1、Designation: A 653/A 653M 07Standard Specification forSteel Sheet, Zinc-Coated (Galvanized) or Zinc-Iron Alloy-Coated (Galvannealed) by the Hot-Dip Process1This standard is issued under the fixed designation A 653/A 653M; the number immediately following the designation indicates the yearof original
2、 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 (e) indicates an editorial change since the last revision or reapproval.1. Scope*1.1 This specification covers steel sheet, zinc-coated (gal-vanized)
3、or zinc-iron alloy-coated (galvannealed) by the hot-dip process in coils and cut lengths.1.2 The product is produced in various zinc or zinc-ironalloy-coating weights masses or coating designations asshown in Table 1.1.3 Product furnished under this specification shall conformto the applicable requi
4、rements of the latest issue of Specifica-tion A 924/A 924M, unless otherwise provided herein.1.4 The product is available in a number of designations,grades and classes in four general categories that are designedto be compatible with different application requirements.1.4.1 Steels with mandatory ch
5、emical requirements andtypical mechanical properties.1.4.2 Steels with mandatory chemical requirements andmandatory mechanical properties.1.4.3 Steels with mandatory chemical requirements andmandatory mechanical properties that are achieved throughsolid-solution or bake hardening.1.5 This specificat
6、ion is applicable to orders in eitherinch-pound units (as A 653) or SI units (as A 653M). Values ininch-pound and SI units are not necessarily equivalent. Withinthe text, SI units are shown in brackets. Each system shall beused independently of the other.1.6 Unless the order specifies the “M” design
7、ation (SIunits), the product shall be furnished to inch-pound units.1.7 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.1.8 Th
8、is 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 Documen
9、ts2.1 ASTM Standards:2A 90/A 90M Test Method for Weight Mass of Coating onIron and Steel Articles with Zinc or Zinc-Alloy CoatingsA 370 Test Methods and Definitions for Mechanical Testingof Steel ProductsA 568/A 568M Specification for Steel, Sheet, Carbon,Structural, and High-Strength, Low-Alloy, Ho
10、t-Rolled andCold-Rolled, General Requirements forA 902 Terminology Relating to Metallic Coated Steel Prod-uctsA 924/A 924M Specification for General Requirements forSteel Sheet, Metallic-Coated by the Hot-Dip ProcessD 2092 Guide for Preparation of Zinc-Coated (Galvanized)Steel Surfaces for PaintingE
11、 517 Test Method for Plastic Strain Ratio r for Sheet MetalE 646 Test Method for Tensile Strain-Hardening Exponents(n -Values) of Metallic Sheet Materials2.2 ISO Standard:ISO 3575 Continuous Hot-Dip Zinc-Coated Carbon Steel ofCommercial and Drawing Qualities3ISO 4998 Continuous Hot-Dip Zinc-Coated C
12、arbon Steel ofStructural Quality33. Terminology3.1 DefinitionsSee Terminology A 902 for definitions ofgeneral terminology relating to metallic-coated hot-dip prod-ucts.3.2 Definitions of Terms Specific to This Standard:3.2.1 bake hardenable steel, nsteel sheet in which asignificant increase in yield
13、 strength is realized when moderate1This 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 June 1, 2007. Published July 2007. Originally appro
14、vedin 1994. Last previous edition approved in 2006 as A 653/A 653M - 06a.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 A
15、STM website.3Available from American National Standards Institute (ANSI), 25 W. 43rd St.,4th Floor, New York, NY 10036.1*A Summary of Changes section appears at the end of this standard.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
16、heat treatment, such as that used for paint baking, followsstraining or cold working.3.2.2 differentially coated, ngalvanized steel sheet havinga specified “coating designation” on one surface and a signifi-cantly lighter specified “coating designation” on the othersurface.3.2.2.1 DiscussionThe sing
17、le side relationship of eitherspecified “coating designation” is the same as shown in thenote of Table 1 regarding uniformity of coating.3.2.3 high strength low alloy steel, na specific group ofsheet steels whose strength is achieved through the use ofmicroalloying elements such as columbium (niobiu
