1、Designation:A1030/A1030M16Standard Practice forMeasuring Flatness Characteristics of Steel Sheet Products1This standard is issued under the fixed designation A1030/A1030M;the number immediately following the designation indicates theyear of original adoption or,in the case of revision,the year of la
2、st 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 Flatness is a significant quality characteristic of steelsheet products.Sheet flatness is affected by mill process factorspl
3、us the grade,thickness and width of the material supplied.Itis the purpose of this practice to define the different flatnesscharacteristics and to describe the method(s)most commonlyused to measure particular characteristics.The methods de-scribed are designed and intended to be used in mill situati
4、onsand environments.1.2 The sheet shall conform to all the requirements of theappropriate specifications as follows:Specifications A568/A568M or A924/A924M.1.3 Quantitative limits are not addressed and are establishedinthegeneralrequirements,orindividualproductspecifications,or both;or when applicab
5、le,as agreed tobetween supplier and user.1.4 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard.The values stated ineach system may not be exact equivalents;therefore,eachsystem shall be used independently of the other.Combiningvalues from the two syste
6、ms may result in non-conformancewith the standard.1.5 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 regu
7、latory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2A568/A568M Specification for Steel,Sheet,Carbon,Structural,and High-Strength,Low-Alloy,Hot-Rolled andCold-Rolled,General Requirements forA924/A924M Specification for General Requirements forSteel Sheet,Metallic-Coated by the H
8、ot-Dip Process3.Significance and Use3.1 The definitions and procedures for measuring flatnesscharacteristics of steel sheet products are provided so thatpurchasers and suppliers have common definitions and mea-suring procedures for flatness characteristics.The intention ofthese definitions and measu
9、ring methods is not to provide adimensional specification for flatness characteristics,but rathercommon procedure(s)for quantifying flatness anomalies.Fordetermining compliance with flatness specifications,referencesare provided to appropriate ASTM standards.4.Interferences4.1 Measurement of flatnes
10、s often has been subjective,atbest.Successful measurement of various flatness anomalies onquantitative terms requires recognition of several factors thatcan interfere with accurate measurements.4.1.1 Flat surfaces are required.Measurement of severalanomalies requires laying of a cut sheet sample,or
11、a sheet areastill attached to a coil,on a recognized flat surface.In mostcases,laying of a cut sheet sample,or a sheet area still attachedto a coil,on a floor will produce satisfactory results,as long asthe floor is recognized as being flat.The flatness of sheet areasstill attached to a coil is also
12、 measured on the flat tables of coilprocessing lines,with the sheet line tension released.If themeasuring surface is not recognized as being flat,a machinedflat surface is recommended.4.1.2 Stepblock gauges or tapered gauges should bechecked regularly with a calibrated hand micrometer.Wear ordirt bu
13、ild up will affect accuracy.4.1.3 The flat tables of shape gauges capable of measuringflatness characteristics must be clean and the sensors must bein good condition.4.1.4 The sheet sample must be damage free.5.Apparatus5.1 Appropriate tools to measure flatness anomalies aredescribed along with draw
14、ings as indicated.5.1.1 Flat SurfacesAccurate measurements of flatnessanomalies require a flat surface,machined flat preferred.5.1.2 Machined Stepblock GaugeSee Fig.1.Typicallysteps are in116in.1 mm increments.1This practice is under the jurisdiction of ASTM Committee A05 on Metallic-Coated Iron and
15、 Steel Products and is the direct responsibility of SubcommitteeA05.07 on Methods of Testing.Current edition approved May 1,2016.Published May 2016.Originallyapproved in 2003.Last previous edition approved in 2011 as A1030/A1030M-11.DOI:10.1520/A1030_A1030M-16.2For referenced ASTM standards,visit th
16、e 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 end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 5.1.3 Tapered GaugeSee Fig.2.5.1.4 Standard Ruler or Tape Measure.5.1.5 Hand Micrometer.5.1.6 Lightweight StraightedgeRigid,but li
