the metal shall be made using ASTM standardmethods detailed as follows:6.3.1 The following is in accordance with Test MethodsE351:6.3.1.1 Carbon, Total by the Combustion GravimetricMethod.6.3.1.2 Chromium by the Poroxydis
18、ulfate-Oxidation Titri-metric Method.6.3.1.3 Copper by the Sulfide Precipitation-Electrodeposition Gravimetric Method.6.3.1.4 Manganese by the Peroxydisulfate-Arsenite Titri-metric Method.6.3.1.5 Nickel by the Dimethylglyoxime GravimetricMethod.6.3.1.6 Phosphorus by the Molybdenum Blue PhotometricMe
19、thod.6.3.1.7 Sulfur by the Combustion-Iodate Titration Method.6.3.2 The following is in accordance with Test MethodsE350:6.3.2.1 Molybdenum by the Photometric Method.7. Microstructure7.1 The alloys covered by this specification are expected tohave microstructures that consist essentially of carbides
20、,martensite, bainite, austenite; and in exceptional cases minoramounts of graphite or pearlite.7.2 The microstructure will not be routinely determined norreported except in accordance with special agreement betweenthe manufacturer and the purchaser, or in cases of dispute.8. Hardness Requirements8.1
21、 The castings shall conform to the hardness requirementsspecified in Table 2.8.2 The hardness test shall be performed on the originalsurface of the casting or up to18 in. (3 mm) below that surface.9. Hardness Method9.1 Perform the hardness test in accordance with one of thefollowing methods to be sp
22、ecified by the purchaser:9.1.1 Test Method E10 (Brinell) using a tungsten carbideball and 3000 kgf load,9.1.2 Test Method E18 (Rockwell) using a diamond conepenetrator, 150 kgf load, and the Rockwell C Scale, or9.1.3 Test Method E92 (Vickers).10. Quality10.1 The surface of the casting shall be free
23、of adheringsand, scale, cracks, and hot tears as determined by visualexamination. Other surface discontinuities shall meet the visualacceptance standards specified in the order.11. Keywords11.1 abrasion resistant; alloyed cast iron; cast iron; whitecast ironTABLE 1 Chemical Requirements, Weight %Cla
24、ss Type Designation Carbon Manganese Silicon Nickel Chromium Molyb-denumCopper Phos-phorusSulfurI A Ni-Cr-Hc 2.83.6 2.0 max 0.8 max 3.35.0 1.44.0 1.0 max . . . 0.3 max 0.15 maxI B Ni-Cr-Lc 2.43.0 2.0 max 0.8 max 3.35.0 1.44.0 1.0 max . . . 0.3 max 0.15 maxI C Ni-Cr-GB 2.53.7 2.0 max 0.8 max 4.0 max
25、1.02.5 1.0 max . . . 0.3 max 0.15 maxI D Ni-HiCr 2.53.6 2.0 max 2.0 max 4.5-7.0 7.011.0 1.5 max . . . 0.10 max 0.15 maxII A 12 % Cr 2.03.3 2.0 max 1.5 max 2.5 max 11.014.0 3.0 max 1.2 max 0.10 max 0.06 maxII B 15 % Cr-Mo 2.03.3 2.0 max 1.5 max 2.5 max 14.018.0 3.0 max 1.2 max 0.10 max 0.06 maxII D 2
26、0 % Cr-Mo 2.03.3 2.0 max 1.02.2 2.5 max 18.023.0 3.0 max 1.2 max 0.10 max 0.06 maxIII A 25 % Cr 2.03.3 2.0 max 1.5 max 2.5 max 23.030.0 3.0 max 1.2 max 0.10 max 0.06 maxA532/A532M 10 (2014)2TABLE2HardnessRequirementsHardnessValue-HBSandCast,minAClassTypeDesignationAsCastorAsCastandStressRelievedHard
27、enedorHardenedandStressRelievedChillCast,minBSoftened,maxTypicalSectionThicknessLevel1Level2HBHRCHVHBHRCHVHBHRCHVHBHRCHVHBHRCHVIANi-Cr-HiC55053600600566606505971560056660.IBNi-Cr-LoC55053600600566606505971560056660.ICNi-Cr-GB5505360060056660650597156005666040041430.IDNi-HiCr5005054060056660650597155
28、5053600.IIA12%Cr5505360060056660650597155505360040041430.IIB15%Cr-Mo450464856005666065059715.40041430.IID20%Cr-Mo450464856005666065059715.40041430.IIIA25%Cr450464856005666065059715.40041430.A90%oftheminimumsurfacehardnesslevelshallbemaintainedtoadepthof40%ofthecastingsection,withanysoftermaterialbei
29、ngatthethermalcenterofthecasting.Asamplingprocedureshouldbeestablishedbyagreementbetweenthesupplierandthepurchaser.BNon-chilledareasofcastingshallmeetminimumhardnessorsandcastrequirements.A532/A532M 10 (2014)3ASTM International takes no position respecting the validity of any patent rights asserted
30、in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the
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32、reful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM Internatio
33、nal, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the Copyright Clearance Center, 222Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600; http:/ 10 (2014)4
