1、Designation: B770 10B770 15Standard 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
2、 last revision. 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 U.S. Department of Defense.1. Scope*1.1 This specification establishes
3、 requirements for copper-beryllium alloy sand castings for general applications and nominalcompositions alloys defined by this specification are shown in Table 1.21.2 UnitsThe values stated in inch-pound units are to be regarded as standard. The values given in parentheses aremathematical conversion
4、s to SI units that are provided for information only and are not considered standard.1.3 The following safety hazard caveat pertains only to the test methods described in this specification: This standard does notpurport to address all of the safety concerns, if any, associated with its use. It is t
5、he responsibility of the user of this standard toestablish appropriate safety and health practices and determine the applicability of regulatory requirements prior to use.2. Referenced Documents2.1 The following documents in the current issue of the Book of Standards form a part of this specificatio
6、n to the extentreferenced herein:2.2 ASTM Standards:3B30 Specification for Copper Alloys in Ingot FormB208 Practice for Preparing Tension Test Specimens for Copper Alloy Sand, Permanent Mold, Centrifugal, and ContinuousCastingsB601 Classification for Temper Designations for Copper and Copper AlloysW
7、rought and CastB824 Specification for General Requirements for Copper Alloy CastingsB846 Terminology for Copper and Copper AlloysE527 Practice for Numbering Metals and Alloys in the Unified Numbering System (UNS)3. General Requirements3.1 The following sections of Specification B824 constitute a par
8、t of this specification: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
9、of of Numerical Limits,1 This specification is under the jurisdiction of ASTM Committee B05 on Copper and Copper Alloys and is the direct responsibility of Subcommittee B05.05 on Castingsand Ingots for Remelting.Current edition approved April 1, 2010May 1, 2015. Published May 2010May 2015. Originall
10、y approved in 1987. Last previous edition approved in 20092010 asB770 09.B770 10. DOI: 10.1520/B0770-10.10.1520/B0770-15.2 The UNS system for copper and copper alloys (see Practice E527) is a simple expansion of the former standard designation system accomplished by the addition of aprefix “C” and a
11、 suffix “00”. The suffix can be used to accommodate composition variations of the base alloy.3 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document S
12、ummary page on the ASTM website.This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM recomme
13、nds that users consult prior editions as appropriate. In all cases only the current versionof the standard as published by ASTM is to be considered the official document.*A Summary of Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700,
14、 West Conshohocken, PA 19428-2959. United States13.1.11 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 that referenced in 3.1 appears in this specification, it c
15、ontains additionalrequirements which supplement those appearing in Specification B824.4. Terminology4.1 For definitions of terms relating to copper and copper alloys, refer to Terminology B846.5. Ordering Information5.1 Include the following information for orders for product:5.1.1 ASTM designation
16、number, title, and year of issue,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, machined, and so forth),5.1.6 When material is purchased for agencies of the U.S. government, the Supplementary Requiremen
17、ts of Specification B824may be specified.5.2 The following options are available and should be specified in the contract or purchase order when required.5.2.1 Chemical analysis of residual elements, if specified in the purchase order (Specification B824),5.2.1 Mechanical requirements, if specified i
18、n the purchase order (Section 10),5.2.2 Pressure test requirements, if specified in the purchase order (Specification B824),5.2.3 Soundness requirements, if specified in the purchase order (Specification B824),5.2.4 Repair of castings (Section 12),5.2.5 Certification, if specified in the purchase or
19、der (Specification B824),5.2.6 Foundry test report, if specified in the purchase order (Specification B824),5.2.7 Witness inspection, if specified in the purchase order (Specification B824), and5.2.8 Product marking, if specified in the purchase order (Specification B824).6. Materials and Manufactur
20、e6.1 MaterialThe material of manufacture shall be castings of the copper alloys listed in Table 1, as specified in the purchaseorder or contract, and of such purity and soundness as to be suitable for the products prescribed herein.6.2 ManufactureThe product shall be manufactured by casting and ther
21、mal treatment to meet the properties specified.7. Chemical Composition7.1 The castings shall conform to the chemical composition requirements prescribed in Table 2 for the Copper Alloy UNSNumber designations specified in the ordering information.7.2 These composition limits do not preclude the prese
22、nce of other elements. Limits may be established for unnamed elementsby agreement between manufacturer or supplier and purchaser.7.3 Copper is customarily given as remainder but may be taken as the difference between the sum of all elements analyzed and100 %.TABLE 1 Nominal CompositionsCopper AlloyU
23、NS No.PreviousDesignation Copper 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 . . . . . .C82400A 165C, 165CTA 97.8 . . 1.7 0.5 . . . . .C82500A 20C, 20CTA 97.2 . 0.3 2.0 0.5 .
