1、Designation: B 740 09Standard Specification forCopper-Nickel-Tin Spinodal Alloy Strip1This standard is issued under the fixed designation B 740; 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
2、 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 requirements for copper-nickel-
3、tin alloy strip in the following alloys:Copper Alloy UNS No.Nominal Composition Weight %Copper Nickel TinC72700 85 9 6C72900 77 15 8C72650 87.5 7.5 51.2 UnitsThe values stated in inch-pound units and thevalues stated in SI units in Table 5 are to be regarded asstandard, except for grain size which i
4、s stated in metric unitsonly. The values given in parentheses are mathematical con-versions to SI units and are provided for information only andare not considered standard.1.3 The following safety hazard caveat pertains only to thetest method(s) described in this specification.1.3.1 This standard d
5、oes not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 The fol
6、lowing documents of the issue in effect on dateof material purchase form a part of this specification to theextent referenced herein:2.2 ASTM Standards:2B 248 Specification for General Requirements for WroughtCopper and Copper-Alloy Plate, Sheet, Strip, and RolledBarB 598 Practice for Determining Of
7、fset Yield Strength inTension for Copper AlloysB 601 Classification for Temper Designations for Copperand Copper AlloysWrought and CastB 820 Test Method for Bend Test for Determining theFormability of Copper and Copper Alloy StripB 846 Terminology for Copper and Copper AlloysE3 Guide for Preparation
8、 of Metallographic SpecimensE8 Test Methods for Tension Testing of Metallic MaterialsE75 Test Methods for ChemicalAnalysis of Copper-Nickeland Copper-Nickel-Zinc AlloysE 290 Test Methods for Bend Testing of Material forDuctilityE 478 Test Methods for Chemical Analysis of CopperAlloys3. General Requi
9、rements3.1 The following sections of Specification B 248 constitutea part of this specification:3.1.1 Terminology,3.1.2 Materials and Manufacture,3.1.3 Dimensions and Permissible Variations,3.1.4 Workmanship, Finish, and Appearance,3.1.5 Sampling,3.1.6 Significance of Numerical Limits,3.1.7 Inspecti
10、on,3.1.8 Rejection and Rehearing,3.1.9 Certification,3.1.10 Test Reports, and3.1.11 Packaging and Package Marking.3.2 In addition, when a section with a title identical to thatreferenced in 3.1 above appears in this specification, it containsadditional requirements that supplement those appearing in
11、Specification B 248.4. Terminology4.1 For definitions of terms related to copper and copperalloys, refer to Terminology B 846.5. Ordering Information5.1 Include the following information when placing ordersfor product under this specification, as applicable:5.1.1 ASTM designation and year of issue,1
12、This specification is under the ASTM Committee B05on Copper and CopperAlloys and is the direct responsibility of Subcommittee B05.01 on Plate, Sheet, andStrip.Current edition approved Aug. 15, 2009. Published September 2009. Originallyapproved in 1984. Last previous edition approved in 2002 as B 740
13、 02.2For 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 section appears at the end of this
14、 standard.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.5.1.2 Quantity,5.1.3 Copper Alloy UNS No. (see 1.1),5.1.4 Form of material: strip,5.1.5 Temper (see 8.1),5.1.6 Dimensions: thickness and width, and length if appli-cable,5.1.7
15、How furnished: rolls or coils, stock lengths with orwithout ends, specific lengths with or without ends,5.1.8 Type of edge other than slit, for example, roundedcorners, rounded edges, or full-rounded edges.5.1.9 When material is purchased for agencies of the U.S.Government, this shall be specified i
16、n the contract or purchaseorder, and the material shall conform to the SupplementaryRequirements Section as defined in the current edition ofSpecification B 248.5.2 The following options are available and should bespecified at the time of placing of the order when required:5.2.1 Certification if req
17、uired,5.2.2 Mill test report if required,6. Chemical Composition6.1 The material shall conform to the chemical compositionrequirements specified in Table 1 for the copper alloy UNS No.designation specified in the ordering information.6.2 These composition limits do not preclude the presenceof other
18、elements. By agreement between manufacturer orsupplier and purchaser, limits may be established and analysisrequired for unnamed elements.6.3 Copper may be given as remainder and taken as thedifference between the sum of all the elements analyzed and100%. When all the elements in the table including
