1、Designation: B 740 02Standard 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 (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 requirements for copper-nicke
3、l-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. The values given in parenth
4、eses are mathematicalconversions to SI units and are provided for information onlyand are not considered standard.2. 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:2.2 ASTM Standards:
5、B 248 Specification for General Requirements for WroughtCopper and Copper-Alloy Plate, Sheet, Strip, and RolledBar2B 598 Practice for Determining Offset Yield Strength inTension for Copper Alloys2B 601 Classification for Temper Designations for Copperand Copper AlloysWrought and Cast2B 820 Test Meth
6、od for Bend Test for Formability of CopperAlloy Spring Material2B 846 Terminology for Copper and Copper Alloys2E 3 Guide for Preparation of Metallographic Specimens3E 8 Test Methods for Tension Testing of Metallic Materials3E 75 Test Methods for Chemical Analysis of Copper-Nickeland Copper-Nickel-Zi
7、nc Alloys4E 290 Test Method for Bend Testing of Material for Duc-tility3E 478 Test Methods for Chemical Analysis of CopperAlloys43. General Requirements3.1 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 Dim
8、ensions and Permissible Variations,3.1.4 Workmanship, Finish, and Appearance,3.1.5 Sampling,3.1.6 Significance of Numerical Limits,3.1.7 Inspection,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 ti
9、tle identical to thatreferenced in 3.1 above appears in this specification, it containsadditional requirements that supplement those appearing inSpecification B 248.4. Terminology4.1 For definitions of terms related to copper and copperalloys, refer to Terminology B 846.5. Ordering Information5.1 In
10、clude the following information in orders for prod-ucts:5.1.1 Specification number and date,5.1.2 Quantity,5.1.3 Copper Alloy UNS number (see 1.1),5.1.4 Form of material: strip,5.1.5 Temper (see 7.1),5.1.6 Dimensions: thickness and width, and length if appli-cable,5.1.7 How furnished: rolls or coils
11、, stock lengths with orwithout ends, specific lengths with or without ends, and1This 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 July 10, 2002. Published September 2
12、002. Originallypublished as B 740 84. Last previous edition B 740 96.2Annual Book of ASTM Standards, Vol 02.01.3Annual Book of ASTM Standards, Vol 03.01.4Annual Book of ASTM Standards, Vol 03.05.1*A Summary of Changes section appears at the end of this standard.Copyright ASTM International, 100 Barr
13、 Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.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 in the contract or purchaseor
14、der, and the material shall conform to the SupplementaryRequirements as defined in the current edition of SpecificationB 248.5.2 The following options are available and should bespecified at the time of placing of the order when required:5.2.1 Width and straightness tolerances, if different fromthos
15、e required in Specification B 248.5.2.2 Special thickness tolerances if required,5.2.3 Certification if required,5.2.4 Mill test report if required, and5.2.5 Special tests or exceptions, if any.6. Chemical Composition6.1 The material shall conform to the requirements specifiedin Table 1.6.2 These sp
16、ecification limits do not preclude the presenceof other elements. Limits for unnamed elements may beestablished by agreement between manufacturer or supplierand purchaser. Copper may be given as remainder and taken asthe difference between the sum of all elements analyzed and100 %. When all the elem
17、ents in the table including copper areanalyzed, their sum shall be 99.7 % min.7. Temper7.1 The standard tempers of material are as designated inTable 2, Table 3, and Table 4. Tempers are as follows: TB00(solution heat treated), or with varying additional degrees ofcold rolling TD01 to TD12 (solution
18、 heat treated with varyingdegrees of cold rolling); spinodal hardened from these appro-priate tempers TX00 or TS01 to TS12 (spinodal hardened fromthe appropriate solution heat treated or solution heat treatedand cold rolled temper); or Mill Hardened TM00 to TM08(mill hardened).7.2 Other tempers are
19、available and shall be subject toagreement between supplier or manufacturer and purchaser.8. Grain Size for Annealed Tempers8.1 Product over 0.010 in. (0.25 mm) in thickness shall havean average grain-size not exceeding the limits prescribed inTable 5. The determinations are made on the separate sam
20、plesand in a plane perpendicular to the surface.9. Mechanical Property Requirements9.1 Tensile Strength Requirements:9.1.1 The solution heat-treated or solution heat-treated andcold-worked material shall conform to the tensile propertyrequirements specified in Table 2, when tested in accordancewith
21、Test Methods E 8.9.1.2 The spinodal heat-treated material shall conform tothe tensile property requirements specified in Table 3. Spinodalheat-treatment parameters are given in 11.1.9.1.3 The mill-hardened material shall conform to the ten-sile property requirements specified in Table 4.10. Performa
22、nce Requirements10.1 Bend TestingThe bend test is a method for evaluatingthe ductility of mill-hardened copper-nickel-tin spinodal alloystrip in thicknesses of 0.004 to 0.020 in. (0.102 to 0.508 mm),inclusive.10.1.1 Material in tempers TM00, TM02, TM04, and TM06shall conform to the bend test require
23、ments specified in Table4 when tested in accordance with 14.2.1.11. Spinodal Heat Treatment11.1 Solution-heat-treated or solution-heat-treated and cold-worked material is normally spinodal hardened by the pur-chaser after forming or machining. For the purpose of deter-mining conformance to the mecha
