1、Designation: A 856/A 856M 03Standard Specification forZinc-5 % Aluminum-Mischmetal Alloy-Coated Carbon SteelWire1This standard is issued under the fixed designation A 856/A 856M; the number immediately following the designation indicates the yearof original adoption or, in the case of revision, the
2、year of last revision. A number in parentheses indicates the year of last reapproval.A superscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope*1.1 This specification covers soft, medium, and hard temperzinc-5 % aluminum-mischmetal (Zn-5 Al-MM) alloy-coate
3、dcarbon steel wire in coils for general use. The product isintended for applications requiring corrosion resistance,drawability, and formability.1.2 This specification is applicable to orders in eitherinch-pound units (as A 856) or acceptable SI units asA 856M. Inch-pound units and SI units are not
4、necessarilyequivalent; therefore, each system shall be used independentlyof the other, without combining values in any way.1.3 This specification references notes and footnotes whichprovide explanatory material. These notes and footnotes (ex-cluding those in tables and figures) shall not be consider
5、ed asrequirements of this specification.2. Referenced Documents2.1 ASTM Standards:2A 90/A 90M Test Method for Weight Mass of Coating onIron and Steel Articles with Zinc-Alloy CoatingsA 700 Practices for Packaging, Marking, and LoadingMethods for Steel Products for Domestic ShipmentA 902 Terminology
6、Relating to Metallic Coated SteelProductsB 117 Test Method of Salt Spray (Fog) TestingB 750 Specification of Zinc-5 % Aluminum-MischmetalAlloy (UNS Z38510) in Ingot Form for Hot-Dip CoatingsE 8 Test Methods of Tension Testing of Metallic MaterialsE 29 Practice for Using Significant Digits in Test Da
7、ta toDetermine Conformance with SpecificationE 47 Test Methods for Chemical Analysis of Zinc Die-Casting AlloysE 1277 Test Method for Chemical Analysis of Zinc-5 %Aluminum-Mischmetal Alloy by the ICP Argon PlasmaSpectrometric Method2.2 Military Standards:3MIL-STD-129 Marking for Shipment and Storage
8、MIL-STD-163 Steel Mill Products Preparation2.3 Federal Standards:3Fed Std. No. 123 Marking for Shipment (Civil Agencies)2.4 Other Standards:4GF-1 Standard Practice for Determination of Cerium andLanthanum Compositions in Galfan Alloy (5Al-0.04 %La-0.04 % Ce-Ba1 SHG Zn)3. Terminology3.1 DefinitionsSe
9、e Terminology A 902 for definitions ofgeneral terminology relating to metallic coated steel products.4. Classification4.1 TemperThe wire is classified with regard to mechani-cal properties by temper, which is related to tensile strengthand stiffness. The temper designations are soft, medium, andhard
10、.4.2 Coating ClassesZn-5AL-MM alloy coating on thewire is classified in a number of classes (1, 3 or A, 60, B, 100,and C) (see Table 1).5. Ordering Information5.1 Orders for material under this specification shall includethe following information:5.1.1 Quantity (weight),5.1.2 Coated wire diameter,5.
