1、Designation: A1073/A1073M 16A1073/A1073M 17Standard Practice forUsing Hand Micrometers to Measure the Thickness ofUncoated Steel Sheet and Nonmetallic and Metallic-CoatedSteel Sheet1This standard is issued under the fixed designation A1073/A1073M; the number immediately following the designation ind
2、icates theyear of original adoption or, in the case of revision, the year of last 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 Scope*1.1 This practice defines procedures f
3、or measuring the thickness of uncoated steel sheet and nonmetallic and metallic-coatedsteel sheet.Thickness is a significant quality characteristic of steel sheet products.The ability to accurately measure thickness usinghand micrometers is critical in determining product conformance to specificatio
4、ns. The methods described are designed andintended for use in both laboratory and plant situations and their environments.1.2 The flat steel product shall conform to all the requirements of the appropriate specifications as follows: SpecificationsA924/A924MA109/A109M, A505, A568/A568M, A635/A635M, A
5、684/A684M, and A917A924/A924M.1.3 Quantitative limits are not addressed and are established in the general requirements, or individual product specifications,or both; or when applicable, as agreed to between supplier and user.1.4 This specification is applicable to orders in either inch-pound units
6、or SI units. Values in inch-pound and SI units are notnecessarily equivalent. Within the text, SI units are shown in brackets. Each system shall be used independently of the other.1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the res
7、ponsibilityof the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatorylimitations prior to use.1.6 This international standard was developed in accordance with internationally recognized principles on standardizationestablished in t
8、he Decision on Principles for the Development of International Standards, Guides and Recommendations issuedby the World Trade Organization Technical Barriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2A109/A109M Specification for Steel, Strip, Carbon (0.25 Maximum Percent),
9、Cold-RolledA505 Specification for Steel, Sheet and Strip, Alloy, Hot-Rolled and Cold-Rolled, General Requirements forA568/A568M Specification for Steel, Sheet, Carbon, Structural, and High-Strength, Low-Alloy, Hot-Rolled and Cold-Rolled,General Requirements forA635/A635M Specification for Steel, She
10、et and Strip, Heavy-Thickness Coils, Hot-Rolled, Alloy, Carbon, Structural,High-Strength Low-Alloy, and High-Strength Low-Alloy with Improved Formability, General Requirements forA684/A684M Specification for Steel, Strip, High-Carbon, Cold-RolledA902 Terminology Relating to Metallic Coated Steel Pro
11、ductsA917 Specification for Steel Sheet, Coated by the Electrolytic Process for Applications Requiring Designation of the CoatingMass on Each Surface (General Requirements)A924/A924M Specification for General Requirements for Steel Sheet, Metallic-Coated by the Hot-Dip Process3. Terminology3.1 Defin
12、itionsSee Terminology A902 for definitions of general terminology relating to metallic-coated hot-dip products.1 This practice is under the jurisdiction of ASTM Committee A05 on Metallic-Coated Iron and Steel Products and is the direct responsibility of Subcommittee A05.07on Methods of Testing.Curre
13、nt edition approved May 1, 2016May 1, 2017. Published May 2016May 2017. Originally approved in 2012. Last previous edition approved in 20142016 asA1073/A1073M-14. DOI:10.1520/A1073_A1073M-16.-16. DOI:10.1520/A1073_A1073M-17.2 For referencedASTM standards, visit theASTM website, www.astm.org, or cont
14、actASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have bee
15、n made to the previous version. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current versionof the standard as published by ASTM is to be considered the official document
16、.*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 States13.2 The definitions and procedures for measuring thickness characteristics of steel sheet products are provided so that
17、purchasersand suppliers have common definitions and measuring procedures for thickness measurements. The intention of these definitionsand measuring methods is not to provide dimensional specifications for thickness characteristics, but rather common proceduresfor quantifying thickness values. For d
18、etermining compliance with thickness specifications, references are provided to appropriateASTM standards.4. Apparatus4.1 Micrometers used for thickness measurement shall be constructed with anvils and spindles having minimum diameters of0.188 in. 4.80 mm. The tip of the anvil shall be flat or round
19、ed with a minimum radius of curvature of 0.10 in. 2.55 mm andthe tip of the spindle shall be flat. Micrometers with conical tips, rounded anvil with rounded spindle, pointed tips or any surfacethat may penetrate the surface of the item being measured shall not be used for thickness measurements of s
20、heet steels.Micrometers can be electronic digital, mechanical digital, or analog with vernier scale, as shown in Fig. 1(a), (b), and (c).4.2 Unlock the micrometer and if electronic digital, turn it on.4.3 Typical ways to hold/secure the micrometer are:4.3.1 Grasp the micrometer as shown in Fig. 2, w