24、nical properties of Table 3, asample of the as-supplied strip of alloys C72700 and C72900material shall be heat treated at 662 6 9F (3506 5C) for 112h 6 5 min and a sample of the as-supplied strip of alloyC72650 shall be heat treated at 725 6 9F (385 6 5C) for 2h 6 5 min. Other heat-treating tempera
25、tures and times may bepreferred for end products of this material.11.2 Special combinations of properties such as increasedductility, electrical conductivity, dimensional accuracy, endur-ance life, improved stress relaxation resistance, resistance toelastic drift, and hysteresis in springs may be ob
26、tained byspecial spinodal-hardening treatments. The mechanical re-quirements of Table 3 do not apply to such special heattreatments.11.3 Mill-hardened products have been spinodal heat treatedby the manufacturer. Further thermal treatment is not normallyrequired.12. Retests12.1 If any lot of material
27、 fails to conform to the require-ments of this specification due to inadequate heat treatment,new samples of material may be resubmitted for test after heattreatment. Only two such reheat treatments shall be permitted.12.2 If any lot of material fails to conform to the bend testrequirements of this
28、specification, one retest is permitted ifTABLE 1 Chemical RequirementsComposition, %CopperAlloy UNSNo.PreviousDesignationCopper,inclSilverLead,AmaxIron,AmaxZinc,AmaxNickel,inclCobaltTinManga-nese,AmaxNio-bium,AmaxMagne-sium,AmaxC72650 Cu-7.5Ni-5Sn remainder 0.01 0.10 0.10 7.08.0 4.55.5 0.10 . .C7270
29、0 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 %.B0.005 % Pb, max for hot rolling.B740022only one of the three specimens fails the
30、 test. No retest ispermitted if two or more specimens fail this test.13. Specimen Preparation13.1 Tension test specimens shall be prepared as specified inTest Methods E 8. The longitudinal axis of the specimen shallbe parallel to the direction of rolling unless otherwise specified.13.2 Specimens for
31、 the determination of grain size shall beprepared in accordance with Guide E 3.13.3 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 Me
32、thod B 820.14. Test Methods14.1 Chemical Analysis:14.1.1 Composition shall be determined, in case of dis-agreement, as follows:Element Test MethodsCopper E 75Nickel E 478Tin E 75Lead E 75Iron E 75Zinc E 75Manganese E 7514.2 Other Tests:14.2.1 Bend TestThe axis of the bend shall be at an angleof 90 t
33、o the direction of rolling, unless otherwise specified.The test specimens shall be bent 90 6 5 around the test radius.To pass the test, all three specimens tested from a lot mustwithstand the 90 bend without visible cracks or fracture whenobserved on the convex surface of the bend at a magnification
34、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)BminmaxCElongationin 2 in., %StandardEFormerC72650 TB00 Solution HT 5570 2132 32(38048
35、0) (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 HT and Cold Worked Hard 8595 7790 2(585655
36、) (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 Hard 97125 77100 3(670860) (530690)C72700 TD0
37、8 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 75100 5066 18(515690) (345455)C72900 TD02 So
38、lution 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 Spring 122145 100125 .(8401000) (690860)C
39、72900 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.EAs per Classification B 601.B740023of 103. The test radius shall be within 66 % of the nominalradius up to 0.010 in. (0.254 mm), and wi
40、thin 64 % for radii0.010 in. (0.254 mm) and over.15. Keywords15.1 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, Cold Worked and Spinodally Hardene
41、dACopper AlloyUNS No.Temper DesignationsTensileStrength,ksiB(MPa)CminmaxDYieldEStrength(0.05 % Offset),ksiB(MPa)CminmaxDElongationin 2 in., %StandardFFormerC72650 TX00 Spinodal HT 120140 6095 6(825965) (415655)C72650 TS0114Hard and Spinodal HT 130140 90115 8(900965) (620790)C72650 TS0212Hard and Spi
42、nodal HT 135145 100125 6(9301000) (690860)C72650 TS0334Hard 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 TS0114Hard + Spinodal HT 115140 85112 10(790970) (590770)C72700
43、 TS0212Hard + 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)C72900 TX00 Spinodal HT 120150 95
44、120 6(8251035) (655825)C72900 TS0114Hard + Spinodal HT 130160 105130 4(8951105) (725895)C72900 TS0212Hard + Spinodal HT 145175 125150 3(10001205) (8601035)C72900 TS0334 Hard + Spinodal HT 155185 135160 2(10701275) (9301105)C72900 TS04 Hard + Spinodal HT 165195 145170 2(11401345) (10051170)C72900 TS0
45、8 Spring + Spinodal HT 175205 155185 .(12051415) (10701275)C72900 TS12 Special Spring + Spinodal HT 180225 160200 .(12401550) (11051380)A662 6 9F (350 6 5C) for 112h 6 5 min (C72700, C72900); 725 6 9F (385 6 5C) for 2 h 6 5 min (C72650).B1 ksi = 1000 psi.CSee Appendix X1.DMax for reference.EAs per P
46、ractice B 598.FAs per Classification B 601.B740024APPENDIX(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
47、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
48、si = 6 894 757 Pa, the metric equiva-lents are expressed as megapascal (MPa), which is the same asMN/m2and N/mm2.TABLE 4 Mechanical Property Requirements Copper Alloy UNS Nos. C72650 and C72900Mill Hardened TempersCopperAlloysUNS No.Temper DesignationsTensileStrength,ksiA(MPa)BminmaxYieldStrength(0.
49、2 % offset)C,ksiA(MPa)BminmaxYieldStrengthD(0.05 % offset)ksiA(MPa)BminmaxEElongationin 2 in., %minMinimum90 Bad WayBend Ratio(R/t)FStandardGFormerC72650 TM00 AM 100120 7090 6585 18 1(690825) (480620) (450555)C72650 TM0212 HM 115135 90110 85105 10 2.5(790930) (620760) (585725)C72650 TM04 HM 115135 100120 95115 10 3.7(790930) (690830) (655790)C72650 TM06 XHM 120140 105125 10