18、m), vana-dium, titanium, and molybdenum resulting in improved form-ability and weldability than is obtained from conventionalcarbon-manganese steels.3.2.3.1 DiscussionProducers use one or a combination ofmicroalloying elements to achieve the desired properties. Theproduct is available in two designa
19、tions, HSLAS andHSLAS-F. Both products are strengthened with microalloys,but HSLAS-F is further treated to achieve inclusion control.3.2.4 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 l
20、ess distinct thanthe pattern visible on regular spangle.3.2.4.1 DiscussionThis finish is produced by one of twomethods: either (1) the zinc crystal growth has been started butTABLE 1 Weight Mass of Coating RequirementsA,B,CNOTE 1 Use the information provided in 8.1.2 to obtain the approximate coatin
21、g thickness from the coating weight mass.Minimum RequirementDTriple-Spot Test Single-Spot TestInch-Pound UnitsType Coating Designation Total Both Sides, oz/ft2One Side Total Both Sides, oz/ft2Zinc G360 3.60 1.28 3.20G300 3.00 1.04 2.60G235 2.35 0.80 2.00G210 2.10 0.72 1.80G185 1.85 0.64 1.60G165 1.6
22、5 0.56 1.40G140 1.40 0.48 1.20G115 1.15 0.40 1.00G100 1.00 0.36 0.90G90 0.90 0.32 0.80G60 0.60 0.20 0.50G40 0.40 0.12 0.30G30 0.30 0.10 0.25G01 no minimum no minimum no minimumZinc-iron alloy A60 0.60 0.20 0.50A40 0.40 0.12 0.30A25 0.25 0.08 0.20A01 no minimum no minimum no minimumSI UnitsType Coati
23、ng Designation Total Both Sides, g/m2One Side Total Both Sides, g/m2Zinc Z1100 1100 390 975Z900 900 316 790Z700 700 238 595Z600 600 204 510Z550 550 190 475Z500 500 170 425Z450 450 154 385Z350 350 120 300Z305 305 110 275Z275 275 94 235Z180 180 60 150Z120 120 36 90Z90 90 30 75Z001 no minimum no minimu
24、m no minimumZinc-iron alloy ZF180 180 60 150ZF120 120 36 90ZF75 75 24 60ZF001 no minimum no minimum no minimumAThe coating designation number is the term by which this product is specified. Because of the many variables and changing conditions that are characteristic ofcontinuous hot-dip coating lin
25、es, the zinc or zinc-iron alloy coating is not always evenly divided between the two surfaces of a coated sheet; nor is it always evenlydistributed 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 require
26、ment.BAs it is an established fact that the atmospheric corrosion resistance of zinc or zinc-iron alloy-coated sheet products is a direct function of coating thickness (weight(mass), the selection of thinner (lighter) coating designations will result in almost linearly reduced corrosion performance
27、of the coating. For example, heavier galvanizedcoatings perform adequately in bold atmospheric exposure whereas the lighter coatings are often further coated with paint or a similar barrier coating for increasedcorrosion resistance. Because of this relationship, products carrying the statement “meet
28、s ASTM A 653/A 653M requirements” should also specify the particular coatingdesignation.CInternational Standard, ISO 3575, continuous hot-dip zinc-coated carbon steel sheet contains Z100 and Z200 designations and does not specify a ZF75 coating.DNo minimum means that there are no established minimum
29、 requirements for triple- and single-spot tests.A 653/A 653M 072arrested 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 normall
30、yproduced in coating designations G90 Z275 and lighter.3.2.5 regular spangle, nthe finish produced on hot-dipzinc-coated steel sheet in which there is a visible multifacetedzinc crystal structure.3.2.5.1 DiscussionSolidification of the zinc coating istypically uncontrolled, which produces the variab
31、le grain sizeassociated with this finish.3.2.6 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 spangle forma-tion, is not visible to the unaided eye.3.2.6.1 DiscussionThis finish is pro
32、duced when the zinccrystal growth is inhibited by a combination of coating-bathchemistry, or cooling, or both during solidification of the zinc.3.2.7 solid-solution hardened steel or solution hardenedsteel, nsteel sheet strengthened through additions of substi-tutional alloying elements such as Mn,
33、P, or Si.3.2.7.1 DiscussionSubstitutional alloying elements suchas Mn, P, and Si can occupy the same sites as iron atoms withinthe crystalline structure of steels. Strengthening arises as aresult of the mismatch between the atomic sizes of theseelements and that of iron.3.2.8 zinc-iron alloy, na dul
