1、Designation: A532/A532M 10Standard 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 revision. A number i
2、n 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 Department of Defense.1. Scope1.1 This specification covers a group of white cast irons thathave
3、 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 specification.1.3 The v
4、alues 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 stand
5、ard.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 Materi-alsE350 Test Methods for Chemical Analysis of Carbon Steel,Low-Alloy Steel, Si
6、licon Electrical Steel, Ingot Iron, andWrought IronE351 Test Methods for Chemical Analysis of Cast IronAll Types3. Ordering Information3.1 Orders for material in this specification should includethe following information:3.1.1 Quantity,3.1.2 Specification number, class, and type,3.1.3 Description of
7、 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 (seeSection 9). If the hardness method is
8、 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 so state and a properly marked drawin
9、g 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 Softened for machining.5.2 Unless othe
10、rwise 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 thepurchaser to provide the additional heat trea
11、tment.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 manufacturer, as specified in the inquiry, con
12、tract, 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 SubcommitteeA04.01 on Grey and WhiteIron Castin
13、gs.Current edition approved April 1, 2010. Published May 2010. Originallyapproved in 1965. Last previous edition approved in 2008 as A532/A532M 93a(2008). DOI: 10.1520/A0532_A0532M-10.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm
14、.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, United States.condition, subsequent hardening (and stress-relief, if it isde
15、sired) 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 and type.6.2 Spectrographic, X-ray, or wet chemical laboratory tech-niques are a
16、cceptable 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 determinations of the chemi-cal analysis of the metal shall be made using ASTM standa
17、rdmethods 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 Poroxydisulfate-Oxidation Titri-metric Method.6.3.1.3 Copper by the Sulfide Precipitation-Electrodeposition Gravimetric Method.6.
18、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-Iodate Titration Method.6.3.2 The following is in accordance with Test MethodsE350
19、: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 in exceptional cases minoramounts of graphite or pearlite.7.2 The microstructure
20、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 shall conform to the hardness requirementsspecified in Table 2.8.2 The hardness te
21、st 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 purchaser:9.1.1 Test Method E10 (Brinell) using a tungsten carbideball and 3000 k
22、gf 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 of adheringsand, scale, cracks, and hot tears as determined by visualexamination. Other surface
23、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 %Class Type Designation Carbon Manganese Silicon Nickel Chromium Molyb-denumCopper Phos-phorusSulfur
24、I 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 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
25、. . . 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 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
26、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 102TABLE 2 Hardness RequirementsHardness Value-HBSand Cast, minAClass Type Designation As Cast or As Cast and StressRelievedHardened or Hardened and Stress Relieved Chill Cast, minBSoftened, max TypicalSectionThickne
27、ssLevel 1 Level 2HB HRC HV HB HRC HV HB HRC HV HB HRC HV HB HRC HVI A Ni-Cr-HiC 550 53 600 600 56 660 650 59 715 600 56 660 . . . . . . . . . . . .I B Ni-Cr-LoC 550 53 600 600 56 660 650 59 715 600 56 660 . . . . . . . . . . . .I C Ni-Cr-GB 550 53 600 600 56 660 650 59 715 600 56 660 400 41 430 . .
28、.I D Ni-HiCr 500 50 540 600 56 660 650 59 715 550 53 600 . . . . . . . . . . . .II A 12 % Cr 550 53 600 600 56 660 650 59 715 550 53 600 400 41 430 . . .II B 15 % Cr-Mo 450 46 485 600 56 660 650 59 715 . . . . . . . . . 400 41 430 . . .II D 20 % Cr-Mo 450 46 485 600 56 660 650 59 715 . . . . . . . .
29、 . 400 41 430 . . .III A 25 % Cr 450 46 485 600 56 660 650 59 715 . . . . . . . . . 400 41 430 . . .A90 % of the minimum surface hardness level shall be maintained to a depth of 40 % of the casting section, with any softer material being at the thermal center of the casting. Asampling procedure shou
30、ld be establishedby agreement between the supplier and the purchaser.BNon-chilled areas of casting shall meet minimum hardness or sand cast requirements.A532/A532M103ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin thi
31、s 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 responsible technical committee and must be
32、 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 International Headquarters. Your comments will receive careful consideration at a meeting of theresp
33、onsible 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 International, 100 Barr Harbor Drive, PO Box C700, We
34、st 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 ASTM website (www.astm.org/COPYRIGHT/).A532/A532M 104
