ASTM_A_924_-_A_924M_-_17.pdf

Designation:A924/A924M17Standard Specification forGeneral Requirements for Steel Sheet,Metallic-Coated bythe Hot-Dip Process1This standard is issued under the fixed 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 specification covers the general requirements that,unless otherwise specified in the product specification,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-fications contain requirements for specific strength levels,heatresistance,paintability,or formability,or a combinationthereof.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 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.Specific information on each ofthe following is contained in the individual product specifica-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,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 specifi-cation are described in the following product standards:Speci-fications 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 specifica-tions.Except for differentially coated sheet,the coating isalways expressed as the total coating of both surfaces.1.5 In case of any conflict in requirements,the requirementsof the individual product specifications shall prevail over thoseof this general specification.1.6 The purchaser is permitted to specify additional require-ments that do not negate any of the provisions of this generalspecification or of the individual product specifications.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 thisspecification and the various product specifications referencedin 1.3,values shall be rounded to the nearest unit in theright-hand place of figures used in expressing the limitingvalues(except to the nearest 5 MPa for SI strength values)inaccordance with the rounding method of Practice E29.1.8 Metallic-coated steel sheet covered by this specificationis 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 specification references notes andfootnotes that provide explanatory material.These notes andfootnotes(excluding those in tables and figures)shall not beconsidered as requirements of the specification.1.10 The values stated in inch-pound units or SI units are tobe regarded separately as standard.Within the text,the SI unitsare shown in brackets.The values stated in each system are notexact equivalents;therefore,each system must be used inde-pendently of the other.1.11 This specification and some of the applicable productspecifications are expressed in both inch-pound and SI units.However,unless the order specifies the applicable“M”speci-fication 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 theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.1.13 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.1This specification is under the jurisdiction of ASTM Committee A05 onMetallic-Coated Iron and Steel Products and is the direct responsibility of Subcom-mittee A05.11 on Sheet Specifications.Current edition approved May 1,2017.Published May 2017.Originallyapproved in 1994.Last previous edition approved in 2016a as A924/A924M-16A.DOI:10.1520/A0924_A0924M-17.*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 inter