21、ith the small finger placed in the frame of the micrometer for support. Thisallows the other hand to insert the sample for measuring after cleaning (see 4.4).4.3.2 Support the micrometer with a micrometer mount. This allows the other hand to insert the sample after cleaning (see 4.4).Inserting the s
22、ample with one hand while lightly clamping with the other hand, as shown in Fig. 3.4.4 Clean the micrometer tips at regular intervals. Place cleaning material, such as clean dry paper, lint free cloth, cardboardor fabric (not abrasive such as sandpaper) in between the anvil and spindle. Tighten the
23、micrometer until lightly snug. Pull thecleaning material until free of the micrometer. Repeat until the micrometer is clean. Usually once or twice is adequate.4.5 Close the micrometer by turning the friction thimble and zero out (reset) the micrometer in accordance with manufacturersinstructions. Fo
24、r mechanical vernier micrometers, adjust the barrel to read zero in accordance with manufacturers instructions, andas mechanical micrometers are sensitive to barrel adjustments, recalibrate in accordance with the manufacturers instructions.4.6 Measure material thickness by opening the micrometer wid
25、e enough so the sample can be placed between the anvil andspindle tip. Turn the friction thimble until there is no further movement of the spindle. Spin the friction thimble one further turnto secure the measurement. For electronic digital micrometers, read the viewing screen for the measurement. Fo
26、llow themanufacturers instructions for mechanical micrometers with or without vernier micrometer scales.4.7 Repeat measurements as required. Note that the micrometer readings are subject to the precision of the type of micrometerused.4.8 Recording Readings:4.8.1 If required on the sample, identify w
27、here the reading(s) was made using a circle, box, cross hairs, etc.4.8.2 In the measurement record of readings, use a traceable identification back to the sample or product that was measured.5. Calibration Checks5.1 It is common practice to calibrate micrometers on a regular basis in accordance with
28、 operational standards of each company.The micrometers must be calibrated to appropriate NIST or equivalent standards within the prescribed time limits. The maximumlength of time recommended between calibrations is one year.Electronic Digital Mechanical Digital Analog with Vernier Scale1Anvil 2Spind
29、le3Lock 4Thimble5Display 6Controls7Scale 8Vernier ScaleFIG. 1 Micrometer TypesA1073/A1073M 1725.2 Zero out the micrometer.5.3 Measure at least three (3) (different) thicknesses so that the range of typical measurement is covered. Zero may be one ofthe reference measurements. Use NIST or equivalent t
30、raceable standards (test blocks) in increments of 0.050 in. that are withinthe thickness range of the product being measured. Example: To measure thin sheet such as 0.048 in., use zero and two standardsof 0.050000 in. 1.30 mm and 0.100000 in. 2.54 mm. Heavy thickness sheet such as 0.205 in., would u
31、se 0.200000 in 5.08 mm,0.250000 in. 6.35 mm, and 0.300000 in. 7.60 mm. If the micrometer readings of the standards (test blocks) are satisfactory, thedevice can be used to measure sheet steel with confidence.6. Proper Care of the Instrument6.1 Do not disassemble a digital micrometer.6.2 Store the mi
32、crometer at room temperature, typically 60 to 100F 16 to 38C. When measuring, let the micrometeracclimate to the ambient temperature of the sample. It is then appropriate to set the micrometer at zero.6.3 Keep the micrometer clean and in a clean environment.6.4 Keep micrometer away from liquids of a
33、ny kind.FIG. 2 Holding a MicometerFIG. 3 Mounted MicrometerA1073/A1073M 1736.5 Do not subject the micrometer to sudden shocks such as from dropping, or to excessive force during measuring.6.6 Wipe off dust, cutting chips, oil, and moisture from the micrometer after each use.6.7 When cleaning the mic
34、rometer, use a soft cloth using a neutral detergent. Do not use any organic solvent (thinner, etc.) asit may cause damage to the device.6.8 Do not use an electric marking pen or other such device on the micrometer.7. Accuracy Statement37.1 Accuracy of Electronic Digital Micrometers is 6 0.0003 in. 6
35、 0.008 mm.7.2 Accuracy of Vernier Micrometers is 6 0.0004 in. 6 0.010 mm.7.3 The accuracy statement was determined through statistical examination of four studies from 31 laboratories on steel samplesand NIST traceable standards.NOTE 1The studies used micrometers with resolutions of 0.0001 in. 0.002
36、54 mm or finer.8. Keywords8.1 micrometer; steel sheet; steel sheet metallic-coatedSUMMARY OF CHANGESCommittee A05 has identified the location of selected changes to this standard since the last issue(A1073/A1073M-16) that may impact the use of this standard. (Approved May 1, 2017.)(1) Added referenc
37、es to uncoated sheet specifications in 1.2 and Section 2.1; deleted reference to A917.ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of t
38、he validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn.You
39、r comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments
40、 have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or mult
41、iple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the Copyright Clearance Center, 222Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600; http:/ Supporting data have been filed at ASTM International Headquarters and may be obtained by requesting Research Report RR:A05-1005. Contact ASTM CustomerService at serviceastm.org.A1073/A1073M 174
