ASTM A764-2007(2017) Standard Specification for Metallic Coated Carbon Steel Wire Coated at Size and Drawn to Size for Mechanical Springs《机械弹簧用冷拉镀锌和按成品尺寸镀锌的碳素钢丝的标准规格》.pdf

1、Designation: A764 07 (Reapproved 2017)Standard Specification forMetallic Coated Carbon Steel Wire, Coated at Size andDrawn to Size for Mechanical Springs1This standard is issued under the fixed designation A764; the number immediately following the designation indicates the year oforiginal adoption

2、or, in the case of revision, the year of 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.

3、Scope*1.1 This specification covers two finishes of round, metalliccoated, hard-drawn, carbon steel spring wire having propertiesand quality for the manufacture of mechanical springs and wireforms that are not subject to high stress or require high fatigueproperties.1.2 The values stated in inch-pou

4、nd units are to be regardedas the standard. The values stated in SI units are for informa-tion purposes only.1.3 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of Int

5、ernational Standards, Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2A90/A90M Test Method for Weight Mass of Coating onIron and Steel Articles with Zinc or Zinc-Alloy CoatingsA370 Test Methods a

6、nd Definitions for Mechanical Testingof Steel ProductsA428/A428M Test Method for Weight Mass of Coating onAluminum-Coated Iron or Steel ArticlesA510 Specification for General Requirements for Wire Rodsand Coarse Round Wire, Carbon SteelA700 Guide for Packaging, Marking, and Loading Methodsfor Steel

7、Products for ShipmentA751 Test Methods, Practices, and Terminology for Chemi-cal Analysis of Steel ProductsB6 Specification for ZincB750 Specification for GALFANE29 Practice for Using Significant Digits in Test Data toDetermine Conformance with Specifications2.2 U.S. Government Standards:3Fed. Std.

8、No. 123 Marking for Shipment (Civil Agencies)MIL-STD-129 Marking for Shipment and Storage2.3 Automotive Industry Action Group Standard:4AIAG B-5 02.00 Primary Metals Identification Tag Applica-tion Standard3. Terminology3.1 Definitions:3.1.1 coating class (regular, 1, or 3)specifies the mini-mum coa

9、ting weight per unit area of uncoated wire surface.Aluminum coated wire is only specified in one class.3.1.2 coating finish (1 or 2)specifies whether a coating isapplied prior to or after the final cold drawing operation.3.1.3 coating type (A, B, or C)specifies the required alloycontent of the coati

10、ng.3.1.4 tensile class (I or II)specifies the tensile range towhich the wire is to conform.4. Ordering Information4.1 Orders for material under this specification shouldinclude the following information:4.1.1 Quantity (weight),4.1.2 Diameter, finish, class of coating if applicable, type ofmetallic c

11、oating, class of tensile strength, name of material,4.1.3 ASTM designation and date of issue,4.1.4 Packaging (Section 15),4.1.5 Cast or heat analysis report, if desired (Section 6), and4.1.6 Test report, if desired (Section 14).NOTE 1A typical ordering description is as follows: 30 000 lb 0.120in. F

12、inish 2, Class 1, Type B Metallic Coating, Tensile Class II, SteelMechanical Spring Wire in 400-lb, 22-in. coils to ASTM A764, dated.1This specification is under the jurisdiction of ASTM Committee A05 onMetallic-Coated Iron and Steel Products and is under the direct responsibility ofSubcommittee A05

13、.12 on Wire Specifications.Current edition approved Sept. 1, 2017. Published September 2017. Originallyapproved in 1979. Last previous edition approved in 2012 as A764 12. DOI:10.1520/A0764-07R17.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at

14、 serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Available from Standardization Documents Order Desk, Bldg. 4, Section D,700 Robbins Ave., Philadelphia, PA 19111-5094, ATTN: NPODS.4Available from Automotive Indust

15、ry Action Group, 26200 Lahser Rd., Suite200, Southfield, MI 48034, www.aiag.org.*A Summary of Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United StatesThis international standard was developed

16、in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.15. Materials and Manufac

17、ture5.1 The base metal of the wire shall be of good commercialquality steel. The steel may be either ingot cast or strand cast.5.2 A sufficient discard shall be made to ensure freedomfrom injurious piping and undue segregation.5.3 The wire shall be cold drawn to produce the desiredmechanical propert

18、ies.5.4 Each coil shall be of one continuous length. Only weldsmade prior to cold drawing are permitted, unless otherwiseagreed upon at the time of the purchase or contract.5.5 The material shall be metallic coated prior to colddrawing, or at an intermediate stage of cold drawing (Finish 1),or shall

19、 be metallic coated after the final cold drawing (Finish2).5.6 The wire shall be furnished with one of three types ofmetallic coating, as specified:5.6.1 Type AAluminum coated (aluminized),5.6.2 Type BZinc coated (galvanized), or5.6.3 Type CZinc-5 % aluminum-mischmetal (Zn-5Al-MM) alloy coated.5.7 C

