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ASTM A1063 - A 1063M - 11a.pdf

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ASTM A1063 - A 1063M - 11a.pdf

Designation A1063/A1063M − 11aStandard Specification forSteel Sheet, Twin-Roll Cast, Zinc-Coated Galvanized by theHot-Dip Process1This standard is issued under the fixed designation A1063/A1063M; the number immediately following the designation indicates theyear of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of lastreapproval. A superscript epsilon indicates an editorial change since the last revision or reapproval.1. Scope*1.1 This specification covers steel sheet, produced by theTwin-Roll Cast Process see Appendix X2 and zinc-coatedgalvanized by the hot-dip process in coils and cut lengths.NOTE 1See Appendix X2 for a description of the Twin-Roll Castprocess.1.2 The product is produced in various zinc coating weights[masses] or coating designations as shown in Table 1.1.3 Product furnished under this specification shall conformto the applicable requirements of the latest issue of Specifica-tion A924/A924M unless otherwise provided herein.1.4 The product is available in a number of designations,grades and classes and in the two following general categoriesthat are designed to be compatible with different applicationrequirements.1.4.1 Steels with mandatory chemical requirements andtypical mechanical properties.1.4.2 Steels with mandatory chemical requirements andmandatory mechanical properties.1.5 This material is available in the following sizes1.5.1 Thicknessup to 0.078 in. [2.0 mm]1.5.2 Widthup to 79 in. [2000 mm]1.6 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 this specification.1.7 This specification is applicable to orders in eitherinch-pound units as A1063 or SI units as A1063M. Valuesin inch-pound and SI units are not necessarily equivalent.Within the text, SI units are shown in brackets. Each systemshall be used independently of the other.1.8 Unless the order specifies the “M” designation SIunits, the product shall be furnished to inch-pound units.1.9 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.2. Referenced Documents2.1 ASTM Standards2A90/A90M Test Method for Weight [Mass] of Coating onIron and Steel Articles with Zinc or Zinc-Alloy CoatingsA370 Test Methods and Definitions for Mechanical Testingof Steel ProductsA568/A568M Specification for Steel, Sheet, Carbon,Structural, and High-Strength, Low-Alloy, Hot-Rolled andCold-Rolled, General Requirements forA902 Terminology Relating to Metallic Coated Steel Prod-uctsA924/A924M Specification for General Requirements forSteel Sheet, Metallic-Coated by the Hot-Dip Process3. Terminology3.1 DefinitionsSee Terminology A902 for definitions ofgeneral terminology relating to metallic-coated hot-dip prod-ucts.3.2 Definitions of Terms Specific to This Standard3.2.1 differentially coated, ngalvanized steel sheet havinga specified “coating designation” on one surface and a signifi-cantly lighter specified “coating designation” on the othersurface.3.2.1.1 DiscussionThe single side relationship of eitherspecified “coating designation” is the same as shown in thenote of Table 1 regarding uniformity of coating.3.2.2 high strength low alloy steel, na specific group ofsheet steels whose strength is achieved through the use ofmicroalloying elements such as columbium niobium,vanadium, titanium, and molybdenum resulting in improved1This specification is under the jurisdiction of ASTM Committee A05 onMetallic-Coated Iron and Steel Products and is the direct responsibility ofSubcommittee A05.11 on Sheet Specifications.Current edition approved Nov. 1, 2011. Published November 2011. Originallyapproved in 2009. Last previous edition approved in 2011 as A1063/A1063M - 11.DOI 10.1520/A1063_A1063M-11A.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standard’s Document Summary page onthe ASTM website.*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 States1formability and weldability than is obtained from conventionalcarbon-manganese steels.3.2.3 minimized spangle, nthe finish produced on hot-dipzinc-coated steel sheet in which the grain pattern is visible tothe unaided eye, and is typically smaller and less distinct thanthe pattern visible on regular spangle.3.2.3.1 DiscussionThis finish is produced by one of twomethods either 1 the zinc crystal growth has been started butarrested by special production practices during solidification ofthe zinc, or 2 the zinc crystal growth is inhibited by acombination of coating-bath chemistry plus cooling duringsolidification of the zinc. Minimized spangle is normallyproduced in coating designations G90 [Z275] and lighter.3.2.4 regular spangle, nthe finish produced on hot-dipzinc-coated steel sheet in which there is a visible multifacetedzinc