1、Designation: B 427 02Standard Specification forGear Bronze Alloy Castings1This standard is issued under the fixed designation B 427; 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
2、 indicates the year of last reapproval. Asuperscript 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. Scope *1.1 This specification2establishes requirements for alloyswhose copper alloy
3、 numbers 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. Metric values given in parentheses are forinformation purposes only.2.
4、 Referenced Documents2.1 The following documents of the issue in effect on dateof material purchase form a part of this specification to theextent referenced herein:2.1 ASTM Standards:B 208 Practice for Preparing Tension Test Specimens forCopper-Base Alloys for Sand, Permanent Mold, Centrifu-gal, an
5、d Continuous Castings3B 824 Specification for General Requirements for CopperAlloy Castings3E 8 Test Methods of Tension Testing of Metallic Materials4E 10 Test Method for Brinell Hardness of Metallic Materi-als4E 527 Practice for Numbering Metals and Alloys (UNS)53. Ordering Information3.1 Orders fo
6、r material to this specification shall include thefollowing information:3.1.1 Quantity of castings required,3.1.2 Copper Alloy UNS No. (Table 1),3.1.3 Specification title, number, and year of issue,3.1.4 Pattern or drawing number and casting type (Section1),3.1.5 Repair of castings (Section 7),3.1.6
7、 Certification, if specified in the purchase order (Speci-fication B 824),3.1.7 Foundry test report, if specified in the purchase order(Specification B 824), and3.1.8 Witness inspection, if specified in the purchase order(Specification B 824).3.2 When material is purchased for agencies of the U.S.Go
8、vernment, the Supplementary Requirements of Specifica-tion B 824 may be specified.4. Chemical Composition4.1 The castings shall conform to the requirements as tochemical composition prescribed in Table 2.4.2 These specification limits do not preclude the presenceof other elements. Limits may be esta
9、blished by agreementbetween manufacturer or supplier and purchaser for theseunnamed elements. Copper may be given as remainder andmay 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 T
10、able 3.5. Mechanical Properties5.1 Mechanical properties shall be determined from sepa-rately cast test bar castings and shall meet the requirementsshown in Table 4.6. Dimensions, Weights, and Permissible Variations6.1 Variations in dimensions and weights shall be as agreedupon between the producer
11、and the consumer but shall not bemore than 3 % in the as-cast condition.1This specification is under the jurisdiction of ASTM Committee B05 on Copperand Copper Alloys and is the direct responsibility of Subcommittee B05.05 onCastings and Ingots for Remelting.Current edition approved Dec. 10, 2002. P
12、ublished February 2003. Originallyapproved in 1965. Discontinued June 2002 and reinstated as B 427 02. Lastprevious edition approved in 1993 as B 427 93a.2The UNS system for copper and copper alloys (see Practice E 527) is a simpleexpansion of the former standard designation system accomplished by t
13、he additionof a prefix “C” and a suffix “00.” The suffix can be used to accommodatecomposition variations of the base alloy.3Annual Book of ASTM Standards, Vol 02.01.4Annual Book of ASTM Standards, Vol 03.01.5Annual Book of ASTM Standards, Vol 01.01.TABLE 1 Nominal CompositionCopperAlloyUNS No.Previ
14、ouslyUsedDesignationComposition, %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 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
15、, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.6.2 The manufacturer shall not be responsible for thedimensional accuracy of patterns or molds furnished by thepurchaser.7. Casting Repair7.1 The castings shall not be repaired, plugged, welded, orburned-in without
16、 the written approval of the purchaser.8. General Requirements8.1 Material furnished under this specification shall con-form to the applicable requirements of Specification B 824.9. Sampling9.1 Test bar casting representing sand castings in the CopperAlloy UNS Nos. under this specification shall be
17、cast to theform and dimensions shown in Figs. 2, Figs. 3, or Figs. 4 ofPractice B 208.9.2 Test bar castings representing castings produced in chillmolds of metal or graphite may be cast in open keel-blockmolds of the same material as the molds used for the castings.9.3 Separate centrifugally cast te
18、st bars shall be made inaccordance with Practice B 208.9.4 At the manufacturers option test bar specimens may beremoved from centrifugal castings instead of separate centrifu-gally cast test coupons (9.3).10. Number of Tests10.1 One Brinell hardness reading shall be made for each lotof castings.11.
19、Test Methods11.1 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 E 10.12. Certification12.1 In the case of a product manufact
20、ured 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, and two hardness tests, f
21、rom 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 of the manufacturers certi
22、fication and upon writtenrequest by the purchaser, these records may be examined on themanufacturers premises by the purchaser or his accreditedrepresentative.13. Keywords13.1 bronze castings; copper-base castings; gear castingsTABLE 2 Chemical RequirementsElementComposition, max % (Unless Shown as
23、a Range or Minimum) Copper Alloy UNS No.C90800AC91700AC90700AC91600AC92900ACopper remainder remainder remainder remainder remainderTin 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 0.20Antimony 0.20 0.20 0.20 0.20 0.25N
24、ickel 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.TABLE 3 Copper Plus Sum of All Named Elements AnalyzedCopper
25、 AlloyUNS No.Copper Plus NamedElements, % minC90800 99.4C91700 99.4C90700 99.4C91600 99.4C92900 99.3B427022APPENDIX(Nonmandatory Information)X1. METRIC EQUIVALENTSX1.1 The SI unit for strength properties now shown is inaccordance with the International System of Units (SI). Thederived SI unit for fo
26、rce 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 SI unit for pressure orstress is the newton per square metre (N/m2), which has beennamed the pascal (Pa) by
27、 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 CHANGESCommittee B05 has identified the location of selected changes to this standard since the last issue that mayimpac
28、t the use of this standard.(1) Paragraph 1.1 was rewritten.(2) The entire specification was revised to comply withSpecification B 824.ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standa
29、rd 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 reviewed every five years andif
30、 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 theresponsible technical committee, whi
31、ch 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, West Conshohocken, PA 19428-2959,U
32、nited 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).TABLE 4 Mechanical RequirementsANOTE 1The prope
33、rties of a separate cast 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 ChillCa
34、st, ksiB(MPa)CSand Cast, 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 E 8.Bksi = 1000 psi.CSee Appendix X1.B427023
