1、Designation: A 856/A 856M 03 (Reapproved 2009)Standard 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
2、 of revision, the year of last revision. A number in parentheses indicates the year of last reapproval.A superscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification covers soft, medium, and hard temperzinc-5 % aluminum-mischmetal (Zn-5 Al
3、-MM) alloy-coatedcarbon 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 S
4、I units are not 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
5、 not be considered 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 or Zinc-Alloy CoatingsA 700 Practices for Packaging, Marking, and LoadingMethods for Steel Products for ShipmentA 9
6、02 Terminology Relating to Metallic Coated Steel Prod-uctsB117 Practice for Operating Salt Spray (Fog) ApparatusB 750 Specification for GALFAN (Zinc-5 % Aluminum-Mischmetal) Alloy in Ingot Form for Hot-Dip CoatingsE8 Test Methods for Tension Testing of Metallic MaterialsE29 Practice for Using Signif
7、icant Digits in Test Data toDetermine Conformance with SpecificationsE47 Test Methods for Chemical Analysis of Zinc Die-Casting Alloys3E 1277 Test Method for Chemical Analysis of Zinc-5 %Aluminum-MischmetalAlloys by ICP Emission Spectrom-etry2.2 Military Standards:4MIL-STD-129 Marking for Shipment a
8、nd StorageMIL-STD-163 Steel Mill Products Preparation2.3 Federal Standards:4Fed Std. No. 123 Marking for Shipment (Civil Agencies)2.4 Other Standards:5GF-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 Def
9、initionsSee 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, mediu
10、m, andhard.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 d
11、iameter,5.1.3 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. diamete
12、r Zn-5 Al-MM alloy-coated wire, Coating Class 60, SoftTemper in 600-lb coils on tubular carriers toASTMA 856- or 50 0001This specification is under the jurisdiction of ASTM Committee A05 onMetallic-Coated Iron and Steel Products and is the direct responsibility ofSubcommittee A05.12 on Wire Specific
13、ations.Current edition approved May 1, 2009. Published August 2009. Originallyapproved in 1986. Last previous edition approved in 2003 as A 856/A 856M - 03.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of AST
14、MStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Withdrawn.4Available from Standardization Documents Order Desk, Bldg. 4 Section D, 700Robbins Ave., Philadelphia, PA 191115094, Attn: NPODS5Available from International Lead Zinc Research Organization 252
15、5 MeridianParkway, P.O. Box 12036, Research Triangle Park, NC 27709-2036.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.kg, 3.00-mm diameter Zn-5 Al-MM alloy-coated wire, Coating Class 1,Soft Temper in 1000-kg coils on tubular carri
16、ers toASTMA 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-coated wire shall meet thechemical composition limits specif
17、ied 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 aluminum content of thebath.6.2.2 Method of AnalysisThe
18、determination of chemicalcomposition shall be made in accordance with suitable chemi-cal (see Test Method E47for tin), ICP Argon Plasma Spec-trometric (see Test Methods E 1277), or other methods. In caseof dispute, the results secured by Text Methods E 1277 shall bethe basis of acceptance.6.2.3 A st
19、andard 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 of dispute, the results secured by Test MethodsE 1277 shal
20、l 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 E8shall conform to the tensile strength requirements prescribed inTable 2.7.2 Test specimens found to contain a weld or obviousimperfec
21、tions 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 MethodA 90/A 90M shallconform to the requirements of Table 1 for minimum wei
22、ght 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 B117may be used.8.2 Adherence of CoatingThe Zn-5 Al-MM alloy-coatedwire as represented by the test specimens shall be capable ofbeing wrapped in a clo
23、se 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 fingers. Loosening or detachment duringTABLE 1 Minimum Weight o
24、f 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/m2 oz/ft2g/m2 oz/ft2g/m20.035 0.89 0.15 46 0.45 137 n/a 0.90
25、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 0.20 61 0.65 198 n/a 1.20 366 n/a 1.80 5490.076 1.93 0.25 76
26、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 0.30 92 0.80 244 .60 183 1.60 488 1.00 305 2.40 7320.120 3.0
27、5 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 8240.177 4.50 0.44 134 0.90 275 .60 183 1.80 549 1.00 305 2.70
28、 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 for the next smaller diameter.TABLE 2 Tensile Strength for Te
29、mper 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 to 655 85 to 115 585 to 7950.106 to 0.176 2.50 to under 4.70
30、, 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 nearest 1 ksi in accordance with the rounding methodof Practic
31、e 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 tounder 3.701d 3d0.148 to 0.500, incl over 3.70 2d 4dAd = nominal
32、wire diameter being tested.A 856/A 856M 03 (2009)2the 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 Variations9.1 The permissible variation in diameter of the
33、 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 consistent with goodcommercial practice. The coating
34、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 compliance with Sections 7,9, and 8 vary with the quali
35、ty 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 selected at random or a total ofseven specimens, whiche
36、ver 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 shall be subjected to retest. For retest purposes,the o
37、riginal 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 originalsampling. Any lot that exhibits a failure shall be r
38、ejected.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. Inspection12.1 Unless otherwise specified in the purchase order
39、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 othersuitable facilities for the performance of the inspe
40、ction 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 and tests are deemednecessary to ensure that the materia
41、l 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. Incase of dissatisfaction with the results of the test
42、, 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, sampled, tested,and inspected in accordance with this specif
43、ication 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 shipment shall be in accordance with PracticesA 700.15.2 Wh
44、en 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 When specified in the contract or order, and for direc
45、tprocurement 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. 123 for U.S. Government civil agencies.16. Keywords16.
46、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 Minus, in. mmClass 1 All Other Classes0.035 to under 0.07
47、6 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 mm in accordancewith the rounding method of Practice E
48、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 856M 03 (2009)3ASTM International takes no position