20、oating Types A and C shall be produced by a hot-dipprocess. Coating Type B may be produced by either a hot-dipor an electrolytic process at the option of the producer.5.8 The slab zinc for Coating Type B shall be any grade ofzinc conforming to Specification B6.5.9 The ingot used for Coating Type C s

21、hall conform toSpecification B750.6. Chemical Requirements6.1 The steel shall conform to the requirements for chemicalcomposition prescribed in Table 1.6.2 Cast or Heat AnalysisEach cast or heat of steel shallbe analyzed by the manufacturer to determine compliance withthe percentage of elements pres

22、cribed in Table 1. This analysisshall be from a test specimen preferably taken during thepouring of the cast or heat. When required, this shall bereported to the purchaser.6.3 Product AnalysisAn analysis may be made by thepurchaser from finished wire representing each cast or heat ofsteel. The chemi

23、cal composition thus determined, as to ele-ments required or restricted, shall conform to the productanalysis requirements specified in Table 10 of SpecificationA510.6.4 For referee purposes, Test Methods, Practices, andTerminology A751 shall be used.7. Mechanical Requirements7.1 Tension Test:7.1.1

24、RequirementsThe material as represented by tensiontest specimens shall conform to the requirements prescribed inTable 2 or Table 3 for the various sizes and specified class.7.1.2 Test MethodThe tension test shall be made inaccordance with Test Methods A370, Supplement IV.7.2 Wrap Test:7.2.1 Requirem

25、entFinish 1 (drawn to size metallic coated)wire shall withstand wrapping on a mandrel as shown in Table4 without the steel base fracturing or the metallic coatingpeeling or flaking to such an extent that coating metal can beremoved by rubbing with the bare fingers. Finish 2 (metalliccoated at size)

26、wire shall withstand wrapping on a mandrel asshown in Table 5 without the steel base fracturing or themetallic coating peeling or flaking to such an extent thatcoating metal can be removed by rubbing with the bare fingers.Loosening or detachment, during the wrap test, of superficial,small particles

27、of coating metal formed by mechanical polish-ing of the metallic coated wire shall not be considered cause forrejection.7.2.2 Test MethodThe wrap test shall be made in accor-dance with Test Methods A370, Supplement IV.7.3 Metallic Coating.7.3.1 Requirement:7.3.1.1 For metallic coating Type A, the wi

28、re shall conformto the minimum weight of coating prescribed in Table 6.7.3.1.2 For metallic coating Type B or Type C, the wire shallconform to the minimum weight of coating for Coating Class1 or 3 prescribed in Table 7. Regular coating has no minimumrequirement.7.3.2 Test Methods:7.3.2.1 The weight

29、of coating test for metallic coating TypeA shall be made in accordance with Test Method A428/A428M.7.3.2.2 The weight of coating test for metallic coating TypeB or Type C shall be made in accordance with Test MethodA90/A90M.8. Dimensions and Permissible Variations8.1 The diameter of the wire shall n

30、ot vary from thatspecified by more than the tolerances specified in Table 8 orTable 9.9. Workmanship, Finish, and Appearance9.1 The surface of Finish 1, drawn metallic coated wire,shall be smooth and free from defects such as seams, pits, diemarks, and other defects tending to impair the use of the

31、wirefor springs.9.2 The surface of Finish 2, metallic coated at wire size,shall be free of slivers, scale, and other defects tending toimpair the use of this wire for springs. The metallic coatingshall be smooth and continuous. If a sample does not demon-strate a smooth and continuous coating, one s

32、ample shall be cutfrom each end of the coil and examined.TABLE 1 Chemical RequirementsElement Composition, %Carbon 0.450.85AManganese 0.301.30BPhosphorus, max 0.040Sulfur, max 0.050Silicon 0.100.35ACarbon in any one lot shall not vary by more than 0.13 %.BManganese in any one lot shall not vary by m

33、ore than 0.30 %.A764 07 (2017)29.3 The wire shall be packaged so that it can be unwound ina trouble-free manner.10. Sampling10.1 Alot shall consist of all of the coils of wire of the samesize, type of coating, tensile strength class, metallic coatingtype, finish, and heat or cast offered for inspect

34、ion at one time.A wire sample of sufficient length, approximately 4 ft (1.2 m),shall be cut from either end of each coil selected for testsdescribed in 7.1, 7.2, and 7.3.11. Number of Tests and Retests11.1 The number of test specimens taken from the ends ofcoils during production to ensure complianc

35、e with 7.1, 7.2, and7.3 varies with the quality control procedures and the manu-facturing facilities of each manufacturer, but is generally notless than 10 % of the coils produced. For the purpose of finalproduct testing, one specimen from every ten coils, or afraction thereof, in a lot shall be sel

36、ected at random, or a totalof seven specimens, whichever is less.11.2 Should one or more of the wire specimens fail anyrequirement, the lot shall be subjected to retest. For retestpurposes the original lot shall be regrouped into 50 coil lots orfractions thereof. Each lot shall be tested for the pro

