ASTM A987 A987M-2009(2014) Standard Practice for Measuring Shape Characteristics of Tin Mill Products《镀锡薄钢板轧制产品形状特性测量的标准试验方法》.pdf
《ASTM A987 A987M-2009(2014) Standard Practice for Measuring Shape Characteristics of Tin Mill Products《镀锡薄钢板轧制产品形状特性测量的标准试验方法》.pdf》由会员分享,可在线阅读,更多相关《ASTM A987 A987M-2009(2014) Standard Practice for Measuring Shape Characteristics of Tin Mill Products《镀锡薄钢板轧制产品形状特性测量的标准试验方法》.pdf(8页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: A987/A987M 09 (Reapproved 2014)Standard Practice forMeasuring Shape Characteristics of Tin Mill Products1This standard is issued under the fixed designation A987/A987M; the number immediately following the designation indicates the yearof original adoption or, in the case of revision, t
2、he 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 Shape is a significant quality characteristic for tin millproducts. Plate-shape is affected by mill proces
3、s factors plusthe temper, thickness and width of the material supplied. It isthe purpose of this practice to define accurately the differentplate shape characteristics and to describe the practice(s) mostcommonly used to measure particular characteristics.1.2 Quantitative limits are not addressed an
4、d should beestablished on an individual producer and user basis, whereappropriate.1.3 The values stated in either in-pound or SI units are to beregarded as standard. Within the text, the SI units are shown inbrackets. The values stated in each system must be usedindependently of the other. Combining
5、 values from the twosystems may result in nonconformance with this specification.1.4 This standard does not purport to address the safetyconcerns, if any, associated with its use. It is the responsibilityof the user of this standard to establish appropriate safety andhealth practices and to determin
6、e the applicability of regula-tory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2A599/A599M Specification for Tin Mill Products, Electro-lytic Tin-Coated, Cold-Rolled SheetA623 Specification for Tin Mill Products, General Require-mentsA623M Specification for Tin Mill Products,
7、General Re-quirements MetricA624/A624M Specification for Tin Mill Products, Electro-lytic Tin Plate, Single ReducedA625/A625M Specification for Tin Mill Products, BlackPlate, Single-ReducedA626/A626M Specification for Tin Mill Products, Electro-lytic Tin Plate, Double ReducedA650/A650M Specification
8、 for Tin Mill Products, BlackPlate, Double ReducedA657/A657M Specification for Tin Mill Products, BlackPlate Electrolytic Chromium-Coated, Single and DoubleReduced3. Classification3.1 The substrate shall conform to all the requirements ofthe appropriate specifications as follows: Specifications A623
9、,A623M, A599/A599M, A624/A624M, A625/A625M, A626/A626M, A650/A650M, and A657/A657M.4. Significance and Use4.1 The definitions and procedures for measuring shapecharacteristics of tin mill products are provided so that pur-chasers and suppliers have common measuring procedures anddefinitions of shape
10、 characteristics. These procedures providedefinitions and measuring techniques of shape characteristics.The intention of these definitions and measuring practices isnot to provide a dimensional specification for shapecharacteristics, but rather common procedure(s) for quantify-ing shape anomalies.5.
11、 Interferences5.1 Measurement of shape often has been subjective, at best.Successful measurement of various shape anomalies on quan-titative terms requires recognition of several factors that caninterfere with accurate measurements.5.1.1 Flat surfaces are required. Measurement of severalanomalies re
12、quire laying of the sample on a flat surface. Amachined flat surface is recommended. Laying a sample on afloor may introduce error due to areas on a floor that are notflat.5.1.2 Several anomalies are measured by hanging the sheet.Hanging by holding the sample with a hand can introduce errorfrom pres
13、sures exerted by fingers. A mechanical single deviceclamp to help hold these samples is recommended.5.1.3 Stepblock gauges or tapered gauges should bechecked regularly with a calibrated hand micrometer. Wear ordirt build up could affect accuracy.1This practice is under the jurisdiction of ASTM Commi
14、ttee A01 on Steel,Stainless Steel and Related Alloys and is the direct responsibility of SubcommitteeA01.20 on Tin Mill Products.Current edition approved Oct. 1, 2014. Published November 2014. Originallyapproved in 1998. Last previous edition approved in 2009 as A987 - 09. DOI:10.1520/A0987_A0987M-0
15、9R14.2For 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 end of this
16、 standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States15.1.4 Computer-based shape measuring instruments must beclean and the sensors must be in good condition. The sheetsample must be damage free.6. Apparatus6.1 Appropriate tools to
17、 measure shape anomalies are de-scribed along with drawings (attached) as required.6.1.1 Flat Surfaces Accurate measurements of shapeanomalies require a flat surface, machined flat preferred.6.1.2 Machined Stepblock GaugeSee Fig. 1, typically,steps are in116-in. increments.6.1.3 Tapered Gauge See Fi
18、g. 2.6.1.4 Standard Ruler or Tape Measure.6.1.5 Hand Micrometer.6.1.6 Shape Test JigFig. 3, or other shape test jigs ofappropriate design.6.1.7 Light-Weight Straight-Edge.6.1.8 Computer-based Shape Measuring Instruments aredesigned for flatness measurements on samples of cold rolledsheet products or
19、 tin mill products.7. ProcedureDefinitions and Measuring Practices of Shape Anomalies7.1 Wavy Edge (See Fig. 4):7.1.1 DefinitionA series of rolling direction edge devia-tions from a recognized flat surface. When a sample is placedon a recognized flat table, wavy edges will appear as undula-tions alo
20、ng the edge, having the height (A) and a measurablecycle (B). This defect can be quantified using the “I” unit (seeSection 8) or steepness calculations.7.1.2 Measuring Practices:7.1.2.1 A sample of approximately 3 ft 0.9 m in length bycoil width is placed on a flat table. Measure the height (A)atthe
21、 peak point of each wave from the recognized flat surfacewith a tapered gauge or a stepblock gauge. Also measure thecycle length (B) from peak to peak of each wave with a ruleror tape measure.7.1.2.2 Measure using a computer-based shape measuringinstrument or other instrument of appropriate design.7
22、.2 Ridge Buckle, Quarter Buckle, Center Buckle (see Fig.5):7.2.1 DefinitionThese buckles are continuous deviationsfrom a recognized flat surface occurring usually in narrowwidth areas parallel to the rolling direction other than at thesheet edges.7.2.2 Measuring Practices:7.2.2.1 A sheet sample of a
23、pproximately 3 ft 0.9 m by coilwidth is placed on a flat table. Push material diagonally alongthe sample to within 4 in. 10 cm of the selected corner andmeasure the vertical uplift using a tapered gauge or a stepblockgauge.7.2.2.2 Shear through the center line of the shape anomalyand measure as an e
24、dge wave using a tapered gauge or astepblock gauge.7.2.2.3 Measure using a computer-based shape measuringinstrument or other instrument of appropriate design.7.3 Full Center (see Fig. 6):7.3.1 DefinitionAny overall deviation of a sheet from arecognized flat surface occurring over a major portion of
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