1、Designation: A856/A856M 03 (Reapproved 2014)Standard Specification forZinc-5 % Aluminum-Mischmetal Alloy-Coated Carbon SteelWire1This standard is issued under the fixed designation A856/A856M; the number immediately following the designation indicates the yearof original adoption or, in the case of
2、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-MM)
3、 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 A856) or acceptable SI units as A856M.Inch-pound units and SI unit
4、s are not necessarily equivalent;therefore, each system shall be used independently of 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 b
5、e considered asrequirements of this specification.2. Referenced Documents2.1 ASTM Standards:2A90/A90M Test Method for Weight Mass of Coating onIron and Steel Articles with Zinc or Zinc-Alloy CoatingsA700 Practices for Packaging, Marking, and Loading Meth-ods for Steel Products for Shipment (Withdraw
6、n 2014)3A902 Terminology Relating to Metallic Coated Steel Prod-uctsB117 Practice for Operating Salt Spray (Fog) ApparatusB750 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 Usi
7、ng Significant Digits in Test Data toDetermine Conformance with SpecificationsE47 Test Methods for Chemical Analysis of Zinc Die-Casting Alloys (Withdrawn 1997)3E1277 Test Method for Chemical Analysis of Zinc-5 %Aluminum-Mischmetal Alloys by ICP Emission Spec-trometry2.2 Military Standards:4MIL-STD-
8、129 Marking for Shipment and 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 SH
9、G Zn)3. Terminology3.1 Definitions See Terminology A902 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 de
10、signations are soft, medium, 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 (w
11、eight),5.1.2 Coated wire diameter,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, and1This specification is under the jurisdiction of ASTM Committee A05 onMetallic-Coated Iron and Steel Products and is the direct responsibility ofSubco
12、mmittee A05.12 on Wire Specifications.Current edition approved Nov. 1, 2014. Published November 2014. Originallyapproved in 1986. Last previous edition approved in 2009 as A856/A856M - 03(2009). DOI: 10.1520/A0856_A0856M-03R14.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orc
13、ontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3The last approved version of this historical standard is referenced onwww.astm.org.4Available from Standardization Documents Order De
14、sk, Bldg. 4 Section D, 700Robbins Ave., Philadelphia, PA 191115094, Attn: NPODS5Available from International Lead Zinc Research Organization 2525 MeridianParkway, P.O. Box 12036, Research Triangle Park, NC 27709-2036.*A Summary of Changes section appears at the end of this standardCopyright ASTM Int
15、ernational, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States15.1.6 ASTM designation and year of issue, as A856- forinch-pound units or A856M- for SI units.NOTE 1A typical ordering description is as follows: 50 000 lb, 0.120-in. diameter Zn-5 Al-MM alloy-coated wire
16、, Coating Class 60, SoftTemper in 600-lb coils on tubular carriers to ASTM A856- or 50 000kg, 3.00-mm diameter Zn-5 Al-MM alloy-coated wire, Coating Class 1,Soft Temper in 1000-kg coils on tubular carriers to ASTM A856M- .6. Materials and Manufacture6.1 The steel from which the wire is produced shal
17、l 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 specified in Specification B750.6.2.1 For a two-step coating operation where the firstcoating is zinc (
18、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 determination of chemicalcomposition shall be made in accordance with suitable chemi-cal (see Test
19、 Method E47 for tin), ICP Argon Plasma Spectro-metric (see Test Methods E1277), or other methods. In case ofdispute, the results secured by Text Methods E1277 shall be thebasis of acceptance.6.2.3 A standard practice for X-ray fluorescence spectrom-etry for determination of cerium and lanthanum in a
20、 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 MethodsE1277 shall be the basis of acceptance.7. Mechanical Properties7.1 The Zn-5 Al-MM alloy coated wire as represe
21、nted 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 obviousimperfections shall be discarded and another test specimenobtained to verify conformance to the tensile stre
22、ngth require-ments.8. Coating Tests:8.1 Weight of CoatingThe Zn-5 Al-MM alloy-coated wirewhen tested in accordance with Test Method A90/A90M 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
23、 assalt spray test in accordance with Test Method B117 may 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 close helix at a rate not exceeding 15turns/min around a cylindrical steel mandrel having a diameteras
24、 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 duringthe adhesion test of superficial, small particles of Zn-5 Al-MMTABLE 1 Minimum Weight of Zn-5 AL-MM Alloy Coating per Unit
25、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 0.90 275 n/a 1.35 4120.041 1.04 0.15 46 0
26、.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 0.70 214 .60 183 1.40 427 1.00 305 2
27、.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 3.05 0.30 92 0.85 259 .60 183 1.70 519
28、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 8240.192 4.88 0.50 153 1.00 305 .60
29、 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 Temper DesignationAWire Diameter, in.
30、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, incl 70 485, max 65 to 90 450 to 6
31、20 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 method ofPractice E29.A856/A856M 03 (2014)2alloy for
32、med 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 Zn-5A1-MM alloy-coated wire as represented by the test specimensshall meet the requirements shown in Table 4.10. Workmans
33、hip, 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 shall be continuous andreasonably uniform. To ensure large continuous length coils,welds are permitted in the finished wir
34、e.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 quality control procedures and themanufacturing facilities of each manufacturer but is generallynot less than 10 % of the coils
35、 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, 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 se
36、lected fortests described in Sections 7, 9, and 8.11.3 If 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 10 % tested for the propertyin which
37、 the original sample failed to comply. The number ofsamples thus selected shall be at least twice the number of theoriginal sampling. Any lot that exhibits a failure shall berejected.11.3.1 The manufacturer has the option of testing each coilin the failed lot for the property in which the failure oc
38、curred,rejecting the nonconforming coils. The coils which conformfor the property tested shall be accepted.12. Inspection12.1 Unless otherwise specified in the purchase order orcontract, the manufacturer is responsible for the performanceof all inspection and test requirements specified in this spec
39、i-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 inspection and testrequirements, at his option, unless disapproved by the pur-chaser at the time the order is placed. The purchase
40、r 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 material conforms to prescribedrequirements.13. Rejection and Rehearing13.1 Material that fails to conform to the requirements ofthi
41、s 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, the produceror supplier shall make claim for a rehearing.14. Certification14.1 When specified in the purchase order or cont
42、ract, aproducers or suppliers certification shall be furnished to thepurchaser that the material was manufactured, sampled, 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 res
43、ults shall befurnished.15. Packaging and Marking15.1 Unless otherwise specified, packaging, marking, andloading for shipment shall be in accordance with PracticesA700.15.2 When specified in the contract or order, and for directprocurement by or direct shipment to the U.S. Government,when Level A is
44、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 directprocurement by or direct shipment to the U.S. Government,marking for shipment, in addition to requirements specified inthe co
45、ntract 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.TABLE 3 Mandrel Diameters for Test for Adherence of Zn-5Al-MM Alloy-CoatingWire Diameter, in. mmMandrel Diameters for CoatingClassesClass 1 A
46、ll 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 wire diameter being tested.TABLE 4 Diameter Tolerance for Zn-5 Al-MM Alloy-Coated Wire inCoilsA,BWire Diameter, in. mmTolerance, Plus and Minus, in.
47、 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, an observedvalue shall be rounded to the nearest 0.001 in. 0.01 mm in ac
48、cordance with therounding method of Practice E29.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.A856/A856M 03
