ASTM A917-2006a Standard Specification for Steel Sheet Coated by the Electrolytic Process for Applications Requiring Designation of the Coating Mass on Each Surface (General Requir.pdf
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1、Designation: A 917 06aStandard Specification forSteel Sheet, Coated by the Electrolytic Process forApplications Requiring Designation of the Coating Mass onEach Surface (General Requirements)1This standard is issued under the fixed designation A 917; the number immediately following the designation
2、indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope*1.1 This specification covers hot-rolled
3、 and cold-rolled steelsheet coated by the electrolytic process. Coatings can becomprised of pure metals or metal alloys. For specific coatings,refer to Specifications A 879/A 879M and A 918.1.2 The product shall be coated on one or both surfaces withequal or differential coating masses on the two su
4、rfaces.Sheet-coated with equal coating masses on each surface hassimilar levels of corrosion protection on each surface. Often,however, a higher level of corrosion protection is required onone surface than is required on the other. In these situations,one surface shall be specified with a heavier co
5、ating mass thanthe other. Either surface, when specified to be painted, willprovide additional corrosion protection as compared to anunpainted surface.1.3 This coating process has essentially no effect on the basemetal mechanical properties, and use is permitted on any gradeof hot-rolled or cold-rol
6、led steel sheet. The coated sheet isavailable as Commercial Steel (CS), Drawing Steel (DS), DeepDrawing Steel (DDS), Extra-Deep Drawing Steel (EDDS),Structural Steel (SS) High-Strength Low-Alloy Steel(HSLAS), High-Strength Low-Alloy Steel with ImprovedFormability (HSLAS-F), Solution-Hardened Steel (
7、SHS), orBake-Hardenable Steel (BHS).1.4 The values stated in SI units are to be regarded as thestandard.2. Referenced 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 Mechan
8、ical Testingof Steel ProductsA 754/A 754M Test Method for Coating Weight (Mass) ofMetallic Coatings on Steel by X-Ray FluorescenceA 879/A 879M Specification for Steel Sheet, Zinc Coatedby the Electrolytic Process for Applications RequiringDesignation of the Coating Mass on Each SurfaceA 902 Terminol
9、ogy Relating to Metallic Coated Steel Prod-uctsA 918 Specification for Steel Sheet, Zinc-Nickel AlloyCoated by the Electrolytic Process for Applications Re-quiring Designation of the Coating Mass on Each SurfaceA 1008/A 1008M Specification for Steel, Sheet, Cold-Rolled, Carbon, Structural, High-Stre
10、ngth Low-Alloy,High-Strength Low-Alloy with Improved Formability, So-lution Hardened, and Bake HardenableA 1011/A 1011M Specification for Steel, Sheet and Strip,Hot-Rolled, Carbon, Structural, High-Strength Low-Alloy,High-Strength Low-Alloy with Improved Formability, andUltra-High StrengthB 504 Test
11、 Method for Measurement of Thickness of Me-tallic Coatings by the Coulometric Method1This 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 No
12、v. 1, 2006. Published December 2006. Originallyapproved in 1993. Last previous edition approved in 2006 as A 917 - 06.2For 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 t
13、o the standards Document Summary page onthe ASTM website.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.3. Terminology3.1 DefinitionsFor definitions of terms and abbr
14、eviationsused in this specification, see Terminology A 902.4. Ordering Information4.1 Ordering information for all products is shown in theindividual product specifications.5. Coating Designation (Mass and Type)5.1 The following seven-character format shall be used toidentify the coating mass requir
15、ed:5.1.1 First and Second CharactersMinimum coatingmass of the surface with the less critical surface qualityrequirements;5.1.2 Third CharacterA letter, as designated in the appro-priate product specification, to denote the kind of coating; Gfor pure zinc and N for zinc-nickel alloy;5.1.3 Fourth and
16、 Fifth CharactersMinimum coatingmass of the surface with the more critical surface qualityrequirements;5.1.4 Sixth CharacterA letter, as designated in the appro-priate product specification, to denote the kind of coating; Gfor pure zinc and N for zinc-nickel alloy;5.1.5 Seventh CharacterEither E or
17、U, designating anexposed or unexposed application, respectively.Example: 60 G 20 G ESee Section: 5.1.1 5.1.2 5.1.3 5.1.4 5.1.5NOTE 1The terms “exposed” and “unexposed” describe the intendedapplication as either hidden or exposed to view and is an indicator of thedegree of freedom from surface imperf
18、ections that affect the cosmeticcharacteristics of the coated surface.6. Chemical Requirements6.1 The heat analysis of the steel shall conform to therequirements of the specification for the steel ordered or asspecified by negotiations.7. Base Metal Requirements7.1 The steel shall conform to all of
19、the requirements of theappropriate specification listed as follows for the steel ordered.Where reference is made to a combined standard (such asSpecification A 1011/A 1011M), conformance shall be to themetric portion, using SI units of measurement as standard.7.1.1 Hot Rolled:7.1.1.1 Commercial Stee
20、l (CS), Drawing Steel (DS), Struc-tural Steel (SS), High-Strength Low-Alloy Steel (HSLAS), andHigh-Strength Low-Alloy Steel with Improved Formability(HSLAS-F)Specification A 1011/A 1011M.7.1.2 Cold Rolled:7.1.2.1 Commercial Steel (CS), Drawing Steel (DS), DeepDrawing Steel (DDS), Extra-Deep Drawing
21、Steel (EDDS),Structural Steel (SS), High-Strength Low-Alloy Steel (HSLAS),High-Strength Low-Alloy Steel with Improved Formability(HSLAS-F), Solution-Hardened Steel (SHS), and Bake-Hardenable Steel (BHS)Specification A 1008/A 1008M.7.2 Base Metal Specimens:7.2.1 Test specimens shall be prepared from
22、finished mate-rial and tested in accordance with Test Methods and DefinitionsA 370.7.2.2 In determining the base metal mechanical properties,base metal thickness shall be measured after stripping thecoating from the ends of the specimen contacting the grips ofthe tension testing machine before testi
23、ng.7.2.3 When the percent elongation in the tension test is lessthan the specified minimum and any part of the fracture isoutside the middle half of the gage length as scribed before thetest, the test shall be discarded and a retest shall be permitted.7.3 Retests for Base Metal Mechanical Properties
24、If onetest fails for base metal mechanical requirements, retestingshall conform to the provisions of the applicable base metalspecification.8. Coating Mass Requirements8.1 Coating Mass:8.1.1 Coating mass shall conform to the requirements pre-scribed in the individual coating specification.8.1.2 The
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