1、Designation: B 770 08Standard Specification forCopper-Beryllium Alloy Sand Castings for GeneralApplications1This standard is issued under the fixed designation B 770; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last
2、 revision. A number in parentheses 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 specification establishes requirem
3、ents for copper-beryllium alloy sand castings for general applications andnominal compositions alloys defined by this specification areshown in Table 1.21.2 UnitsThe values stated in inch-pound units are to beregarded as standard. The values given in parentheses aremathematical conversions to SI uni
4、ts that are provided forinformation only and are not considered standard.1.3 The following safety hazard caveat pertains only to thetest methods described in this specification: This standard doesnot purport to address all of the safety concerns, if any,associated with its use. It is the responsibil
5、ity of the user of thisstandard to establish appropriate safety and health practicesand determine the applicability of regulatory requirementsprior to use.2. Referenced Documents2.1 The following documents in the current issue of theBook of Standards form a part of this specification to the extentre
6、ferenced herein:2.2 ASTM Standards:3B30 Specification for Copper Alloys in Ingot FormB 208 Practice for Preparing Tension Test Specimens forCopper Alloy Sand, Permanent Mold, Centrifugal, andContinuous CastingsB 601 Classification for Temper Designations for Copperand Copper AlloysWrought and CastB
7、824 Specification for General Requirements for CopperAlloy CastingsB 846 Terminology for Copper and Copper AlloysE 527 Practice for Numbering Metals and Alloys in theUnified Numbering System (UNS)3. General Requirements3.1 The following sections of Specification B 824 constitutea part of this specif
8、ication:3.1.1 Terminology,3.1.2 Material and Manufacture,3.1.3 Chemical Composition,3.1.4 Dimensions and Permissible Variations,3.1.5 Workmanship, Finish and Appearance,3.1.6 Sampling,3.1.7 Number of Tests and Retests,3.1.8 Specimen Preparation,3.1.9 Test Methods,3.1.10 Significance of of Numerical
9、Limits,3.1.11 Inspection,3.1.12 Rejection and Rehearing,3.1.13 Certification,3.1.14 Mill Test Report, and3.1.15 Packaging and Package Marking.3.2 In addition, when a section with a title identical to thatreferenced in 3.1 appears in this specification, it containsadditional requirements which supple
10、ment those appearing inSpecification B 824.4. Terminology4.1 For definitions of terms relating to copper and copperalloys, refer to Terminology B 846.5. Ordering Information5.1 Include the following information for orders for prod-uct:5.1.1 ASTM designation number, title, and year of issue,1This spe
11、cification 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 April 1, 2008. Published April 2008. Originallyapproved in 1987. Last previous edition approved in
12、 2005 as B 770 05.2The UNS system for copper and copper alloys (see Practice E 527) is a simpleexpansion of the former standard designation system accomplished by the additionof a prefix “C” and a suffix “00”. The suffix can be used to accommodatecomposition variations of the base alloy.3For referen
13、ced ASTM standards, visit 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.1*A Summary of Changes section appears at the end of this standard.Copyri
14、ght ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.5.1.2 Copper Alloy UNS Number designation,5.1.3 Temper,5.1.4 Quantity of castings required,5.1.5 Pattern or drawing number, and condition (cast, ma-chined, and so forth),5.1.6 When material is
15、 purchased for agencies of the U.S.government, the Supplementary Requirements of SpecificationB 824 may be specified.5.2 The following options are available and should bespecified in the contract or purchase order when required.5.2.1 Chemical analysis of residual elements, if specified inthe purchas
16、e order (Specification B 824),5.2.2 Mechanical requirements, if specified in the purchaseorder (Section 10),5.2.3 Pressure test requirements, if specified in the purchaseorder (Specification B 824),5.2.4 Soundness requirements, if specified in the purchaseorder (Specification B 824),5.2.5 Repair of
