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Designation: A924/A924M − 26Standard Specif i cation forGeneral Requirements for Steel Sheet, Metallic-Coated bythe Hot-Dip Process 1This standard is issued under the f i xed designation A924/A924M; the number immediately following the designation indicates the yearof original adoption or, in the case 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. Scope*1.1 This specif i cation covers the general requirements that,unless otherwise specif i ed in the product specif i cation, apply tosteel sheet in coils and cut lengths, metallic-coated on continu-ous lines by the hot-dip process. The product is intended forapplications requiring corrosion resistance. The product speci-f i cations contain requirements for specif i c strength levels, heatresistance, paintability, or formability, or a combinationthereof.1.2 Subject to individual product specif i cation provisions,steel sheet is available as Commercial Steel (CS) Types A, B,and C, Forming Steel (FS), Drawing Steel (DS), Deep DrawingSteel (DDS), Extra Deep Drawing Steel (EDDS), High Tem-perature Steel (HTS), Structural Steel (SS), and High StrengthLow Alloy Steel (HSLAS). Steel sheet is produced with thefollowing metallic coatings. Specif i c information on each ofthe following is contained in the individual product specif i ca-tion: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 Type 1 and Type 2,1.2.4 Aluminum or aluminum-silicon alloy coated,1.2.5 Zinc-aluminum-magnesium alloy coated.1.3 Products covered by this general requirements specif i -cation are described in the following product standards: Speci-f i cations A463/A463M; A653/A653M; A755/A755M; A792/A792M; A875/A875M; A929/A929M; A1046/A1046M;A1057/A1057M; A1063/A1063M; and A1079.1.4 Metallic-coated steel sheet is produced to various coat-ing designations, as shown in the individual product specif i ca-tions. Except for differentially coated sheet, the coating isalways expressed as the total coating of both surfaces.1.5 In case of any conf l ict in requirements, the requirementsof the individual product specif i cations shall prevail over thoseof this general specif i cation.1.6 The purchaser is permitted to specify additional require-ments that do not negate any of the provisions of this generalspecif i cation or of the individual product specif i cations. Suchadditional requirements, the acceptance of which are subject tonegotiation with the supplier, shall be included in the orderinformation.1.7 For purposes of determining conformance with thisspecif i cation and the various product specif i cations referencedin 1.3, measured values, calculated values, or observed valuesshall be rounded to the nearest unit in the right-hand place off i gures used in expressing the limiting values (except to thenearest 5 MPa for SI strength values) in accordance with therounding method of Practice E29.1.7.1 Ordered values, identif i ed in tables, specif i ed such asover 30 through 48 or 30 exclusive to 48 inclusive, cover allordered values specif i ed as 30.1, 30.01, 30.001 etc., up to andincluding 48.000 etc., but does not cover ordered valuesspecif i ed as 30.000 etc., or less, nor does it cover orderedvalues specif i ed as 48.1, 48.01, 48.001 etc.1.8 Metallic-coated steel sheet covered by this specif i cationis produced to thickness requirements expressed to 0.001 in.[0.01 mm] for both coils and cut lengths. The thickness is thetotal of the base steel and the coating.1.9 The text of this specif i cation references notes andfootnotes that provide explanatory material. These notes andfootnotes (excluding those in tables and f i gures) shall not beconsidered as requirements of the specif i cation.1.10 Units—The values stated in either SI units or inch-pound units are to be regarded separately as standard. Thevalues stated in each system are not necessarily exact equiva-lents; therefore, to ensure conformance with the standard, eachsystem shall be used independently of the other, and valuesfrom the two systems shall not be combined.1.11 This specif i cation and some of the applicable productspecif i cations are expressed in both inch-pound and SI units.However, unless the order specif i es the applicable “M” speci-f i cation designation (SI units), the product shall be furnished toinch-pound units.1.12 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is the1 This specif i cation is under the jurisdiction of ASTM Committee A05 onMetallic-Coated Iron and Steel Products and is the direct responsibility ofSubcommittee A05.11 on Sheet Specif i cations.Current edition approved July 1, 2026. Published July 2026. Originally approvedin 1994. Last previous edition approved in 2025 as A924/A924M – 25a. DOI:10.1520/A0924_A0924M-26.*A Summary of Changes section appears at the end of this standardCopyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.1