1、Designation: B427 09Standard Specification forGear Bronze Alloy Castings1This standard is issued under the fixed designation B427; 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 i
2、ndicates the year of last reapproval. Asuperscript 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. Scope*1.1 This specification2establishes requirements for alloyswhose copper alloy num
3、bers and nominal compositions areshown in Table 1. The castings may be furnished as one ofthree types: static chill, centrifugal chill, or sand cast.1.2 The values stated in inch-pound units are to be regardedas the standard. SI values given in parentheses are for infor-mation purposes only.2. Refer
4、enced Documents2.1 ASTM Standards:3B208 Practice for Preparing Tension Test Specimens forCopper Alloy Sand, Permanent Mold, Centrifugal, andContinuous CastingsB824 Specification for General Requirements for CopperAlloy CastingsB846 Terminology for Copper and Copper AlloysB950 Guide for Editorial Pro
5、cedures and Form of ProductSpecifications for Copper and Copper AlloysE8 Test Methods for Tension Testing of Metallic MaterialsE10 Test Method for Brinell Hardness of Metallic MaterialsE527 Practice for Numbering Metals and Alloys in theUnified Numbering System (UNS)3. General Requirements3.1 The fo
6、llowing sections of Specification B824 constitutea part of this specification.3.1.1 Terminology3.1.2 Materials and Manufacture3.1.3 Sampling3.1.4 Number of Tests and Retests3.1.5 Specimen Preparation3.1.6 Certification3.1.7 Test Reports3.2 In addition, when a section with a title identical to thatre
7、ferenced in 3.1, above, appears in this specification, itcontains additional requirements which supplement those ap-pearing in Specification B846.4. Terminology4.1 For definitions of terms related to copper and copperalloys, refer to Terminology B846.5. Ordering Information5.1 Include the following
8、information when placing ordersfor product under this specification:5.1.1 Quantity of castings required,5.1.2 Copper Alloy UNS No. (Table 1),5.1.3 Specification title, number, and year of issue,5.1.4 Pattern or drawing number and casting type (Section1),5.1.5 Repair of castings (Section 9),5.1.6 Cer
9、tification, if specified in the purchase order (Speci-fication B824),5.1.7 Foundry test report, if specified in the purchase order(Specification B824), and5.1.8 Witness inspection, if specified in the purchase order(Specification B824).5.2 When product is purchased for agencies of the U.S.Government
10、, the Supplementary Requirements of Specifica-tion B824 may be specified.1This specification is under the jurisdiction ofASTM Committee B05 on Copperand Copper Alloys and is the direct responsibility of Subcommittee B05.05 onCastings and Ingots for Remelting.Current edition approved Oct. 1, 2009. Pu
11、blished November 2009. Originallyapproved in 1965. Discontinued June 2002 and reinstated as B427 02. Lastprevious edition approved in 2002 as B427 02. DOI: 10.1520/B0427-09.2The UNS system for copper and copper alloys (see Practice E527) is a simpleexpansion of the former standard designation system
12、 accomplished by the additionof a prefix “C” and a suffix “00.” The suffix can be used to accommodatecomposition variations of the base alloy.3For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards vol
13、ume information, refer to the standards Document Summary page onthe ASTM website.TABLE 1 Nominal CompositionCopperAlloyUNS No.PreviouslyUsedDesignationComposition, %Copper Tin Nickel LeadPhos-phorusC90800 A 87.8 12.0 . 0 0.2C91700 B 86.3 12.0 1.5 0 0.2C90700 . 87.8 11.0 . 0 0.2C91600 C 88.0 10.3 1.5
14、 0 0.2C92900 D 83.5 10.0 3.5 2.8 0.21*A Summary of Changes section appears at the end of this standard.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.6. Chemical Composition6.1 The castings shall conform to the requirements as tochem
15、ical composition requirements prescribed in Table 2 forthe alloy specified.6.2 These specification limits do not preclude the presenceof other elements. Limits may be established by agreementbetween manufacturer or supplier and purchaser for theseunnamed elements. Copper may be given as remainder an
16、dmay be taken as the difference between the sum of all elementsanalyzed and 100 %. When all the named elements in Table 2are analyzed, their sum shall be as specified in Table 3.7. Mechanical Property Requirements7.1 Mechanical properties shall be determined from sepa-rately cast test bar castings a
17、nd shall meet the requirementsshown in Table 4.8. Dimensions, Mass, and Permissible Variations8.1 Variations in dimensions and weights shall be as agreedupon between the producer and the consumer but shall not bemore than 3 % in the as-cast condition.8.2 The manufacturer shall not be responsible for
18、 thedimensional accuracy of patterns or molds furnished by thepurchaser.9. Casting Repair9.1 The castings shall not be repaired, plugged, welded, orburned-in without the written approval of the purchaser.10. Sampling10.1 Test bar casting representing sand castings in theCopperAlloy UNS Nos. under th