34、l grey coating with no spanglepattern that is produced on hot-dip zinc-coated steel sheet.3.2.8.1 DiscussionZinc-iron alloy coating is composedentirely of inter-metallic alloys. It is typically produced bysubjecting the hot-dip zinc-coated steel sheet to a thermaltreatment after it emerges from the
35、molten zinc bath. This typeof coating is suitable for immediate painting without furthertreatment except normal cleaning (refer to Guide D 2092). Thelack of ductility of the alloy coating presents a potential forpowdering, etc.4. Classification4.1 The material is available in several designations as
36、follows:4.1.1 Commercial steel (CS Types A, B, and C),4.1.2 Forming steel (FS Types A and B),4.1.3 Deep drawing steel (DDS Types A and C),4.1.4 Extra deep drawing steel (EDDS),4.1.5 Structural steel (SS),4.1.6 High strength low alloy steel (HSLAS),4.1.7 High strength low alloy steel with improved fo
37、rmabil-ity (HSLAS-F),4.1.8 Solution hardened steel (SHS), and4.1.9 Bake hardenable steel (BHS).4.2 Structural steel, high strength low alloy steel, solutionhardened steel, and bake hardenable steel are available inseveral grades based on mechanical properties. Structural SteelGrade 50 340 is availab
38、le in four classes based on tensilestrength. Structural Steel Grade 80 550 is available in twoclasses, based on chemistry.4.3 The material is available as either zinc-coated or zinc-iron alloy-coated in several coating weights masses orcoating designations as shown in Table 1, and4.3.1 The material
39、is available with the same or differentcoating designations on each surface.5. Ordering Information5.1 Zinc-coated or zinc-iron alloy-coated sheet in coils andcut lengths is produced to thickness requirements expressed to0.001 in. 0.01 mm. The thickness of the sheet includes boththe base metal and t
40、he coating.5.2 Orders for product to this specification shall include thefollowing information, as necessary, to adequately describe thedesired product:5.2.1 Name of product (steel sheet, zinc-coated (galvanized)or zinc-iron alloy-coated (galvannealed),5.2.2 Designation of sheet CS (Types A, B, and
41、C), FS(Types A and B), DDS (Types A and C), EDDS, SS, HSLAS,HSLAS-F, SHS, or BHS.5.2.2.1 When a CS type is not specified, CS Type B will befurnished. When a FS type is not specified, FS Type B will befurnished. When a DDS type is not specified, DDS Type A willbe furnished.5.2.3 When a SS, HSLAS, HSL
42、AS-F, SHS, or BHS desig-nation is specified, state the grade, or class, or combinationthereof.5.2.4 ASTM designation number and year of issue, asA 653for inch-pound units or A 653M for SI units.5.2.5 Coating designation,5.2.6 Chemically treated or not chemically treated,5.2.7 Oiled or not oiled,5.2.
43、8 Minimized spangle (if required),5.2.9 Extra smooth (if required),5.2.10 Phosphatized (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 Specificati
44、on A 924/A 924M that applies to theorder, that is, the table of thickness tolerances for38-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
45、 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).5.2.16.1 If required, the product may be ordered to aspecified base metal thickness (see Suppleme
46、ntary Require-ment S1.)NOTE 1Typical ordering descriptions are as follows: steel sheet,zinc-coated, commercial steel TypeA,ASTMA 653, Coating DesignationG 115, chemically treated, oiled, minimum 0.040 by 34 by 117 in., forstock tanks, or steel sheet, zinc-coated, high strength low alloy steel Grade3
47、40, ASTM A 653M, Coating Designation Z275, minimized spangle, notchemically treated, oiled, minimum 1.00 by 920 mm by coil, 1520-mmmaximum OD, 600-mm ID, 10 000-kg maximum, for tractor inner fender.A 653/A 653M 073NOTE 2The purchaser should be aware that there are variations inmanufacturing practice
48、s among the producers and therefore is advised toestablish the producers standard (or default) procedures for thicknesstolerances.6. Chemical Composition6.1 Base Metal:6.1.1 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 a
49、nd B), DDS (Types A and C), and EDDS, andTable 3 for SS, HSLAS, HSLAS-F, SHS, and BHS.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, titanium, or columbiumis less than 0.008 %, report the analysis as either 0.008 % orthe actual determined value. When the amount of boron is lessthan 0.0005 %, report as 0.0005 %