17、castings (Section 12),5.2.6 Certification, if specified in the purchase order (Speci-fication B 824),5.2.7 Foundry test report, if specified in the purchase order(Specification B 824),5.2.8 Witness inspection, if specified in the purchase order(Specification B 824), and5.2.9 Product marking, if spec
18、ified in the purchase order(Specification B 824).6. Materials and Manufacture6.1 MaterialThe material of manufacture shall be cast-ings of the copper alloys listed in Table 1, as specified in thepurchase order or contract, and of such purity and soundness asto be suitable for the products prescribed
19、 herein.6.2 ManufactureThe product shall be manufactured bycasting and thermal treatment to meet the properties specified.7. Chemical Composition7.1 The castings shall conform to the chemical compositionrequirements prescribed in Table 2 for the Copper Alloy UNSNumber designations specified in the o
20、rdering information.7.2 These composition limits do not preclude the presenceof other elements. Limits may be established for unnamedelements by agreement between manufacturer or supplier andpurchaser.7.3 Copper is customarily given as remainder but may betaken as the difference between the sum of a
21、ll elementsanalyzed and 100 %.7.4 When all elements in Table 2 are analyzed, their sumshall be 99.5 % minimum.7.5 It is recognized that residual elements may be present incast copper-base alloys. Analysis shall be made for residualelements only when specified in the purchase order (Specifi-cation B
22、824).8. Temper8.1 The standard tempers are listed as follows:8.1.1 TF00Cast, solution heat treated and precipitationheat treated.8.1.2 M01As sand cast.8.1.3 Special or non-standard tempers are subject to nego-tiation between the supplier and purchaser. Standard temperdesignations are in accordance w
23、ith Classification B 601.9. Precipitation Heat Treatment9.1 For the purpose of determining conformance to theappropriate requirement in Table 3, the castings and testspecimens shall be precipitation heat-treated at a uniformtemperature from the solution heat-treated condition. Solutionheat-treatment
24、 and precipitation heat-treatments are listed inTable 4. Other treatment times and temperatures may bepreferable for end products made from this material.9.2 Special combinations of properties such as increasedductility, electrical conductivity, dimensional accuracy, andendurance life may be obtaine
25、d by special precipitation heat-treatments. The mechanical requirements of Table 3 do notapply to such special heat-treatments. Specific test require-ments as needed shall be agreed upon between the manufac-turer or supplier and purchaser of the end product.10. Mechanical Property Requirements10.1 W
26、hen tension tests are required, separately cast test-barspecimens shall be used to determine mechanical propertiesand shall meet the requirements shown in Table 3 in the as castor solution heat-treated and precipitation heat-treated condi-tion.11. Purchases for U. S. Government11.1 When specified in
27、 the contract or purchase order,product purchased for an agency of the U. S. government shallconform to the special government regulations specified in theSpecial Requirements.12. Casting Repair12.1 The castings shall not be weld repaired without ap-proval of the purchaser.TABLE 1 Nominal Compositio
28、nsCopper AlloyUNS No.PreviousDesignationCopper Nickel Silicon Beryllium Cobalt Chromium Iron Zirconium Tin ManganeseC81400 70C 99.1 . . 0.06 . 0.8 . . . .C82000 10C 97 . . 0.5 2.5 . . . . .C82200 3C, 14C 98 2.0 . 0.5 . . . . . .C82400A165C, 165CTA97.8 . . 1.7 0.5 . . . . .C82500A20C, 20CTA97.2 . 0.3
29、 2.0 0.5 . . . . .C82510 21C 96.6 . 0.3 2.0 1.1 . . . . .C82600A245C, 245CTA96.8 . 0.3 2.4 0.5 . . . . .C82800A275C, 275CTA96.6 . 0.3 2.6 0.5 . . . . .C96700 72C 67.2 31.0 . 1.2 . . 0.6 0.3 0.3 0.6AWhen fine-grained castings are specified, 0.02 to 0.12 titanium is added for grain refinement, usually
30、 in the remelt ingot. See Specification B30.B770082TABLE2ChemicalRequirementsAComposition,%max,exceptasindicatedMajorElementsResidualElementsCopperAlloyUNSNo.Copper,BminBerylliumCobaltNickelIronSiliconZirco-niumTitaniumChro- miumLeadManga-neseIronSiliconZincChro- miumLeadAlu-mi-numTinC81400remainder
31、0.020.10.0.61.0.C82000remainder0.450.82.402.70C0.20.0.100.150.100.100.020.100.10C82200remainder0.350.80.301.03.0.0.15.C82400Dremainder1.601.850.200.650.20.0.20.0.100.100.020.150.10C82500Dremainder1.902.250.350.70C0.20.0.200.35.0.25.0.100.090.020.150.10C82510remainder1.902.151.01.20.20.0.200.35.0.25.
