1、Designation: B770 10Standard Specification forCopper-Beryllium Alloy Sand Castings for GeneralApplications1This standard is issued under the fixed designation B770; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last r
2、evision. A number in parentheses indicates 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 specification establishes requirement
3、s 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 units
4、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 responsibility
5、 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 extentrefer
6、enced herein:2.2 ASTM Standards:3B30 Specification for Copper Alloys in Ingot FormB208 Practice for Preparing Tension Test Specimens forCopper Alloy Sand, Permanent Mold, Centrifugal, andContinuous CastingsB601 Classification for Temper Designations for Copperand Copper AlloysWrought and CastB824 Sp
7、ecification for General Requirements for CopperAlloy CastingsB846 Terminology for Copper and Copper AlloysE527 Practice for Numbering Metals and Alloys in theUnified Numbering System (UNS)3. General Requirements3.1 The following sections of Specification B824 constitutea part of this specification:3
8、.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 Limits,3.
9、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 supplement thos
10、e appearing inSpecification B824.4. Terminology4.1 For definitions of terms relating to copper and copperalloys, refer to Terminology B846.5. Ordering Information5.1 Include the following information for orders for prod-uct:5.1.1 ASTM designation number, title, and year of issue,5.1.2 Copper Alloy U
11、NS Number designation,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 April 1, 2010. Published May 2010. Originallyapproved in 1987. Last
12、 previous edition approved in 2009 as B770 09. DOI:10.1520/B0770-10.2The UNS system for copper and copper alloys (see Practice E527) 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 accommodatecomp
13、osition 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 volume information, refer to the standards Document Summary page onthe ASTM website.1*A Summary of Changes s
14、ection appears at the end of this standard.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.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 mate
15、rial is purchased for agencies of the U.S.government, the Supplementary Requirements of SpecificationB824 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 p
16、urchase order (Specification B824),5.2.2 Mechanical requirements, if specified in the purchaseorder (Section 10),5.2.3 Pressure test requirements, if specified in the purchaseorder (Specification B824),5.2.4 Soundness requirements, if specified in the purchaseorder (Specification B824),5.2.5 Repair
17、of castings (Section 12),5.2.6 Certification, if specified in the purchase order (Speci-fication B824),5.2.7 Foundry test report, if specified in the purchase order(Specification B824),5.2.8 Witness inspection, if specified in the purchase order(Specification B824), and5.2.9 Product marking, if spec
18、ified in the purchase order(Specification B824).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 or
20、dering 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 al
21、l 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 B82
22、4).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 wit
23、h Classification B601.9. 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 an
24、d 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 obtained b
25、y 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 When
26、 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 th
27、e contract or purchase order,product purchased for an agency of the U. S. government shallconform to the special government regulations specified in theSpecial Requirements.TABLE 1 Nominal CompositionsCopper AlloyUNS No.PreviousDesignationCopper Nickel Silicon Beryllium Cobalt Chromium Iron Zirconiu
28、m 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 2.0 0.5 . . . . .C82510 21C 96.6 . 0.3 2.0 1.1 . . . . .C82600A245C, 245CTA96.8 . 0.3 2.4 0.5 . . .
29、. .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 in the remelt ingot. See Specification B30.B770 102TABLE 2 Chemical RequirementsAComposition,% max,
30、except as indicatedMajor Elements Residual ElementsCopperAlloyUNS No.Copper,BminBeryllium Cobalt Nickel Iron SiliconZirco-niumTitaniumChro-miumLeadManga-neseIron Silicon ZincChro-miumLeadAlu-mi-numTinC81400 remainder 0.020.10 . . . . . . 0.61.0 . . . . . . . . .C82000 remainder 0.450.8 2.402.70C0.20
31、 . . . . . . . 0.10 0.15 0.10 0.09 0.02 0.10 0.10C82200 remainder 0.350.8 0.30 1.03.0 . 0.15 . . . . . . . . . . . .C82400Dremainder 1.601.85 0.200.65 0.20 . . . . . . . 0.20 . 0.10 0.09 0.02 0.15 0.10C82500Dremainder 1.902.25 0.350.70C0.20 . 0.200.35 . . . . . 0.25 . 0.10 0.09 0.02 0.15 0.10C82510
32、remainder 1.902.15 1.01.2 0.20 . 0.200.35 . . . . . 0.25 . 0.10 0.09 0.02 0.15 0.10C82600Dremainder 2.252.55 0.350.65 0.20 . 0.200.35 . . . . . 0.25 . 0.10 0.09 0.02 0.15 0.10C82800Dremainder 2.502.85 0.350.70C0.20 . 0.200.35 . . . . . 0.25 . 0.10 0.09 0.02 0.15 0.10C96700 remainder 1.101.20 . 29.03
33、3.0 0.401.0 0.15 0.150.35 0.150.35 . 0.01 0.401.0 . . . . . . .AAnalysis shall regularly be made only for the major elements. All others are considered residual elements, and if above the noted maximums, may influence performance of the casting, particularly in conductivity,magnetic permeability, an
34、d machinability.BIn reporting chemical analyses obtained by use of instruments such as spectrograph, X-ray, and atomic absorption, copper may be indicated as “remainder,” and taken by difference.CNickel + cobalt.DWhen fine grained castings are specified, 0.020.12 titanium is added for grain refineme
35、nt, usually in the remelt ingot. See Specification B30.B77010312. Casting Repair12.1 The castings shall not be weld repaired without ap-proval of the purchaser.12.2 The castings shall not be impregnated without approvalof the purchaser.13. Sampling13.1 Lot Size:13.1.1 A lot shall consist of all cast
36、ings produced 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 pu
37、rchaser 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 B208.1
38、4. Keywords14.1 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
39、sand 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
40、 173 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 10A
41、ksi = 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 T
42、emperatureHeat 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
43、section and water quench625650F(330343C) 3B770 104APPENDIX(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 whic
44、h 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 the General Conference on Weightsand Measures. Since 1 k
45、si = 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 (B770 09)that may impact the use of this standard. (Approved April 1,
46、2010.)(1) Changed C82600 Cr from .10 to .09.Committee B05 has identified the location of selected changes to this standard since the last issue (B77008)that may impact the use of this standard. (Approved Oct. 1, 2009.)(1) Changed lead level for the following alloys:C82000 Cr from .10 to .09C82400 Cr
47、 from .10 to .09C82510 Cr from .10 to .09C82800 Cr from .10 to .09ASTM 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 s
48、uch 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 reapproved or withdrawn. Your comments are invi
49、ted 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 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