19、 copper areanalyzed, their sum shall be 99.7% min.7. Materials and Manufacture7.1 ManufactureSpinodal Heat Treatment.7.1.1 Solution-heat-treatment or solution-heat-treated andcold-worked material is normally spinodal hardened by thepurchaser after forming or machining.7.1.2 Mill-hardened products ha
20、ve been spinodal heattreated by the manufacturer. Further thermal treatment is notnormally required.8. Temper8.1 The standard tempers for products described in thisspecification are given in Tables 2-48.1.1 TB00 (Solution Heat Treated)8.1.2 TD01 to TD 12 (Solution Heat Treated with varyingdegrees of
21、 cold working)8.1.3 TX00 ( Spinodal Hardened)8.1.4 TS01 to TS12 (Hard and Spinodal Hardened)8.1.5 TM00 to TS08 (mill hardened)8.2 Other tempers are available and shall be subject toagreement between supplier or manufacturer and purchaser.9. Grain Size for Annealed Tempers9.1 Product over 0.010 in. (
22、0.25 mm) in thickness shall havean average grain-size not exceeding the limits prescribed inTable 5. The determinations are made on the separate samplesand in a plane perpendicular to the surface.10. Mechanical Property Requirements10.1 Tensile Strength Requirements:10.1.1 The solution heat-treated
23、or solution heat-treated andcold-worked material shall conform to the tensile propertyrequirements specified in Table 2, when tested in accordancewith Test Methods E8.10.1.2 The spinodal heat-treated material shall conform tothe tensile property requirements specified in Table 3.10.1.2.1 Special com
24、binations of properties such as in-creased ductility, electrical conductivity, dimensional accuracy,endurance life, improved stress relaxation resistance, resistanceto elastic drift, and hysteresis in springs may be obtained byspecial spinodal-hardening treatments. The mechanical re-quirements of Ta
25、ble 3 do not apply to such special heattreatments.10.1.3 The mill-hardened material shall conform to thetensile property requirements specified in Table 4.11. Performance Requirements11.1 Bend TestingThe bend test is a method for evaluatingthe ductility of mill-hardened copper-nickel-tin spinodal al
26、loystrip in thicknesses of 0.004 to 0.020 in. (0.102 to 0.508 mm),inclusive.11.1.1 Material in tempers TM00, TM02, TM04, and TM06shall conform to the bend test requirements specified in Table4 when tested in accordance with 15.2.1.11.1.2 To pass the test, all three specimens tested from a lotmust wi
27、thstand the 90 bend without visible cracks of fracturewhen observed of the convex surface of the bend at amagnification of 310.12. Dimensions and Permissible Variations12.1 The dimensions and tolerances for product describedby this specification shall be as specified in Specification B 248with parti
28、cular reference to the following tables and relatedparagraphs:12.1.1 ThicknessTable 212.1.1.1 Special ThicknessTable 3TABLE 1 Chemical RequirementsComposition, %CopperAlloy UNSNo.PreviousDesignationCopper,inclSilverLead,AmaxIron,AmaxZinc,AmaxNickel,inclCobaltTinManga-nese,AmaxNio-bium,AmaxMagne-sium
29、,AmaxC72650 Cu-7.5Ni-5Sn remainder 0.01 0.10 0.10 7.08.0 4.55.5 0.10 . .C72700 Cu-9Ni-6Sn remainder 0.02B0.50 0.50 8.59.5 5.56.5 0.05-0.30 0.10 0.15C72900 Cu-15Ni-8Sn remainder 0.02B0.50 0.50 14.515.5 7.58.5 0.30 0.10 0.15AThe total of the elements Pb, Fe, Zn, Mn, Nb, and Mg not to exceed 0.7 %.B0.0
30、05 % Pb, max for hot rolling.B74009212.1.2 Width12.1.3 Length12.1.4 Straightness12.1.4.1 Slit Metal or Slit Metal Either Straightened or EdgeRolled13. Retests13.1 If any lot of material fails to conform to the require-ments of this specification due to inadequate heat treatment,new samples of materi
31、al may be resubmitted for test after heattreatment. Only two such reheat treatments shall be permitted.13.2 If any lot of material fails to conform to the bend testrequirements of this specification, one retest is permitted ifonly one of the three specimens fails the test. No retest ispermitted if t
32、wo or more specimens fail the test.14. Specimen Preparation14.1 For the purpose of determining conformance to themechanical properties of Table 3, a sample of the non-spinodally hardened strip of alloys C72700 and C72900material shall be heat treated at 662 +/- 9F (350 +/- 5C) for1 h +/- 5 min and a
33、 sample of the as-supplied strip of alloyC72650 shall be heat treated at 725 +/- 9 (385 +/- 5C) for 2h +/- 5 min. Other heat-treating temperatures and times may bepreferred for end products of this material.14.2 Specimens for the determination of grain size shall beprepared in accordance with Guide
