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ASTM A856-03(R2020) pdf free download

ASTM A856-03(R2020) pdf free download.Standard Specification for Zinc-5 % Aluminum-Mischmetal Alloy-Coated Carbon Steel Wire
1. Scope
1.1 This specification covers soft, medium, and hard temper zinc-5 % aluminum-mischmetal (Zn-5 Al-MM) alloy-coated carbon steel wire in coils for general use. The product is intended for applications requiring corrosion resistance, drawability, and formability. 1.2 This specification is applicable to orders in either inch-pound units (as A856) or acceptable SI units [as A856M]. Inch-pound units and SI units are not necessarily equivalent; therefore, each system shall be used independently ofthe other, without combining values in any way. 1.3 This specification references notes and footnotes which provide explanatory material. These notes and footnotes (ex- cluding those in tables and figures) shall not be considered as requirements of this specification. 1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appro- priate safety, health, and environmental practices and deter- mine the applicability ofregulatory limitations prior to use. 1.5 This international standard was developed in accor- dance with internationally recognized principles on standard- ization established in the Decision on Principles for the Development of International Standards, Guides and Recom- mendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
6. Materials and Manufacture
6.1 The steel from which the wire is produced shall be made by any commercially accepted steelmaking process. 6.2 Coating Bath Analysis—The bath metal used in continu- ous hot-dip Zn-5 Al-MM alloy-coated wire shall meet the chemical composition limits specified in Specification B750. 6.2.1 For a two-step coating operation where the first coating is zinc (hot-dip galvanizing or electrogalvanizing) the final bath shall be permitted to have an aluminum content ofup to 7.2 % to prevent depletion of the aluminum content of the bath. 6.2.2 Method of Analysis—The determination of chemical composition shall be made in accordance with suitable chemi- cal (see Test Method E47 for tin), ICP Argon Plasma Spectro- metric (see Test Methods E1277), or other methods. In case of dispute, the results secured by Test Methods E1277 shall be the 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 Practice GF-1). In case of dispute, the results secured by Test Methods E1277 shall be the basis of acceptance.
8. Coating Tests:
8.1 Weight ofCoating—The Zn-5 Al-MM alloy-coated wire when tested in accordance with Test Method A90/A90M shall conform to the requirements ofTable 1 for minimum weight of coating for the class required. N OTE 2—A typical ratio of 0.20 oz/ft 2 [61 g/m 2 ] equals 200 to 240 h as salt spray test in accordance with Test Method B117 may be used. 8.2 Adherence of Coating—The Zn-5 Al-MM alloy-coated wire as represented by the test specimens shall be capable of being wrapped in a close helix at a rate not exceeding 15 turns/min around a cylindrical steel mandrel having a diameter as prescribed in Table 3 without cracking or delaminating the coating to such an extent that any coating is removed when rubbed with the bare fingers. Loosening or detachment during the adhesion test of superficial, small particles of Zn-5 Al-MM alloy formed by mechanical polishing of the surface of the coated wire shall not be considered cause for rejection.Unless otherwise specified in the purchase order or contract, the manufacturer is responsible for the performance of all inspection and test requirements specified in this speci- fication. Except as otherwise specified in the purchase order or contract, the manufacturer shall use his own or any other suitable facilities for the performance ofthe inspection and test requirements, at his option, unless disapproved by the pur- chaser at the time the order is placed. The purchaser shall have the right to perform any of the inspections and tests set forth in this specification when such inspections and tests are deemed necessary to ensure that the material conforms to prescribed requirements.

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