11、1.3 Class of coating (see 4.2)5.1.4 Temper (soft, medium, or hard) (see Table 2),5.1.5 Packaging requirements, and5.1.6 ASTM designation and year of issue, as A 856-for inch-pound units or A 856M- for SI units.NOTE 1A typical ordering description is as follows: 50 000 lb, 0.120-in. diameter Zn-5 Al-
12、MM alloy-coated wire, Coating Class 60, SoftTemper in 600-lb coils on tubular carriers to ASTM A 856- or 50 000kg, 3.00-mm diameter Zn-5 Al-MM alloy-coated wire, Coating Class 1,1This specification is under the jurisdiction of ASTM Committee A05 onMetallic Coated Iron and Steel Products and is the d
13、irect responsibility ofSubcommittee A05.12 on Wire Specifications.Current edition approved October 1, 2003. Published December 2003. Originallyapproved in 1986. Last previous edition approved in 1998 as A 856/A 856M - 98.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact
14、 ASTM Customer Service at 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, 700Robbins Ave., Philadelphia, PA 191115094, Attn: NPODS4Available
15、from International Lead Zinc Research Organization 2525 MeridianParkway, P.O. Box 12036, Research Triangle Park, NC 27709-2036.1*A Summary of Changes section appears at the end of this standard.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United
16、 States.Soft Temper in 1000-kg coils on tubular carriers to ASTM A 856M- .6. Materials and Manufacture6.1 The steel from which the wire is produced shall be madeby any commercially accepted steelmaking process.6.2 Coating Bath AnalysisThe bath metal used in continu-ous hot-dip Zn-5 Al-MM alloy-coate
17、d wire shall meet thechemical composition limits specified in Specification B 750.6.2.1 For a two-step coating operation where the firstcoating is zinc (hot-dip galvanizing or electrogalvanizing) thefinal bath shall be permitted to have an aluminum content of upto 7.2 % to prevent depletion of the a
18、luminum content of thebath.6.2.2 Method of AnalysisThe determination of chemicalcomposition shall be made in accordance with suitable chemi-cal (see Test Method E 47 for tin), ICP Argon Plasma Spec-trometric (see Test Methods E 1277), or other methods. In caseof dispute, the results secured by Text
19、Methods E 1277 shall bethe basis of acceptance.6.2.3 A standard practice for X-ray fluorescence spectrom-etry for determination of cerium and lanthanum in a zinc-5 %aluminum-mischmetal alloy has been established by the Inter-national Lead Zinc Research Organization (Standard PracticeGF-1). In case o
20、f dispute, the results secured by Test MethodsE 1277 shall be the basis of acceptance.7. Mechanical Properties7.1 The Zn-5 Al-MM alloy coated wire as represented bythe test specimens tested in accordance with Test Methods E 8shall conform to the tensile strength requirements prescribed inTable 2.7.2
21、 Test specimens found to contain a weld or obviousimperfections shall be discarded and another test specimenobtained to verify conformance to the tensile strength require-ments.8. Coating Tests8.1 Weight of CoatingThe Zn-5 Al-MM alloy-coated wirewhen tested in accordance with Test Method A 90/A 90M
22、shallconform to the requirements of Table 1 for minimum weight ofcoating for the class required.NOTE 2A typical ratio of 0.20 oz/ft261 g/m2 equals 200 to 240 h assalt spray test in accordance with Test Method B 117 may be used.8.2 Adherence of CoatingThe Zn-5 Al-MM alloy-coatedwire as represented by
23、 the test specimens shall be capable ofbeing wrapped in a close helix at a rate not exceeding 15turns/min around a cylindrical steel mandrel having a diameteras prescribed in Table 3 without cracking or delaminating thecoating to such an extent that any coating is removed whenrubbed with the bare fi