24、 . . . .C82510 21C 96.6 . 0.3 2.0 1.1 . . . . .C82600A 245C, 245CTA 96.8 . 0.3 2.4 0.5 . . . . .C82800A 275C, 275CTA 96.6 . 0.3 2.6 0.5 . . . . .C96700 72C 67.2 31.0 . 1.2 . . 0.6 0.3 0.3 0.6A When fine-grained castings are specified, 0.02 to 0.12 titanium is added for grain refinement, usually in t
25、he remelt ingot. See Specification B30.B770 152TABLE 2 Chemical RequirementsAComposition,% max, except as indicatedMajor Elements Residual ElementsCopperAlloyUNS No.Copper,Bmin Beryllium Cobalt Nickel Iron SiliconZirco-nium TitaniumChro-mium LeadManga-nese Iron Silicon ZincChro-mium LeadAlu-mi-numTi
26、nC81400 remainder 0.020.10 . . . . . . 0.61.0 . . . . . . . . .C82000 remainder 0.450.8 2.402.70C 0.20 . . . . . . . 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 . . . . . . . . . . . .C82400D remainder 1.601.85 0.200.65 0.20 . . . . . . . 0.20 . 0.10 0.09 0.02 0.15
27、0.10C82500D remainder 1.902.25 0.350.70C 0.20 . 0.200.35 . . . . . 0.25 . 0.10 0.09 0.02 0.15 0.10C82510 remainder 1.902.15 1.01.2 0.20 . 0.200.35 . . . . . 0.25 . 0.10 0.09 0.02 0.15 0.10C82600D remainder 2.252.55 0.350.65 0.20 . 0.200.35 . . . . . 0.25 . 0.10 0.09 0.02 0.15 0.10C82800D remainder 2
28、.502.85 0.350.70C 0.20 . 0.200.35 . . . . . 0.25 . 0.10 0.09 0.02 0.15 0.10C96700 remainder 1.101.20 . 29.033.0 0.401.0 0.15 0.150.35 0.150.35 . 0.01 0.401.0 . . . . . . .TABLE 2 Chemical RequirementsAComposition,% max, except as indicatedCopperAlloyUNS No.Copper,Bmin Beryllium Cobalt Nickel Silicon
29、 Zirconium Titanium Manganese Iron Zinc Chromium LeadAluminum TinC81400 remainder 0.020.10 . . . . . . . . 0.61.0 . . .C82000 remainder 0.450.8 2.402.70C 0.20C 0.15 . . . 0.10 0.10 0.09 0.02 0.10 0.10C82200 remainder 0.350.8 0.30 1.03.0 0.15 . . . . . . . . .C82400D remainder 1.601.85 0.200.65 0.20
30、. . . . 0.20 0.10 0.09 0.02 0.15 0.10C82500D remainder 1.902.25 0.350.70C 0.20C 0.200.35 . . . 0.25 0.10 0.09 0.02 0.15 0.10C82510 remainder 1.902.15 1.01.2 0.20 0.200.35 . . . 0.25 0.10 0.09 0.02 0.15 0.10C82600D remainder 2.252.55 0.350.65 0.20 0.200.35 . . . 0.25 0.10 0.09 0.02 0.15 0.10C82800D r
31、emainder 2.502.85 0.350.70C 0.20C 0.200.35 . . . 0.25 0.10 0.09 0.02 0.15 0.10C96700 remainder 1.101.20 . 29.033.0C 0.15 0.150.35 0.150.35 0.401.0 0.401.0 . . 0.01 . .A Analysis shall regularly be made only for the major elements. All others are considered residual elements, and if above the noted m
32、aximums, may influence performance of the casting, particularly in conductivity,magnetic permeability, and machinability.B In 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
33、.C Nickel + cobalt.D When fine grained castings are specified, 0.020.12 titanium is added for grain refinement, usually in the remelt ingot. See Specification B30.B7701537.4 When all elements in Table 2 are analyzed, their sum shall be 99.5 % minimum.7.5 It is recognized that residual elements may b
34、e present in cast copper-base alloys. Analysis shall be made for residualelements only when specified in the purchase order (Specification B824).8. Temper8.1 The standard tempers are listed as follows:8.1.1 TF00Cast, solution heat treated and precipitation heat treated.8.1.2 M01As sand cast.8.1.3 Sp
35、ecial or non-standard tempers are subject to negotiation between the supplier and purchaser. Standard temperdesignations are in accordance with Classification B601.9. Precipitation Heat Treatment9.1 For the purpose of determining conformance to the appropriate requirement in Table 3, the castings an
36、d test specimens shallbe precipitation heat-treated at a uniform temperature from the solution heat-treated condition. Solution heat-treatment andprecipitation heat-treatments are listed in Table 4. Other treatment times and temperatures may be preferable for end products madefrom this material.9.2