32、0.100.100.020.150.10C82600Dremainder2.252.550.350.650.20.0.200.35.0.25.0.100.100.020.150.10C82800Dremainder2.502.850.350.70C0.20.0.200.35.0.25.0.100.100.020.150.10C96700remainder1.101.20.29.033.00.401.00.150.150.350.150.35.0.010.401.0.AAnalysisshallregularlybemadeonlyforthemajorelements.Allothersare
33、consideredresidualelements,andifabovethenotedmaximums,mayinfluenceperformanceofthecasting,particularlyinconductivity,magneticpermeability,andmachinability.BInreportingchemicalanalysesobtainedbyuseofinstrumentssuchasspectrograph,X-ray,andatomicabsorption,coppermaybeindicatedas“remainder,”andtakenbydi
34、fference.CNickel+cobalt.DWhenfinegrainedcastingsarespecified,0.020.12titaniumisaddedforgrainrefinement,usuallyintheremeltingot.SeeSpecificationB30.B77008312.2 The castings shall not be impregnated without approvalof the purchaser.13. Sampling13.1 Lot Size:13.1.1 A lot shall consist of all castings p
35、roduced from onefurnace melt or crucible melt.13.1.2 When two or more furnace melts or crucible melts, orboth, are used to charge a ladle for pouring, the castingsproduced therefrom shall constitute a lot.13.1.3 A lot may consist of such groups of melts as agreedupon by the manufacturer and purchase
36、r and in such case a lotshall consist of not more than 1000 lb (455 kg) of castings(gates and risers removed).13.1.4 Test bar specimens for the Copper Alloy UNSNumbers in this specification shall be cast to the form anddimensions shown in Figs. 1, Figs. 2, Figs. 3, or Figs. 4 inPractice B 208.14. Ke
37、ywords14.1 copper alloy castings; copper-base alloy castings; cop-per beryllium castingsTABLE 3 Mechanical RequirementsNOTE 1“TF00” property values denote product in the standard solution heat-treated and precipitation heat-treated condition.NOTE 2“M01” property values denote product in the as sand
38、cast condition.Copper AlloyUNS No.TemperDesignationTensile Strength, min Yield Strength 0.2 % OffsetksiAMPaBksiAMPaBElongation % min in43DCC81400 TF00 53 366 36 248 11C81400 M01 45 311 15 104 15C82000 TF00 90 621 70 483 3C82000 M01 45 311 15 104 15C82200 TF00 90 621 70 483 5C82200 M01 55 380 25 173
39、15C82400 TF00 145 1001 135 932 1C82400 M01 70 483 35 242 15C82500 TF00 150 1035 120 828 1C82500 M01 75 518 40 276 15C82510 TF00 160 1104 150 1035 1C82510 M01 80 552 45 311 10C82600 TF00 165 1139 155 1070 1C82600 M01 80 552 45 311 10C82800 TF00 165 1139 155 1070 1/2C96700 TF00 125 863 80 552 10Aksi =
40、 1000 psi.BSee Appendix.C43D=43 diameter.TABLE 4 Thermal TreatmentsNOTE 1The values given for solution heat treatment, precipitation temperature, and heat treatment time are the same for UNS Nos. C82400, C82500,C82510, C82600, and C82800.Copper AlloyUNS No.Solution Heat TreatmentPrecipitation Temper
41、atureHeat TreatmentTime, hTemperature Time, h/in.C81400C9670018001850F(9821010C) 1 h/in. of cross section and water quench900950F(482510C)2C82000C822001675-1700F(913927C) 1 h/in. of cross section and water quench850900F(454482C)3C82400C82500C82510C82600C8280014001475F(760802C) 1 h/in. of cross secti
42、on and water quench625650F(330343C) 3B770084APPENDIX(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 force is the newton (N), which is defined asthat force which when
43、 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 the General Conference on Weightsand Measures. Since 1 ksi = 6
44、 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 (B 770 05)that may impact the use of this standard. (Approved April 1, 2008.
45、)(1) Revised chromium entry for C82500 in Table 2.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 advised that determination of the validity of any such patent right
46、s, 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 reapproved or withdrawn. Your comments are invited either for r
47、evision 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 you feel that your comments have not received a fair hearing y
48、ou 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. 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).B770085
