1、Designation: A1046/A1046M 17aStandard Specification forSteel Sheet, Zinc-Aluminum-Magnesium Alloy-Coated by theHot-Dip Process1This standard is issued under the fixed designation A1046/A1046M; the number immediately following the designation indicates theyear of original adoption or, in the case of
2、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 zinc-aluminum-magnesiumalloy-coated steel sheet in coils and cut leng
3、ths.1.2 This product is intended for applications requiringcorrosion resistance and paintability.1.3 The steel sheet is produced in a number of designations,types, grades and classes designed to be compatible withdiffering application requirements.1.4 Product furnished under this specification shall
4、 conformto the applicable requirements of the latest issue of Specifica-tion A924/A924M, unless otherwise provided herein.1.5 The text of this standard references notes and footnoteswhich provide explanatory material. These notes and footnotes,excluding those in tables and figures, shall not be cons
5、idered asrequirements of the standard.1.6 This specification is applicable to orders in eitherinch-pound units (as A1046) or SI units (as A1046M). Valuesin inch-pound and SI units are not necessarily equivalent.Within the text, SI units are shown in brackets. Each systemshall be used independently o
6、f the other.1.7 Unless the order specifies the “M” designation (SIunits), the product shall be furnished to inch-pound units.1.8 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 app
7、ro-priate safety, health, environmental practices and determinethe applicability of regulatory limitations prior to use.1.9 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelop
8、ment of International Standards, Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2A90/A90M Test Method for Weight Mass of Coating onIron and Steel Articles with Zinc or Zinc-Alloy CoatingsA568/A56
9、8M 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 ProcessE
10、517 Test Method for Plastic Strain Ratio r for Sheet MetalE646 Test Method for Tensile Strain-Hardening Exponents(n -Values) of Metallic Sheet Materials3. Terminology3.1 Definitions:See Terminology A902 for definitions of general terminologyrelating to metallic-coated hot-dip products.4. Classificat
11、ion4.1 The material is available in several designations asfollows:4.1.1 Commercial SteelCS Types A, B, and C,4.1.2 Deep Drawing SteelDDS,4.1.3 Extra Deep Drawing SteelEDDS,4.1.4 Forming SteelFS Types A and B,4.1.5 High Strength Low Alloy SteelHSLAS,4.1.6 High Strength Low Alloy Steel with ImprovedF
12、ormabilityHSLAS-F.4.1.7 Structural SteelSS,4.2 Structural steel and high strength low alloy steel areavailable in several grades based on mechanical properties.Structural Steel Grade 50 340 is available in four classesbased on tensile strength.1This specification is under the jurisdiction of ASTM Co
13、mmittee A05 onMetallic-Coated Iron and Steel Products and is the direct responsibility ofSubcommittee A05.11 on Sheet Specifications.Current edition approved Nov. 1, 2017. Published November 2017. Originallyapproved in 2006. Last previous edition approved in 2017 as A1046/A1046M - 17.DOI: 10.1520/A1
14、046_A1046M-17A.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 standards Document Summary page onthe ASTM website.*A Summary of Changes section appears at the e
15、nd 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 theD
16、evelopment of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.14.3 The product is available in several coating weightsmasses with the coating designation in accordance with Table1.5. Ordering Information5.1 Zinc-a
17、luminum-magnesium alloy-coated steel sheet incoils and cut lengths is produced to thickness requirementsexpressed to 0.001 in. 0.01 mm. The thickness of the sheetincludes the base metal and the coating.5.2 Orders for product to this specification shall include thefollowing information, as necessary,
18、 to adequately describe thedesired product:5.2.1 Name of product (steel sheet, zinc-aluminum-magnesium alloy-coated),5.2.2 Designation of sheet steel CS (Type A, B, or C), FS(Type A or B), DDS, EDDS, SS, HSLAS or HSLAS-F,5.2.2.1 When a CS type is not specified, CS Type B will befurnished. When an FS
19、 type is not specified, FS Type B will befurnished.5.2.3 When an SS or HSLAS designation is specified, statethe grade or class, or combination thereof.5.2.4 ASTM designation number and year of issue, such asA1046-_ for inch-pound units or A1046M-_ for SI units,5.2.5 Coating designation,5.2.6 Coating