crystal structure.3.2.4.1 DiscussionSolidification of the zinc coating istypically uncontrolled, which produces the variable grain sizeassociated with this finish.3.2.5 spangle-free, nthe uniform finish produced on hot-dip zinc-coated steel sheet in which the visual spangle pattern,especially the surface irregularities created by spangleformation, is not visible to the unaided eye.3.2.5.1 DiscussionThis finish is produced when the zinccrystal growth is inhibited by a combination of coating-bathchemistry, or cooling, or both during solidification of the zinc.4. Classification4.1 The material is available in several designations asfollows4.1.1 Commercial steel CS Types A, B, and C,4.1.2 Structural steel SS4.1.3 High strength low alloy steel HSLAS4.2 Structural steel and high-strength low-alloy steel areavailable in several grades based on mechanical properties.Structural steel Grade 80 is available in two classes andhigh-strength low-alloy grades 45 through 80 are available intwo classes.4.3 The material is available zinc-coated in several coatingweights [masses] or coating designations as shown in Table 1,and4.3.1 The material is available with the same or differentcoating designations on each surface.5. Ordering Information5.1 Zinc-coated sheet in coils and cut lengths is produced tothickness requirements expressed to 0.001 in. [0.01 mm]. Thethickness of the sheet includes both the base metal and thecoating.5.2 Orders for product to this specification shall include thefollowing information, as necessary, to adequately describe thedesired productTABLE 1 Weight [Mass] of Coating RequirementsA,B,CNOTE 1 Use the information provided in 8.1.2 to obtain the approximate coating thickness from the coating weight [mass].Minimum RequirementTriple-Spot Test Single-Spot TestInch-Pound UnitsType Coating Designation Total Both Sides, oz/ft2One Side, oz/ft2Total Both Sides, oz/ft2Zinc G01Cno minimum no minimum no minimumG30 0.30 0.10 0.25G40 0.40 0.12 0.30G60 0.60 0.20 0.50G90 0.90 0.32 0.80G100 1.00 0.36 0.90G115 1.15 0.40 1.00G140 1.40 0.48 1.20G165 1.65 0.56 1.40G185 1.85 0.64 1.60SI UnitsType Coating Designation Total Both Sides, g/m2One Side, g/m2Total Both Sides, g/m2Zinc Z001Cno minimum no minimum no minimumZ90 90 30 75Z120 120 36 90Z180 180 60 150Z275 275 94 235Z305 305 110 275Z350 350 120 300Z450 450 154 385Z500 500 170 425Z550 550 190 475Z600 600 204 510AThe coating designation number is the term by which this product is specified. Because of the many variables and changing conditions that are characteristic of continuoushot-dip coating lines, the zinc coating is not always evenly divided between the two surfaces of a coated sheet; nor is it always evenly distributed from edge to edge.However, the minimum triple-spot average coating weight mass on any one side shall not be less than 40 of the single-spot requirement.BAs it is an established fact that the atmospheric corrosion resistance of zinc coated sheet products is a direct function of coating thickness weight mass, the selectionof thinner lighter coating designations will result in almost linearly reduced corrosion performance of the coating. For example, heavier galvanized coatings performadequately in bold atmospheric exposure whereas the lighter coatings are often further coated with paint or a similar barrier coating for increased corrosion resistance.Because of this relationship, products carrying the statement “meets ASTM A1063/A1063Mrequirements” should also specify the particular coating designation.CNo minimum means that there are no established minimum requirements for triple- and single-spot tests.A1063/A1063M − 11a25.2.1 Name of product steel sheet, twin-roll cast, zinc-coated galvanized,5.2.2 Designation of sheet [CS Types A, B, and C, SSLimits L or H, and HSLAS Limits L or H].5.2.2.1 When a CS type is not specified, CS Type B will befurnished.5.2.3 When a SS or HSLAS designation is specified, statethe appropriate grade, or class, or combination thereof.5.2.3.1 When a class for SS Grade 80 is not specified, class1 will be provided5.2.3.2 When a class for HSLAS is not specified, class 1will be provided.5.2.4 Specify Limit L or Limit H for Cu, Ni, Cr, and Mo,5.2.4.1 When the limit L or H is not specified, limit H willbe furnished.5.2.5 ASTM designation number and year of issue asA1063 for inch-pound units or A1063M for SI units.5.2.6 Coating designation,5.2.7 Chemically treated or not chemically treated,5.2.8 Oiled or not oiled,5.2.9 Minimized spangle if required,5.2.10 Extra smooth if required,5.2.11 Dimensions show thickness, minimum or nominal,width, flatness requirements, and length, if cut lengths. Thepurchaser shall specify the appropriate table of thicknesstolerances in Specification A924/A924M that applies to theorder, that is, the table of thickness tolerances for3⁄8-in.