1、Designation: A 532/A 532M 93a (Reapproved 2003)Standard Specification forAbrasion-Resistant Cast Irons1This standard is issued under the fixed designation A 532/A 532M; the number immediately following the designation indicates the yearof original adoption or, in the case of revision, the year of la
2、st revision. A number in 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 specification covers a group of w
3、hite 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 inch-pound units or SI units are tobe regarded separately as the standard. Within the text, SI unitsare shown in brackets. The values stated in each system are notexact equivalents; therefore, each system must be used inde-pendently of the other. Combining val
5、ues from the two systemsmay result in nonconformance with the specification.2. Referenced Documents2.1 ASTM Standards:2E10 Test Method for Brinell Hardness of Metallic Materi-alsE18 Test Methods for Rockwell Hardness and RockwellSuperficial Hardness of Metallic MaterialsE92 Test Method for Vickers H
6、ardness of Metallic Mate-rialsE 350 Test Methods for Chemical Analysis of Carbon Steel,Low-Alloy Steel, Silicon Electrical Steel, Ingot Iron, andWrought IronE 351 Test Methods for Chemical Analysis of Cast IronAll Types3. Ordering Information3.1 Orders for material in this specification should inclu
7、dethe following information:3.1.1 Quantity,3.1.2 Specification number, 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 andstre
8、ss relieved, and3.1.7 Hardness method, Brinell, Rockwell, Vickers (seeSection 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 speci
9、allytreated on any portion, the inquiries and the purchase ordershall 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
10、 relieved,5.1.3 Hardened,5.1.4 Hardened and stress relieved, or5.1.5 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
11、isnot that of final use, it shall be the responsibility of thepurchaser 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 behardene
12、d. If both annealing and machining are to be performedby the manufacturer, 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 Commit
13、tee A04 on IronCastings and is the direct responsibility of SubcommitteeA04.01 on Grey and WhiteIron Castings.Current edition approved Dec. 1, 2003. Published December 2003. Originallyapproved in 1965. Last previous edition approved in 1999 as A 53293a (1999)e1.2For referenced ASTM standards, visit
14、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.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959
15、, United States.condition, 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 rangesprescribed in Table 1 for that class an
16、d 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-cation.6.3 In case of dispute, umpire determi
17、nations 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 MethodsE 351:6.3.1.1 Carbon, Total by the Combustion GravimetricMethod.6.3.1.2 Chromium by the Poroxydisulfate-Oxidation Titri-metric Method.6.3.
18、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 PhotometricMethod.6.3.1.7 Sulfur by the Combustion-Iod
19、ate Titration Method.6.3.2 The following is in accordance with Test MethodsE 350:6.3.2.1 Molybdenum by the Photometric Method.7. Microstructure7.1 The alloys covered by this specification are expected tohave microstructures that consist essentially of carbides, mar-tensite, bainite, austenite; and i
20、n 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 Requirements Hardness Requirements8.1 The castings sh
21、all 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 specified by the p
22、urchaser: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. Keywords10.1 abrasion resistant; alloyed cast iron; cast iron; whitecast
23、 ironTABLE 1 Chemical Requirements, Weight %Class 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
24、maxI C Ni-Cr-GB 2.53.7 2.0 max 0.8 max 4.0 max 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 1
25、4.018.0 3.0 max 1.2 max 0.10 max 0.06 maxII D 20 % 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 maxA 532/A 532M 93a (2003)2TABLE2HardnessRequirementsHardnessValue-HBSandCast,minAClass
26、TypeDesignationAsCastorAsCastandStressRelievedHardenedorHardenedandStressRelievedChillCast,minBSoftened,maxTypicalSectionThicknessLevel1Level2HBHRCHVHBHRCHVHBHRCHVHBHRCHVHBHRCHVIANi-Cr-HiC55053600600566606505971560056660.IBNi-Cr-LoC55053600600566606505971560056660.ICNi-Cr-GB5505360060056660650597156
27、005666040041430.IDNi-HiCr50050540600566606505971555053600.IIA12%Cr5505360060056660650597155505360040041430.IIB15%Cr-Mo450464856005666065059715.40041430.IID20%Cr-Mo450464856005666065059715.40041430.IIIA25%Cr450464856005666065059715.40041430.A90%oftheminimumsurfacehardnesslevelshallbemaintainedtoadept
28、hof40%ofthecastingsection,withanysoftermaterialbeingatthethermalcenterofthecasting.Asamplingprocedureshouldbeestablishedbyagreementbetweenthesupplierandthepurchaser.BNon-chilledareasofcastingshallmeetminimumhardnessorsandcastrequirements.A 532/A 532M 93a (2003)3ASTM International takes no position r
29、especting the validity of any patent rights asserted 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.Thi
30、s standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM Inte
31、rnational Headquarters. Your comments will receive careful 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
32、below.This standard is copyrighted by ASTM International, 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).A 532/A 532M 93a (2003)4