24、ngers. Loosening or detachment duringTABLE 1 Minimum Weight of Zn-5 AL-MM Alloy Coating per Unit Area of Uncoated Wire Surface, oz/ft2g/m2Wire Diameter Class 1 Class 3 or A Coating, Class 60 Coating, Class B Coating, Class 100 Coating, Class C Coating,in. mmAoz/ft2g/m2 oz/ft2g/m2 oz/ft2g/m2 oz/ft2g/
25、m2 oz/ft2g/m2 oz/ft2g/m20.035 0.89 0.15 46 0.45 137 n/a 0.90 275 n/a 1.35 4120.041 1.04 0.15 46 0.50 153 n/a 1.00 305 n/a 1.50 4580.048 1.22 0.15 46 0.55 168 n/a 1.10 335 n/a 1.65 5030.054 1.37 0.20 61 0.60 183 n/a 1.20 366 n/a 1.80 5490.062 1.57 0.20 61 0.65 198 n/a 1.20 366 n/a 1.80 5490.072 1.83
26、0.20 61 0.65 198 n/a 1.20 366 n/a 1.80 5490.076 1.93 0.25 76 0.70 214 .60 183 1.40 427 1.00 305 2.10 6410.080 2.03 0.25 76 0.70 214 .60 183 1.40 427 1.00 305 2.10 6410.092 2.34 0.28 85 0.75 229 .60 183 1.50 458 1.00 305 2.25 6860.099 2.51 0.28 85 0.80 244 .60 183 1.60 488 1.00 305 2.40 7320.106 2.69
27、 0.30 92 0.80 244 .60 183 1.60 488 1.00 305 2.40 7320.120 3.05 0.30 92 0.85 259 .60 183 1.70 519 1.00 305 2.55 7780.135 3.43 0.30 92 0.85 259 .60 183 1.70 519 1.00 305 2.55 7780.148 3.76 0.35 107 0.90 275 .60 183 1.80 549 1.00 305 2.70 8240.162 4.11 0.35 107 0.90 275 .60 183 1.80 549 1.00 305 2.70 8
28、240.177 4.50 0.44 134 0.90 275 .60 183 1.80 549 1.00 305 2.70 8240.192 4.88 0.50 153 1.00 305 .60 183 2.00 610 1.00 305 3.00 9150.207 5.26 0.53 162 1.00 305 .60 183 2.00 610 1.00 305 3.00 915and largerACoating weights mass for diameters other than those shown in Table 1 are the coating weights mass
29、for the next smaller diameter.TABLE 2 Tensile Strength for Temper DesignationAWire Diameter, in. mm Soft, ksi MPa Medium, ksi MPa Hard, ksi MPa0.035 to under 0.080 0.20 to under 2.00 75 515, max 70 to 100 485 to 690 90 to 120 820 to 8250.080 to under 0.106 2.00 to under 2.50 75 515, max 70 to 95 485
30、 to 655 85 to 115 585 to 7950.106 to 0.176 2.50 to under 4.70, incl 70 485, max 65 to 90 450 to 620 80 to 110 550 to 760Over 0.176 4.70 70 485, max 60 to 85 415 to 585 75 to 105 515 to 725AFor the purpose of determining conformance with this specification, an observed value shall be rounded to the n
31、earest 1 ksi in accordance with the rounding methodof Practice E 29.TABLE 3 Mandrel Diameters for Test for Adherence of Zn-5Al-MM Alloy-CoatingWire Diameter, in. mmMandrel Diameters for CoatingClassesClass 1 All Other Classes0.035 to under 0.076 0.20 tounder 1.901dA2dA0.076 to under 0.148 1.90 tound
32、er 3.701d 3d0.148 to 0.500, incl over 3.70 2d 4dAd = nominal wire diameter being tested.A 856/A 856M 032the adhesion test of superficial, small particles of Zn-5 Al-MMalloy formed by mechanical polishing of the surface of thecoated wire shall not be considered cause for rejection.9. Permissible Vari
33、ations9.1 The permissible variation in diameter of the Zn-5A1-MM alloy-coated wire as represented by the test specimensshall meet the requirements shown in Table 4.10. Workmanship, Finish, and Appearance10.1 The Zn-5 Al-MM alloy-coated wire shall be free ofslivers, scale, and other imperfections not
34、 consistent with goodcommercial practice. The coating shall be continuous andreasonably uniform. To ensure large continuous length coils,welds are permitted in the finished wire.11. Number of Tests and Retests11.1 The number of test specimens taken from the ends ofcoils during production to ensure c
35、ompliance with Sections 7,9, and 8 vary with the quality control procedures and themanufacturing facilities of each manufacturer but is generallynot less than 10 % of the coils produced. For the purpose offinal product testing, one specimen from every ten coils orfraction thereof in a lot shall be s
36、elected at random or a total ofseven specimens, whichever is less.11.2 A wire sample of sufficient length, approximately 4 ft1.2 m, shall be cut from either end of each coil selected fortests described in Sections 7, 9, and 8.11.3 If one or more of the wire specimens fail any require-ment, the lot s