34、E3.14.3 For bend testing, three specimens,12 6116 in. (12.706 1.59 mm) in width of any convenient length, with the rollingdirection perpendicular to the12 in. dimension, shall beprepared and tested in accordance with Test Method B 820.15. Test Methods15.1 Chemical Analysis:15.1.1 Composition shall b
35、e determined, in case of dis-agreement, as follows:TABLE 2 Tensile Property RequirementsTempers: Solution Heat-TreatedSolution Heat-Treated and Cold WorkedCopper AlloyUNS No.Temper DesignationsTensileStrength,ksiA(MPa)BminmaxCYieldDStrength(0.05 % Offset),ksiA(MPa)BminmaxCElongationin2in.,%Code Name
36、C72650 TB00 Solution HT 5570 2132 32(380480) (145220)C72650 TD01 Solution HT and Cold Worked14 Hard 6075 4560 18(415515) (310415)C72650 TD02 Solution HT and Cold Worked12 Hard 7585 5575 5(515585) (380515)C72650 TD03 Solution HT and Cold Worked34 Hard 8090 6882 4(550620) (470565)C72650 TD04 Solution
37、HT and Cold Worked Hard 8595 7790 2(585655) (530620)C72700 TB00 Solution HT 6080 2333 30(410550) (160230)C72700 TD01 Solution HT and Cold Worked14 Hard 7295 4864 12(500660) (330440)C72700 TD02 Solution HT and Cold Worked12 Hard 82108 5780 6(570740) (390550)C72700 TD04 Solution HT and Cold Worked Har
38、d 97125 77100 3(670860) (530690)C72700 TD08 Solution HT and Cold Worked Spring 110140 95115 2(760970) (660790)C72700 TD12 Solution HT and Cold Worked Special Spring 115150 105125 .(7901030) (720860)C72900 TB00 Solution HT 6485 2440 32(440585) (165275)C72900 TD01 Solution HT and Cold Worked14 Hard 75
39、100 5066 18(515690) (345455)C72900 TD02 Solution HT and Cold Worked12 Hard 85110 6584 8(585760) (450580)C72900 TD03 Solution HT and Cold Worked34 Hard 95-120 80-100 3(655-825) (550-690)C72900 TD04 Solution HT and Cold Worked Hard 100130 85108 .(690895) (585745)C72900 TD08 Solution HT and Cold Worked
40、 Spring 122145 100125 .(8401000) (690860)C72900 TD12 Solution HT and Cold Worked Special Spring 135155 110130 .(9301070) (760895)A1 ksi = 1000 psi.BSee Appendix X1.CMax for reference.DAs per Practice B 598.B740093Element Test MethodsCopper E75Nickel E 478Tin E75Lead E75Iron E75Zinc E75Manganese E751
41、5.1.2 Test methods to be followed for the determination ofelements not listed above or elements resulting from contrac-tural or purchase order agreement, shall be as agreed uponbetween the manufacturer or supplier and purchaser.15.2 Other Tests:15.2.1 Bend TestThe axis of the bend shall be at an ang
42、leof 90 to the direction of rolling, unless otherwise specified.The test specimens shall be bent 90 6 5 around the test radius.15.2.2 The test radius shall be within +/- 6 % of the nominalradius up to 0.010 in. (0.254 mm) , and within +/- 4 % for radii0.010 in. (0.254 mm) and over.15.2.3 The determi
43、nations are made on the separate samplesand in a plane perpendicular to the surface.16. Keywords16.1 age hardening; copper-nickel-tin; spinodal; strip; UNSC72650; UNS C72700; UNS C72900TABLE 3 Tensile Property RequirementsTempers: Solution Heat Treated and Spinodally Hardened;ASolution Heat Treated,
44、 Cold Worked and Spinodally HardenedACopper AlloyUNS No.Temper DesignationsTensileStrength,ksiB(MPa)CminmaxDYieldEStrength(0.05 % Offset),ksiB(MPa)CminmaxDElongationin2in.,%Code NameC72650 TX00 Spinodal HT 120140 6095 6(825965) (415655)C72650 TS0114 Hard and Spinodal HT 130140 90115 8(900965) (62079
45、0)C72650 TS0212 Hard and Spinodal HT 135145 100125 6(9301000) (690860)C72650 TS0334 Hard and Spinodal HT 140150 105130 6(9651035) (725895)C72650 TS04 Hard and Spinodal HT 140155 110135 4(9651070) (760930)C72700 TX00 Spinodal HT 100130 5599 15(690900) (380680)C72700 TS0114 Hard + Spinodal HT 115140 8
46、5112 10(790970) (590770)C72700 TS0212 Hard + Spinodal HT 125150 100123 6(8601030) (690850)C72700 TS04 Hard + Spinodal HT 135160 115135 4(9301100) (790930)C72700 TS08 Spring + Spinodal HT 145179 125150 3(10001230) (8601030)C72700 TS12 Special Spring + Spinodal HT 150180 130160 2(10301240) (9001100)C7
47、2900 TX00 Spinodal HT 120150 95120 6(8251035) (655825)C72900 TS0114 Hard + Spinodal HT 130160 105130 4(8951105) (725895)C72900 TS0212 Hard + Spinodal HT 145175 125150 3(10001205) (8601035)C72900 TS0334 Hard + Spinodal HT 155185 135160 2(10701275) (9301105)C72900 TS04 Hard + Spinodal HT 165195 145170
48、 2(11401345) (10051170)C72900 TS08 Spring + Spinodal HT 175205 155185 .(12051415) (10701275)C72900 TS12 Special Spring + Spinodal HT 180225 160200 .(12401550) (11051380)A662 6 9F (350 6 5C) for 112 h 6 5 min (C72700, C72900); 725 6 9F (385 6 5C) for 2 h 6 5 min (C72650).B1 ksi = 1000 psi.CSee Append
49、ix X1.DMax for reference.EAs per Practice B 598.B740094APPENDIX(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 applied to a body having a mass of onekilogram gives it an acceleration of one metre p