20、 bath composition type (see section 6.2).5.2.7 Chemically treated or not chemically treated,5.2.8 Oiled or not oiled,5.2.9 Dimensions (show thickness, minimum or nominal,width, flatness requirements (if appropriate), and length (if cutlength).5.2.10 Coil size requirements (specify maximum outsidedia
21、meter (OD), acceptable inside diameter (ID), and maximumweight mass),5.2.11 Packaging,5.2.12 Certification, if required, and heat analysis and me-chanical property report,5.2.13 Application (show part identification anddescription), and5.2.14 Special requirements (if any).5.2.14.1 When the purchaser
22、 requires thickness tolerancesfor38-in. 10-mm minimum edge distance (see Supplemen-tary Requirement in specification A924/A924M), this require-ment shall be specified in the purchase order or contract.NOTE 1Typical ordering descriptions are as follows:Steel sheet, zinc-aluminum-magnesium alloy coate
23、d, Forming Steel TypeB, ASTM A1046-_, coating designation ZM90, chemical treatment, nooil, minimum 0.034 by 48 in. by coil, 60-in. maximum OD, 24-in. ID,10,000-lb maximum, for inner door panel, or steel sheet, zinc-aluminum-magnesium alloy coated, Commercial Steel Type B,ASTM A1046M-_,coating design
24、ation ZMM275, not chemically treated, oiled, minimum0.85 by 900 mm by coil, 1200-mm maximum OD, 610-mm ID, 9,000-kgmaximum, for building panels.6. Chemical Composition6.1 Base Metal:TABLE 1 Weight Mass of Coating RequirementAInch-Pound UnitsCoatingDesignationMinimum RequirementTriple-Spot TestTotal
25、Both Sides, oz/ft2Single-Spot TestTotal Both Sides, oz/ft2ZM20 0.20 0.16ZM30 0.30 0.25ZM40 0.40 0.30ZM50 0.50 0.40ZM60 0.60 0.50ZM70 0.70 0.60ZM75 0.75 0.65ZM90 0.90 0.80ZM100 1.00 0.90ZM115 1.15 1.00ZM140 1.40 1.20ZM165 1.65 1.40ZM210 2.10 1.80SI UnitsCoatingDesignationMinimum RequirementTriple-Spo
26、t TestTotal Both Sides, g/m2Single-Spot TestTotal Both Sides, g/m2ZMM60 60 50ZMM90 90 75ZMM120 120 90ZMM150 150 120ZMM180 180 150ZMM210 210 180ZMM220 220 190ZMM275 275 235ZMM300 300 270ZMM350 350 300ZMM450 450 385ZMM500 500 425ZMM600 600 510AThe coating designation number is the term by which this p
27、roduct is specified. Because of the many variables and changing conditions that are characteristic of continuoushot-dip coating lines, the weight mass of the coating is not always evenly divided between the two surfaces of a sheet, nor is the coating evenly distributed from edgeto edge. However, it
28、can normally be expected that not less than 40 % of the single-spot test limit will be found on either surface.A1046/A1046M 17a26.1.1 The heat analysis of the base metal shall conform tothe requirements shown in Table 2 for CS (Types A, B, and C),FS (Types A and B), DDS and EDDS, and Table 3 for SS,
29、HSLAS and HSLAS-F.6.1.2 Each of the elements listed in Tables 2 and 3 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, titani
30、um 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 Coating Bath CompositionThe bath metal used forzinc-aluminum-magnesium alloycoated sheet sha
31、ll contain0.5 to 13 % aluminum, 0.4 to 4 % magnesium, up to 1 % totaladditional alloying elements (except iron) and the balance zinc.Five types are available, as follows (see Annex A1 for avisual representation):Type 1: 5 to 13 % aluminum, 2 to 4% magnesiumType 2: 3 to less than 5% aluminum, 2 to 4%
32、 magnesiumType 3: 3 to 6% aluminum, 0.4 to less than 2% magnesiumType 4: 0.5 to less than 3% aluminum, 0.4 to less than 2.6 %magnesiumType 5: 0.5 to less than 3% aluminum, 2.6 to 4% magnesium.Due to differences in coating bath chemistry, the propertiesprovided by each type may differ and the user sh
33、all specify thetype suitable for the application accordingly.7. Mechanical Properties7.1 Structural steel and high strength low alloy steel shallconform to the mechanical property requirements of Table 4for the grade or class or combination thereof, specified.7.2 The typical mechanical properties fo
34、r CS (Types A, B,and C), FS (Types A and B), DDS, EDDS steel sheetdesignations are listed in Table 5. These mechanical propertyvalues are non-mandatory. They are intended solely to providethe purchaser with as much information as possible to make aninformed decision on the steel to be specified. Val
35、ues outsidethese ranges are to be expected.7.3 When base metal mechanical properties are required, alltests shall be conducted in accordance with the methodsspecified in Specification A924/A924M.7.4 Bending Properties:7.4.1 Minimum Cold Bending RadiiStructural steel sheetis commonly fabricated by co
