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This specification covers the general requirements for steel sheet in coils and cut length, metallic-coated on continuous lines by the hot-dip process. This material is intended for applications requiring corrosion resistance. Hot-dip metallic coatings are available in six different types: zinc and zinc-iron alloy, lead-tin alloy, aluminum, aluminum-zinc alloy, zinc-aluminum alloy, and zinc-aluminum-magnesium alloy. Heat analysis shall be made to determine the percentage of carbon, manganese, phosphorus, sulfur, and other elements specified. Product analysis and coating analysis shall also be done. Mechanical properties shall be determined by tension tests. The following are tests for coating properties: coating weight test and coating bend test. There are two methods that shall be used for coating weight test: weigh-strip-weigh method and X-ray fluorescence method.
This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.
1.1 This specification covers the general requirements that, unless otherwise specified in the product specification, apply to steel sheet in coils and cut lengths, metallic-coated on continuous lines by the hot-dip process. The product is intended for applications requiring corrosion resistance. The product specifications contain requirements for specific strength levels, heat resistance, paintability, or formability, or a combination thereof.
1.2 Subject to individual product specification provisions, steel sheet is available as Commercial Steel (CS) Types A, B, and C, Forming Steel (FS), Drawing Steel (DS), Deep Drawing Steel (DDS), Extra Deep Drawing Steel (EDDS), High Temperature Steel (HTS), Structural Steel (SS), and High Strength Low Alloy Steel (HSLAS). Steel sheet is produced with the following metallic coatings. Specific information on each of the following is contained in the individual product specification:
1.2.1 Zinc or zinc-iron alloy coated,
1.2.2 Zinc-5 % aluminum alloy coated,
1.2.3 55 % aluminum-zinc alloy coated,
1.2.4 Aluminum or aluminum-silicon alloy coated,
1.2.5 Zinc-aluminum-magnesium alloy coated.
1.3 Products covered by this general requirements specification are described in the following product standards: Specifications ; ; ; ; ; ; ; ; ; and .
1.4 Metallic-coated steel sheet is produced to various coating designations, as shown in the individual product specifications. Except for differentially coated sheet, the coating is always expressed as the total coating of both surfaces.
1.5 In case of any conflict in requirements, the requirements of the individual product specifications shall prevail over those of this general specification.
1.6 The purchaser is permitted to specify additional requirements that do not negate any of the provisions of this general specification or of the individual product specifications. Such additional requirements, the acceptance of which are subject to negotiation with the supplier, shall be included in the order information.
1.7 For purposes of determining conformance with this specification and the various product specifications referenced in , measured values, calculated values, or observed values shall be rounded to the nearest unit in the right-hand place of figures used in expressing the limiting values (except to the nearest 5 MPa for SI strength values) in accordance with the rounding method of Practice .
1.7.1 Ordered values, identified in tables, specified such as over 30 through 48 or 30 exclusive to 48 inclusive, covers all ordered values specified as 30.1, 30.01, 30.001 etc., up to and including 48.000 etc., but does not cover ordered values specified as 30.000 etc., or less, nor does it cover ordered values specified as 48.1, 48.01, 48.001 etc.
1.8 Metallic-coated steel sheet covered by this specification is produced to thickness requirements expressed to 0.001 in. [0.01 mm] for both coils and cut lengths. The thickness is the total of the base steel and the coating.
1.9 The text of this specification references notes and footnotes that provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of the specification.
1.10 Units—The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined.
1.11 This specification and some of the applicable product specifications are expressed in both inch-pound and SI units. However, unless the order specifies the applicable “M” specification designation (SI units), the product shall be furnished to inch-pound units.
1.12 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 appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.13 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
A90/A90M Test Method for Weight [Mass] of Coating on Iron and Steel Articles with Zinc or Zinc-Alloy Coatings
A370 Test Methods and Definitions for Mechanical Testing of Steel Products
A428/A428M Test Method for Weight [Mass] of Coating on Aluminum-Coated Iron or Steel Articles
A463/A463M Specification for Steel Sheet, Aluminum-Coated, by the Hot-Dip Process
A653/A653M Specification for Steel Sheet, Zinc-Coated (Galvanized) or Zinc-Iron Alloy-Coated (Galvannealed) by the Hot-Dip Process
A700 Guide for Packaging, Marking, and Loading Methods for Steel Products for Shipment
A751 Test Methods, Practices, and Terminology for Chemical Analysis of Steel Products
A754/A754M Test Method for Coating Weight (Mass) of Metallic Coatings on Steel by X-Ray Fluorescence
A755/A755M Specification for Steel Sheet, Metallic Coated by the Hot-Dip Process and Prepainted by the Coil-Coating Process for Exterior Exposed Building Products
A792/A792M Specification for Steel Sheet, 55% Aluminum-Zinc Alloy-Coated by the Hot-Dip Process
A875/A875M Specification for Steel Sheet, Zinc-5 % Aluminum Alloy-Coated by the Hot-Dip Process
A902 Terminology Relating to Metallic Coated Steel Products
A929/A929M Specification for Steel Sheet, Metallic-Coated by the Hot-Dip Process for Corrugated Steel Pipe
A1030/A1030M Practice for Measuring Flatness Characteristics of Steel Sheet Products
A1046/A1046M Specification for Steel Sheet, Zinc-Aluminum-Magnesium Alloy-Coated by the Hot-Dip Process
A1057/A1057M Specification for Steel, Structural Tubing, Cold Formed, Welded, Carbon, Zinc-Coated (Galvanized) by the Hot-Dip Process
A1063/A1063M Specification for Steel Sheet, Twin-Roll Cast, Zinc-Coated (Galvanized) by the Hot-Dip Process
A1073/A1073M Practice for Using Hand Micrometers to Measure the Thickness of Uncoated Steel Sheet and Nonmetallic and Metallic-Coated Steel Sheet
A1079 Specification for Steel Sheet, Complex Phase (CP), Dual Phase (DP) and Transformation Induced Plasticity (TRIP), Zinc-Coated (Galvanized) or Zinc-Iron Alloy-Coated (Galvannealed) by the Hot-Dip Process
A1087/A1087M Practice for Using Hand Calipers to Measure the Width of Steel Sheet
E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
E376 Practice for Measuring Coating Thickness by Magnetic-Field or Eddy Current (Electromagnetic) Testing Methods
Federal StandardFed. Std. No. 123 Marking for Shipment (Civil Agencies)
ICS Number Code 25.220.40 (Metallic coatings)
UNSPSC Code 30264000(Carbon steel sheets)
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ASTM A924 / A924M-19, Standard Specification for General Requirements for Steel Sheet, Metallic-Coated by the Hot-Dip Process, ASTM International, West Conshohocken, PA, 2019, www.astm.orgBack to Top