1、Designation: A1087/A1087M 13A1087/A1087M 16Standard Practice forUsing Hand Calipers to Measure the Width of Steel Sheet1This standard is issued under the fixed designation A1087/A1087M; the number immediately following the designation indicates theyear of original adoption or, in the case of revisio
2、n, 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 for measuring the width of steel sheet when decimal, not fracti
3、on tolerances are indicated.The ability to accurately measure width using hand calipers is critical in determining if product meets decimal specifications. Themethods described are designed and intended for use in the laboratory, mill situations, and general use.1.2 The flat steel product shall conf
4、orm to all the requirements of the appropriate specifications as follows: Specifications A917and A924/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 u
5、ser.1.4 This specification is applicable to orders in either inch-pound units 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 addr
6、ess all of the safety concerns, if any, associated with its use. It is the responsibilityof the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatorylimitations prior to use.2. Referenced Documents2.1 ASTM Standards:2A902 Terminology
7、 Relating to Metallic Coated Steel ProductsA917 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
8、Hot-Dip Process3. Terminology3.1 Definitions:See Terminology A902 for definitions of general terminology.3.2 The definitions and procedures for measuring width characteristics of steel sheet products are provided so that purchasersand suppliers have common definitions and measuring procedures for wi
9、dth measurements. The intention of these definitions andmeasuring methods is not to provide dimensional specifications for width characteristics, but rather common procedure(s) forquantifying width values. For determining compliance with width specifications, references are provided to appropriate A
10、STMstandards.4. Apparatus4.1 Calipers used for width measurement shall be constructed with parallel blades so the sheet can be placed between them formeasurement. The outside blades of a caliper are used to measure the width of steel sheet; inside blades of a caliper are used tomeasure internal dime
11、nsions of non-sheet products. Calipers can be electrical digital, dial or analog with vernier scale, as shownin the photographs. See Fig. 1 and Fig. 2.4.2 Unlock the caliper and if electrical digital, turn it on.1 This test method is under the jurisdiction of ASTM Committee A05 on Metallic-Coated Ir
12、on and Steel Products and is the direct responsibility of Subcommittee A05.07on Methods of Testing.Current edition approved Dec. 15, 2013May 1, 2016. Published January 2014May 2016. Originally approved in 2013. Last previous edition approved in 2013 asA1087/A1087M-13. DOI: 10.1520/A1087_A1087M-1310.
13、1520/A1087_A1087M-16.2 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM 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 an
14、d is intended only to provide the user of an ASTM standard an indication of what changes have been 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
15、the current versionof the standard as published by ASTM is to be considered the official document.*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 States14.3 Clean caliper blade
16、s prior to use. Place cleaning material, such as clean dry paper, lint-free cloth, or fabric (not abrasive suchas sandpaper) on the outside blades and wipe clean. Repeat until the caliper is clean. Usually once or twice is adequate.4.4 The typical method to hold or secure the caliper is to grasp the
17、 caliper, as shown in Fig. 3, with right hand and the sheetin left hand.FIG. 1 acFIG. 2FIG. 3A1087/A1087M 1624.5 Close the caliper by rotating the thumb wheel or sliding the movable blade toward the fixed blade. The caliper is acceptablefor use if it reads zero. If not, for electronic digital calipe
18、rs, zero out (reset) the caliper per manufacturers instructions. For dialand vernier calipers, adjust them to read zero per manufacturers instructions.NOTE 1Mechanical calipers are sensitive to use and adjusting, recalibrate per manufacturers instructions.4.6 Measure the material width by holding th
19、e caliper with the right hand and sheet with the left hand. Open the caliper bladeslarge enough so the sheet can be placed between the blades. Place the sheet fully within the outside blades and then tighten theoutside blades until contact is made on the outside edges of the sheet. For electronic di
20、gital calipers, read the viewing screen forthe measurement. Follow the manufacturers instructions for vernier scale or dial readout calipers.4.7 Repeat the measurement at the same location. If the reading matches the original measurement value, accept the reading.If the value does not match, take an
21、 additional reading. Average the three readings to arrive at the measurement value. Note thatthe caliper readings are subject to the accuracy of the type of caliper used.4.8 Recording readings4.8.1 If required on the sheet sample, identify where the reading(s) was made using a circle, box, cross hai
22、rs, etc.4.8.2 In the measurement record of readings, use a traceable identification back to the sheet sample.5. Calibration Checks5.1 It is common practice to calibrate calipers to NIST traceable standards on an annual basis.5.2 Zero out the caliper.5.3 Measure an NIST traceable standard. Use a widt
23、h standard in increments of 6.000 in. 150 mm that is in the width rangeof the sheet steel being measured. Example: to measure, use two standards that bracket the sample width within a range of 6.000in. 150 mm. If the caliper readings of the standards are satisfactory the device can be used to measur
24、e sheet steel with confidence.If the caliper readings are out by more than 0.001 in. 0.025 mm, the device requires adjustment. See manufacturers instructions.6. Proper Care of the Instrument6.1 Do not disassemble a digital caliper.6.2 Store the caliper at room temperature, typically 60 to 100 F 16 t
25、o 38 C.6.3 Keep the caliper clean and in a clean environment.6.4 Keep caliper away from liquids of any kind.6.5 Do not subject the caliper 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 caliper after each us
26、e.6.7 When cleaning the caliper, use a soft cloth using a neutral detergent. Do not use any organic solvent (thinner, etc.) as it maycause damage to the device.6.8 Do not use an electric marking pen or other such device on the caliper.7. Accuracy Statement37.1 Accuracy of Electronic Digital Calipers
27、 is 6 0.002 in. 6 0.05 mm.7.2 Accuracy of Dial Calipers is is 6 0.003 in. 6 0.08 mm.7.3 Accuracy of Vernier Calipers is 6 0.003 in. 6 0.08 mm.7.4 The accuracy statement was determined through statistical examination.NOTE 2The studies used Calipers with resolutions of: Electronic Digital 0.0005 in. 0
28、.013 mm, Dial 0.001 in. 0.025 mm, Vernier 0.001 in. 0.025mm.8. Keywords8.1 caliper; steel sheet; steel-sheetmetallic-coated3 Supporting data have been filed at ASTM International Headquarters and may be obtained by requesting Research Report RR:A05-1006. Contact ASTM CustomerService at serviceastm.o
29、rg.A1087/A1087M 163SUMMARY OF CHANGESCommittee A05 has identified the location of selected changes to this standard since the last issue(A1087/A1087M13) that may impact the use of this standard.(1) Added new Section 7 and renumbered Keywords section.ASTM International takes no position respecting th
30、e validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard i
31、s 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.Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Hea
32、dquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This st
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