36、ld bending. There are manyinterrelated factors that affect the ability of a steel to cold formover a given radius under shop conditions. These factorsinclude: thickness, strength level, degree of restraint, relation-ship to rolling direction, chemistry and base metal microstruc-ture. Appendix X1 lis
37、ts the suggested minimum inside radiusfor 90 cold bending for these steel sheets. They pre-suppose“hard way” bending (bend axis parallel to rolling direction) andreasonably good shop forming practices. Where possible, theuse of larger radii or “easy way” bending is recommended forimproved performanc
38、e.7.4.2 Fabricators should be aware that cracks may initiateupon bending a sheared edge or cold-worked edge. This is notconsidered to be a fault of the steel, but is rather a function ofthe induced localized cold-work zone.8. Coating Properties8.1 Coating Weight Mass:8.1.1 Coating weight mass shall
39、conform to the require-ments as shown in Table 1 for the specific coating designation.8.1.2 Use the relationships in Table 6 to estimate the coatingthickness from the coating weight mass.8.1.3 Use the following relationship to convert coatingweight to coating mass:8.1.3.1 1.00 oz/ft2coating weight =
40、 305 g/m2coating mass.8.2 Coating Weight Mass Tests:8.2.1 Coating weight mass tests shall be performed inaccordance with the requirements stated in Specification A924/A924M.8.2.2 The referee method to be used shall be the dilutehydrochloric acid method, in Test Method A90/A90M8.3 Coating Bend TestTh
41、e coating bend test specimensshall be capable of being bent through 180 in any directionwithout flaking of the coating on the outside of the bend only.TABLE 2 Chemical RequirementsAComposition, %-Heat Analysis Element, max (unless otherwise shown)Designation C Mn P S Al, min Cu Ni Cr Mo V Cb TiBNCS
42、Type AC,D ,E0.10 0.60 0.030 0.035 . 0.20 0.20 0.15 0.06 0.008 0.008 0.025 .CS Type BC,F0.02 to 0.15 0.60 0.030 0.035 . 0.20 0.20 0.15 0.06 0.008 0.008 0.025 .CS Type CC,D ,E0.08 0.60 0.100 0.035 . 0.20 0.20 0.15 0.06 0.008 0.008 0.025 .FS Type AC,G0.10 0.50 0.020 0.035 . 0.20 0.20 0.15 0.06 0.008 0.
43、008 0.025 .FS Type BC,F0.02 to 0.10 0.50 0.020 0.030 . 0.20 0.20 0.15 0.06 0.008 0.008 0.025 .DDSD,E,H0.06 0.50 0.020 0.025 0.01 0.20 0.20 0.15 0.06 0.008 0.008 0.025 .EDDSH,I0.02 0.40 0.020 0.020 0.01 0.20 0.20 0.15 0.06 0.10 0.10 0.15 .AWhere an ellipsis (.) appears in this table, there is no requ
44、irement, but the analysis shall be reported.BFor steels containing more than 0.02 % carbon, titanium is permitted to 0.025 % provided the ratio of % titanium to % nitrogen does not exceed 3.4.CWhen a deoxidized steel is required for the application, the purchaser has the option to order CS and FS to
45、 a minimum of 0.01 % total aluminum.DSteel is permitted to be furnished as a vacuum degassed or chemically stabilized steel, or both, at the producers option.EFor carbon levels less than or equal to 0.02 %, vanadium, columbium, or titanium, or combinations thereof are permitted to be used as stabili
46、zing elementsattheproducers option. In such cases, the applicable limit for vanadium and columbium shall be 0.10 % max. and the limit for titanium shall be 0.15 % max.FFor CS and FS, specify Type B to avoid carbon levels below 0.02 %.GShall not be furnished as a stabilized steel.HMinimum Al content
47、is not required if agreed to by purchaser and supplier.IShall be furnished as a stabilized steel.A1046/A1046M 17a3The coating bend test inside diameter shall have a relation tothe thickness of the specimen as shown in Table 7. Flaking ofthe coating within 0.25 in. 6 mm of the edge of the bendspecime
48、n shall not be cause for rejection.9. Dimensions and Permissible Variations9.1 All dimensions and permissible variations shall complywith the requirements of Specification A924/A924M.10. Keywords10.1 coatings, metallic; steel sheet, metallic coated; zinc-aluminum-magnesium alloy coatingTABLE 3 Chemi
49、cal RequirementsAComposition, %-Heat Analysis Element, max (unless otherwise shown)Designation C Mn P S Cu Ni Cr Mo VBCbBTiB,C ,DNSS Grade33 230 0.20 1.35 0.04 0.040 0.20 0.20 0.15 0.06 0.008 0.008 0.025 .37 255 0.20 1.35 0.10 0.040 0.20 0.20 0.15 0.06 0.008 0.008 0.025 .40 275 0.25 1.35 0.10 0.040 0.20 0.20 0.15 0.06 0.008 0.008 0.025 .50 340 Class 1,2 and 4 0.25 1.35 0.20 0.040 0.20 0.20 0.15 0.06 0.008 0.008 0.025 .50 340 Class 3 0.25 1.35 0.04 0.040 0.20 0.20 0.15