37、hall be subjected to retest. For retest purposes,the original lot shall be regrouped into 50 coil lots or fractionsthereof. Each lot shall be 10 % tested for the property in whichthe original sample failed to comply. The number of samplesthus selected shall be at least twice the number of the origin
38、alsampling. Any lot that exhibits a failure shall be rejected.11.3.1 The manufacturer has the option of testing each coilin the failed lot for the property in which the failure occurred,rejecting the nonconforming coils. The coils which conformfor the property tested shall be accepted.12. Inspection
39、12.1 Unless otherwise specified in the purchase order orcontract, the manufacturer is responsible for the performanceof all inspection and test requirements specified in this speci-fication. Except as otherwise specified in the purchase order orcontract, the manufacturer shall use his own or any oth
40、ersuitable facilities for the performance of the inspection and testrequirements, at his option, unless disapproved by the pur-chaser at the time the order is placed. The purchaser shall havethe right to perform any of the inspections and tests set forth inthis specification when such inspections an
41、d tests are deemednecessary to ensure that the material conforms to prescribedrequirements.13. Rejection and Rehearing13.1 Material that fails to conform to the requirements ofthis specification is subject to rejection. Rejection shall bereported to the producer or supplier promptly and in writing.
42、Incase of dissatisfaction with the results of the test, the produceror supplier shall make claim for a rehearing.14. Certification14.1 When specified in the purchase order or contract, aproducers or suppliers certification shall be furnished to thepurchaser that the material was manufactured, sample
43、d, tested,and inspected in accordance with this specification and hasbeen found to meet the requirements. When specified in thepurchase order or contract, a report of the test results shall befurnished.15. Packaging and Marking15.1 Unless otherwise specified, packaging, marking, andloading for shipm
44、ent shall be in accordance with PracticesA 700.15.2 When specified in the contract or order, and for directprocurement by or direct shipment to the U.S. Government,when Level A is specified, preservation, packaging, and pack-ing shall be in accordance with the Level A requirement ofMIL-STD-163.15.3
45、When specified in the contract or order, and for directprocurement by or direct shipment to the U.S. Government,marking for shipment, in addition to requirements specified inthe contract or order, shall be in accordance with MIL-STD-129 for U.S. military agencies and in accordance with Fed. Std.No.
46、123 for U.S. Government civil agencies.16. Keywords16.1 steel wire; wire; zinc-5 % aluminum-mischmetal alloy-coated carbon steel wire; zinc-5 % aluminum-mischmetal alloycoated steel wireTABLE 4 Diameter Tolerance for Zn-5 Al-MM Alloy-Coated Wirein CoilsA,BWire Diameter, in. mmTolerance, Plus and Min
47、us, in. mmClass 1 All Other Classes0.035 to under 0.076 0.002 0.05 0.002 0.050.20 to under 1.900.076 to 0.500, inclusive 0.003 0.08 0.004 0.10)1.90 to 12.7, inclusiveAFor the purpose of determining conformance with this specification, anobserved value shall be rounded to the nearest 0.001 in. 0.01 m
48、m in accordancewith the rounding method of Practice E 29.BIt is recognized that the surface of heavy alloy coatings, particularly thoseproduced by the hot-dip method, are not perfectly smooth and devoid of irregu-larities. The tolerances shown in Table 4 shall not be rigidly applied to suchirregularities that are inherent to the product so that unjustified rejections of wirethat are actually satisfactory for use do not occur. Therefore, it is intended thatthese tolerances be used in gaging the uniform areas of the Zn-5 Al-MMalloy-coated wire.A 856/A