[10-mm] edge distance, or the table of thickness tolerances for1-in. [25-mm] edge distance.5.2.12 Coil size requirements specify maximum outsidediameter OD, acceptable inside diameter ID, and maximumweight [mass],5.2.13 Packaging,5.2.14 Certification, if required, heat analysis and mechani-cal property report,5.2.15 Application part identification and description, and5.2.16 Special requirements if any.5.2.17 Supplementary Requirement, please specify.NOTE 2Typical ordering descriptions are as follows steel sheet,zinc-coated, commercial steel Type A, Limit H, ASTM A1063, CoatingDesignation G90, chemically treated, oiled, minimum 0.040 by 34 by 117in., for stock tanks, or steel sheet, zinc-coated, high strength low alloysteel Grade 340, class 1, Limit L, ASTM /A 1063M, Coating DesignationZ275, minimized spangle, not chemically treated, oiled, minimum 1.00 by920 mm by coil, 1520-mm maximum OD, 600-mm ID, 10 000-kgmaximum, for tractor inner fender.NOTE 3The purchaser should be aware that there are variations inmanufacturing practices among the producers and therefore is advised toestablish the producer’s standard or default procedures for thicknesstolerances.6. Chemical Composition6.1 Base Metal6.1.1 The heat analysis of the base metal shall conform tothe requirements shown in Table 2 for CS Types A, B, and C,and Table 3 for SS and HSLAS and Table 4 for Cu, Ni, Cr, andMo.6.1.2 Each of the elements listed in Tables 2-4 shall beincluded in the report of heat analysis. When the amount ofcopper, nickel, chromium, or molybdenum is less than 0.02 ,report the analysis as either 0.02 or the actual determinedvalue. When the amount of vanadium, titanium, or columbiumis less than 0.008 , report the analysis as either 0.008 orthe actual determined value.6.1.3 See Specification A924/A924M for chemical analysisprocedures and product analysis tolerances.6.2 Zinc Bath AnalysisThe bath metal used in continuoushot-dip galvanizing shall contain not less than 99 zinc.NOTE 4To control alloy formation and promote adhesion of the zinccoating with the steel base metal, the molten coating metal compositionnormally contains a percentage of aluminum usually in the range from0.05 to 0.25. This aluminum is purposely supplied to the molten coatingbath, either as a specified ingredient in the zinc spelter or by the additionof a master allot containing aluminum.7. Mechanical Properties7.1 Structural steel, and high-strength low-alloy steel, shallconform to the mechanical property requirements in Table 5 forthe grade, or class, or both. The typical ranges of mechanicalproperties nonmandatory for CS types A, B, and C are shownin Table 6.8. Coating Properties8.1 Coating Weight [Mass]8.1.1 Coating weight [mass] shall conform to the require-ments as shown in Table 1 for the specific coating designation.8.1.2 Use the following relationships to estimate the coatingthickness from the coating weight [mass]TABLE 2 Chemical RequirementsAfor Twin Roll Cast Hot Rolled Steel Sheet Designations CSDesignationComposition, Heat Analysis Element,Maximum unless otherwise shownCMn P SAlB,CSiCCuDNi Cr Mo V Cb Ti NCSType A0.10 0.70 0.030 0.035 . . . . . . 0.25 0.20 0.15 0.06 0.008 0.008 0.008 . . .CSType BE0.02 to0.150.70 0.030 0.035 . . . . . . 0.25 0.20 0.15 0.06 0.008 0.008 0.008 . . .CSType C0.15 0.80 0.030 0.035 . . . . . . 0.50 0.30 0.30 0.15 0.008 0.008 0.008 . . .AWhere an ellipsis . . . appears in this table there is no requirement, but the analysis shall be reported.BWhen aluminum deoxidized steel is required, it may be ordered to a minimum of 0.01 total aluminum.CTwin-roll cast product shall be deoxidized using either silicon or aluminum.DWhen copper steel is specified, the copper limit is a minimum of 0.20 .ESpecify Type B to avoid carbon levels below 0.02 .A1063/A1063M − 11a38.1.2.1 1.00 oz/ft2coating weight 1.68 mils coatingthickness, and8.1.2.2 7.14 g/m2coating mass 1.00 m coating thickness.8.1.3 Use the following relationship to convert coatingweight to coating mass8.1.3.1 1.00 oz/ft2coating weight 305 g/m2coating mass.8.2 Coating Weight [Mass] Tests8.2.1 Coating weight [mass] tests shall be performed inaccordance with the requirements of Specification A924/A924M.8.2.2 The referee method to be used shall be Test MethodA90/A90M.8.3 Coating Bend Test8.3.1 The bend test specimens of coated sheet designated byprefix “G” [“Z”] shall be capable of being bent through 180 inany direction without flaking of the coating on the outside ofthe bend only. The coating bend test inside diameter shall havea relation to the thickness of the specimen as shown in Table 7.Flaking of the coating within 0.25 in. [6 mm] of the edge of thebend specimen shall not be cause for rejection

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