37、Special combinations of properties such as increased ductility, electrical conductivity, dimensional accuracy, and endurancelife may be obtained by special precipitation heat-treatments. The mechanical requirements of Table 3 do not apply to such specialheat-treatments. Specific test requirements as
38、 needed shall be agreed upon between the manufacturer or supplier and purchaser ofthe end product.10. Mechanical Property Requirements10.1 When tension tests are required, separately cast test-bar specimens shall be used to determine mechanical properties andshall meet the requirements shown in Tabl
39、e 3 in the as cast or solution heat-treated and precipitation heat-treated condition.11. Purchases for U. S. Government11.1 When specified in the contract or purchase order, product purchased for an agency of the U. S. government shall conformto the special government regulations specified in the Sp
40、ecial Requirements.12. Casting Repair12.1 The castings shall not be weld repaired without approval of the purchaser.12.2 The castings shall not be impregnated without approval of the purchaser.TABLE 3 Mechanical RequirementsNOTE 1“TF00” property values denote product in the standard solution heat-tr
41、eated and precipitation heat-treated condition.NOTE 2“M01” property values denote product in the as sand cast condition.Copper AlloyUNS No.TemperDesignationTensile Strength, min Yield Strength 0.2 % OffsetksiA MPaB ksiA MPaB Elongation % min in4DCC81400 TF00 53 366 36 248 11C81400 M01 45 311 15 104
42、15C82000 TF00 90 621 70 483 3C82000 M01 45 311 15 104 15C82200 TF00 90 621 70 483 5C82200 M01 55 380 25 173 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 11
43、39 155 1070 1C82600 M01 80 552 45 311 10C82800 TF00 165 1139 155 1070 1/2C96700 TF00 125 863 80 552 10A ksi = 1000 psi.B See Appendix.C 4D = 4 diameter.B770 15413. Sampling13.1 Lot Size:13.1.1 A lot shall consist of all castings produced from one furnace melt or crucible melt.13.1.2 When two or more
44、 furnace melts or crucible melts, or both, are used to charge a ladle for pouring, the castings producedtherefrom shall constitute a lot.13.1.3 A lot may consist of such groups of melts as agreed upon by the manufacturer and purchaser and in such case a lot shallconsist of not more than 1000 lb (455
45、 kg) of castings (gates and risers removed).13.1.4 Test bar specimens for the Copper Alloy UNS Numbers in this specification shall be cast to the form and dimensionsshown in Figs. 1, Figs. 2, Figs. 3, or Figs. 4 in Practice B208.14. Keywords14.1 copper alloy castings; copper-base alloy castings; cop
46、per beryllium castingsAPPENDIX(Nonmandatory Information)X1. METRIC EQUIVALENTSX1.1 The SI unit for strength properties now shown is in accordance with the International System of Units (SI). The derived SIunit for force is the newton (N), which is defined as that force which when applied to a body h
47、aving a mass of one kilogram givesit an acceleration of one metre per second squared (N = kgms2).The derived SI unit for pressure or stress is the newton per squaremetre (N/m2), which has been named the pascal (Pa) by the General Conference on Weights and Measures. Since 1 ksi = 6 894 757Pa the metr
48、ic equivalents are expressed as megapascal (MPa), which is the same as MN/m2 and N/mm2.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
49、No.Solution Heat Treatment Precipitation Temperature Heat TreatmentTime, hTemperature Time, h/in.C81400C96700 18001850F(9821010C) 1 h/in. of cross section and water quench 900950F(482510C) 2C82000C82200 1675-1700F(913927C) 1 h/in. of cross section and water quench 850900F(454482C) 3C82400C82500C82510C82600C8280014001475F(760802C) 1 h/in. of cross section and water quench625650F(330343C) 3TABLE 4 Thermal TreatmentsNOTE 1The values given for solution heat treatment, precipitation temp