19、is specification shall be cast tothe form and dimensions shown in Figs. 2, Figs. 3, or Figs. 4of Practice B208.10.2 Test bar castings representing castings produced inchill molds of metal or graphite may be cast in open keel-blockmolds of the same material as the molds used for the castings.10.3 Sep
20、arate centrifugally cast test bars shall be made inaccordance with Practice B208.10.4 At the manufacturers option test bar specimens maybe removed from centrifugal castings instead of separatecentrifugally cast test coupons (10.3).11. Number of Tests11.1 One Brinell hardness reading shall be made fo
21、r each lotof castings.12. Test Methods12.1 Brinell readings shall be taken on the grip end of thetension test bar, at or within 1 in. (25.4 mm) of the castingoutside diameter, or as indicated on the purchasers drawingand shall be made in accordance with Test Method E10.13. Certification13.1 In the c
22、ase of a product manufactured in advance andsupplied for sale from stock by the manufacturer, jobber orother dealer, the product may upon request of the purchaser becertified by the manufacturer as conforming to this specifica-tion subject to the following procedure. Not less than twotension tests,
23、and two hardness tests, from different heats, andnot less than one chemical analysis shall be made by themanufacturer from each days melt. Records of the tension testresults, hardness, and chemical analysis shall be systematicallymade and maintained and shall be the basis for certification. Inlieu o
24、f the manufacturers certification and upon writtenrequest by the purchaser, these records may be examined on themanufacturers premises by the purchaser or his accreditedrepresentative.14. Keywords14.1 bronze castings; copper-base castings; gear castings;gear bronzeTABLE 2 Chemical RequirementsElemen
25、tComposition, max % (Unless Shown as a Range or Minimum) Copper Alloy UNS No.C90800AC91700AC90700AC91600AC92900ACopper 85.089.0B84.087.0B88.090.0B86.089.0B82.086.0BTin 11.013.0 11.312.5 10.012.0 9.710.8 9.011.0Lead 0.25 0.25 0.50 0.25 2.03.2Zinc 0.25 0.25 0.50 0.25 0.25Iron 0.15 0.20 0.15 0.20 0.20A
26、ntimony 0.20 0.20 0.20 0.20 0.25Nickel (incl. cobalt) 0.50 1.22.0 0.50 1.22.0 2.84.0Sulfur 0.05 0.05 0.05 0.05 0.05Phosphorus 0.30 0.30 0.30 0.30 0.50Aluminum 0.005 0.005 0.005 0.005 0.005Silicon 0.005 0.005 0.005 0.005 0.005AIngot for remelting specifications vary from the ranges shown.BIn determin
27、ing Cu min., Cu may be calculated as Cu + Ni.TABLE 3 Copper Plus Sum of All Named Elements AnalyzedCopper AlloyUNS No.Copper Plus NamedElements, % minC90800 99.4C91700 99.4C90700 99.4C91600 99.4C92900 99.3B427 092APPENDIX(Nonmandatory Information)X1. METRIC EQUIVALENTSX1.1 The SI unit for strength p
28、roperties now shown is inaccordance with the International System of Units (SI). Thederived SI unit for force is the newton (N), which is defined asthat force which when applied to a body having a mass of onekilogram gives it an acceleration of one metre per secondsquared (N = kgm/s2). The derived S
29、I unit for pressure orstress is the newton per square metre (N/m2), which has beennamed the pascal (Pa) by the General Conference on Weightsand Measures. Since 1 ksi = 6 894 757 Pa the metric equiva-lents are expressed as megapascal (MPa), which is the same asMN/m2and N/mm2.SUMMARY OF CHANGESCommitt
30、ee B05 has identified the principal changes to this specification that have been incorporated since the2002 issue as follows:(1) General editorial modifications were made to incorporatecurrent practices of form and style and in conformance withGuide B950.(2) A Terminology Section was added.(3) A mor
31、e detailed General Requirements Section was added.(4) Clarifications to Table 2, Chemical Composition, weremade.ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advis
32、ed 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 reviewed every five years andif not revised, either r
33、eapproved 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 theresponsible technical committee, which you may attend. If
34、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, West Conshohocken, PA 19428-2959,United States. Individu
35、al 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).TABLE 4 Mechanical RequirementsANOTE 1The properties of a separate ca
36、st test specimen shall meet the following minimum values:Copper Alloy UNS Nos. C90700,C90800, C91700Copper Alloy UNS No.C91600Copper Alloy UNS Nos.C90700, C90800, C91600,C91700Copper Alloy UNS No.C92900Static or Centrifugally Chill Cast,ksiB(MPa)CStatic or Centrifugally ChillCast, ksiB(MPa)CSand Cas
37、t, ksiB(MPa)CSand or Chill Cast, ksiB(MPa)CTensile strength, min 50 (345) 45 (310) 35 (241) 45 (310)Yield strength, at 0.5 % extension, min 28 (193) 25 (172) 17 (117) 25 (172)Elongation in 2 in. (50.8 mm), min, % 12 10 10 8Brinell-500 kg on bar or casting, min 95 85 65 75ATest taken in accordance with Test Methods E8.Bksi = 1000 psi.CSee Appendix X1.B427 093