37、perty inwhich the original sample failed to comply at a frequency of10 % or more so that the total number of tests is at least doubleTABLE 2 Tensile RequirementsAFinish 1 (Drawn to Size Metallic Coated), Regular or Class 1 Coating (One Class on Coating Type A)Wire Diameter,Bin. (mm)Tensile Class I T

38、ensile Class IITensile Strength, ksi (MPa) Tensile Strength, ksi (MPa)min max min max0.032 (0.81)C253 (1740) 306 (2110) 292 (2010) 347 (2390)0.035 (0.89)C248 (1710) 301 (2080) 287 (1980) 342 (2360)0.041 (1.04)C242 (1670) 293 (2020) 279 (1920) 332 (2290)0.048 (1.22)C236 (1630) 286 (1970) 273 (1880) 3

39、25 (2240)0.054 (1.37) 231 (1590) 279 (1920) 266 (1830) 316 (2180)0.062 (1.57) 225 (1550) 272 (1880) 259 (1790) 308 (2120)0.072 (1.83) 220 (1520) 266 (1830) 254 (1750) 301 (2080)0.080 (2.03) 216 (1490) 261 (1800) 249 (1720) 296 (2040)0.092 (2.34) 209 (1440) 253 (1740) 241 (1660) 287 (1980)0.106 (2.69

40、) 205 (1410) 248 (1710) 237 (1630) 281 (1940)0.120 (3.05) 200 (1380) 241 (1660) 230 (1590) 273 (1880)0.135 (3.43) 196 (1350) 237 (1630) 226 (1560) 269 (1850)0.148 (3.76) 193 (1330) 234 (1610) 223 (1540) 266 (1830)ATensile strength values for intermediate diameters may be interpolated.BDecimal size i

41、s rounded to three significant places in accordance with Practice E29.CThese sizes are not produced with metallic coating Type A.TABLE 3 Tensile RequirementsAFinish 2 (Metallic Coated at Size) Regular, Class 1 or Class 3 Coating (One Class on Coating Type A)Wire Diameter,Bin. (mm)Class I Class IITen

42、sile Strength, ksi (MPa) Tensile Strength, ksi (MPa)min max min max0.062 (1.57)C213 (1470) 272 (1880) 232 (1600) 291 (2010)0.072 (1.83)C209 (1440) 266 (1830) 227 (1570) 284 (1960)0.080 (2.03) 204 (1410) 261 (1800) 223 (1540) 280 (1930)0.092 (2.34) 198 (1370) 253 (1740) 216 (1490) 271 (1870)0.106 (2.

43、69) 194 (1340) 248 (1710) 212 (1460) 266 (1830)0.120 (3.05) 189 (1300) 241 (1660) 206 (1420) 258 (1780)0.135 (3.43) 185 (1280) 237 (1630) 202 (1390) 254 (1750)0.148 (3.76) 183 (1260) 234 (1610) 200 (1380) 251 (1730)0.162 (4.11) 180 (1240) 230 (1590) 196 (1350) 246 (1700)0.177 (4.50) 176 (1210) 225 (

44、1550) 192 (1320) 241 (1660)0.192 (4.88) 173 (1190) 221 (1520) 189 (1300) 237 (1630)0.207 (5.26) 171 (1180) 218 (1500) 186 (1280) 233 (1610)0.225 (5.72)C167 (1150) 214 (1480) 183 (1260) 230 (1590)0.250 (6.35)C164 (1130) 210 (1450) 179 (1230) 225 (1550)ATensile strength values for intermediate diamete

45、rs may be interpolated.BDecimal size is rounded to three significant places in accordance with Practice E29.CThese sizes are not produced with metallic coating Type A.TABLE 4 Mandrel Diameters for Steel Ductility and Adherence ofMetallic Coating Test for Finish 1 Wire (Drawn to Size MetallicCoated)W

46、ire Diameter Mandrel Diameterin. mm Class ITensileClass IITensile0.032 to0.148 incl0.81 to 3.76incl1DA2DAD equals nominal wire diameter being tested. For 1D mandrel, wire may bewound on itself.A764 07 (2017)3the original. Any lot that exhibits a failure shall be rejected.The manufacturer may test ea

47、ch coil in the failed lot for theproperty in which failure occurred and reject only the noncon-forming coils.11.3 If any test specimen exhibits obvious imperfectionsdue to cutting a sample from the coil or due to handlingdamage after the sample has been cut, it may be discarded andanother specimen s

48、ubstituted.12. Inspection12.1 Unless otherwise specified in the contract or purchaseorder, the manufacturer is responsible for the performance ofall inspection and test requirements specified in this specifica-tion. Except as otherwise specified in the contract or purchaseorder, the manufacturer may

49、 use his own or any other suitablefacilities for the performance of the inspection and testrequirements unless disapproved by the purchaser at the timethe order is placed. The purchaser shall have the right toperform any of the inspections and tests set forth in thisspecification when such inspections and tests are deemednecessary to ensure that the material conforms to prescribedrequirements.TABLE 5 Mandrel Diameters for Steel Ductility and Adherence of Metallic Coating Test for Finish 2 Wire (Metallic Coated at Size)Wire Diameter Mandrel Diameters for Vari