ASTM A653 A653M-2008 Standard Specification for Steel Sheet Zinc-Coated (Galvanized) or Zinc-Iron Alloy-Coated (Galvannealed) by the Hot-Dip Process.pdf

1、Designation: A 653/A 653M 08Standard 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 () indicates an editorial change since the last revision or reapproval.1. Scope*1.1 This specification covers steel sheet, zinc-coated (gal-vanized) o

3、r 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 1and in Table S2.1.1.3 Product furnished under this specification shall conformto the

4、applicable requirements 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 w

5、ith mandatory chemical 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

6、 This specification 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 specifie

7、s the “M” designation (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 spec

8、ification.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 appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2. Re

9、ferenced Documents2.1 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-Strengt

10、h, Low-Alloy, Hot-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 Surfac

11、es for Painting3E 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:4ISO 3575 Continuous Hot-Dip Zinc-Coated Carbon Steel ofCommercial and Drawing QualitiesISO 4998 Continuous Hot-

12、Dip Zinc-Coated Carbon Steel ofStructural Quality3. 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 i

13、ncrease in yield strength is realized when moderateheat treatment, such as that used for paint baking, followsstraining or cold working.1This specification is under the jurisdiction of ASTM Committee A05 onMetallic-Coated Iron and Steel Products and is the direct responsibility ofSubcommittee A05.11

14、 on Sheet Specifications.Current edition approved July 15, 2008. Published August 2008. Originallyapproved in 1994. Last previous edition approved in 2007 as A 653/A 653M - 07.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. Fo

15、r Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Withdrawn.4Available from American National Standards Institute (ANSI), 25 W. 43rd St.,4th Floor, New York, NY 10036, http:/www.ansi.org.1*A Summary of Changes section appears at the e

16、nd of this standard.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.3.2.2 differentially coated, ngalvanized steel sheet havinga specified “coating designation” on one surface and a signifi-cantly lighter specified “coating designatio

17、n” on the othersurface.3.2.2.1 DiscussionThe single side relationship of eitherspecified “coating designation” is the same as shown in thenote of Table 1 regarding uniformity of coating.3.2.3 high strength low alloy steel, na specific group ofsheet steels whose strength is achieved through the use o

18、fmicroalloying elements such as columbium (niobium), 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 p

19、roperties. Theproduct is available in two designations, 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

20、tothe unaided eye, and is typically smaller and less distinct thanthe pattern visible on regular spangle.TABLE 1 Weight Mass of Coating RequirementsA,B,CNOTE 1 Use the information provided in 8.1.3 to obtain the approximate coating thickness from the coating weight mass.Minimum RequirementDTriple-Sp

21、ot Test Single-Spot TestInch-Pound UnitsType Coating Designation Total Both Sides, oz/ft2One Side, oz/ft2Total Both Sides, oz/ft2Zinc G01 no 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 1.20G

22、165 1.65 0.56 1.40G185 1.85 0.64 1.60G210 2.10 0.72 1.80G235 2.35 0.80 2.00G300 3.00 1.04 2.60G360 3.60 1.28 3.20Zinc-iron alloy A01 no minimum no minimum no minimumA25 0.25 0.08 0.20A40 0.40 0.12 0.30A60 0.60 0.20 0.50SI UnitsType Coating Designation Total Both Sides, g/m2One Side, g/m2Total Both S

23、ides, g/m2Zinc Z001 no 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 510Z700 700 238 595Z900 900 316 790Z1100 1100 390 975Zinc-iron alloy ZF001 no minimum no minimum no

24、 minimumZF75 75 24 60ZF120 120 36 90ZF180 180 60 150AThe coating designation is the term by which the minimum triple spot, total both sides coating weight mass is specified. Because of the many variables and changingconditions that are characteristic of continuous hot-dip coating lines, the zinc or

25、zinc-iron alloy coating is not always evenly divided between the two surfaces of a coatedsheet; 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

26、 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 of the coating. F

27、or 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 “meets ASTM A 653/A 65

28、3M 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 requirements for

29、 triple- and single-spot tests.A 653/A 653M 0823.2.4.1 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

30、 of coating-bath chemistry plus cooling duringsolidification of the zinc. Minimized spangle is normallyproduced 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.

31、2.5.1 DiscussionSolidification of the zinc coating istypically uncontrolled, which produces the variable 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

32、 created by spangle forma-tion, is not visible to the unaided eye.3.2.6.1 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.3.2.7 solid-solution hardened steel or solution harden

33、edsteel, nsteel sheet strengthened through additions of substi-tutional alloying elements such as Mn, 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

34、 the mismatch between the atomic sizes of theseelements and that of iron.3.2.8 zinc-iron alloy, na dull 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 prod

35、uced bysubjecting the hot-dip zinc-coated steel sheet to a thermaltreatment after it emerges from the 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

36、 potential forpowdering, etc.4. Classification4.1 The material is available in several designations asfollows: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

37、 (SS),4.1.6 High strength low alloy steel (HSLAS),4.1.7 High strength low alloy steel with improved formabil-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

38、are available inseveral grades based on mechanical properties. Structural SteelGrade 50 340 is available 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-coate

39、d in several coating weights masses orcoating designations as shown in Table 1 and in Table S2.1, and4.3.1 The material 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 produc

40、ed to thickness requirements expressed to0.001 in. 0.01 mm. The thickness of the sheet includes boththe base metal and the 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

41、 sheet, zinc-coated (galvanized)or zinc-iron alloy-coated (galvannealed),5.2.2 Designation of sheet CS (Types A, B, and 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 specifie

42、d, FS Type B will befurnished. When a DDS type is not specified, DDS Type A willbe furnished.5.2.3 When a SS, HSLAS, HSLAS-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

43、 for SI units.5.2.5 Coating designation,5.2.6 Chemically treated or not chemically treated,5.2.7 Oiled or not oiled,5.2.8 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 requireme

44、nts, and length, if cut lengths). Thepurchaser shall specify the appropriate table of thicknesstolerances in Specification 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

45、.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

46、 requirements (if any).5.2.16.1 If required, the product may be ordered to aspecified base metal thickness (see Supplementary Require-ment S1.)5.2.16.2 If required, the product may be ordered to aspecified single spot/single side coating mass (see Supplemen-tary Requirement S2.)NOTE 1Typical orderin

47、g 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 GradeA 653/A 653M 083340, ASTM A 653M, Coating Des

48、ignation 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.NOTE 2The purchaser should be aware that there are variations inmanufacturing practices among the producers and therefore is advis

49、ed 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 and 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 analy