1、ASME B32.100-2005(Consolidation of ASME B32.3M and B32.4M)Preferred MetricSizes for Flat,Round,Square,Rectangular,and HexagonalMetal ProductsAN AMERICAN NATIONAL STANDARDThe American Society ofMechanical EngineersThree Park Avenue.New York,NY 10016Date of Issuance:September 12.2005This Standard will
2、 be revised when the Society approves the issuance of a new edition.There will beno addenda issued to this edition.ASME issues written replies to inquiries concerning interpretations of technical aspects of this Stan-dard.Interpretations are published on the ASME Web site under the Committee Pages a
3、thttp:/www.asme.org/codes/as they are issued.ASME is the registered trademark of The American Society of Mechanical Engineers.This code or standard was developed under procedures accredited as meeting the criteria for American National Stan-dards.The Standards Committee that approved the code or sta
4、ndard was balanced to assure that individuals from com-petent and concerned interests have had an opportunity to participate.The proposed code or standard was made avail-able for public review and comment that provides an opportunity for additional public input from industry,academia,regulatory agen
5、cies,and the public-at-large.ASME does not approve,rate,or endorseany item,construction,proprietary device,or activity.ASME does not take any position with respect to the validity of any patent rights asserted in connection with any itemsmentioned in this document,and does not undertake to insure an
6、yone utilizing a standard against liability for infringe-ment of any applicable letters patent,nor assumes any such liability.Users of a code or standard are expressly advisedthat determination of the validity of any such patent rights,and the risk of infringement of such rights,is entirely theirown
7、 responsibility.Participation by federal agency representative(s)or person(s)affiliated with industry is not to be interpreted as gov-ernment or industry endorsement of this code or standard.ASME accepts responsibility for only those interpretations of this document issued in accordance with the est
8、ablishedASME procedures and policies,which precludes the issuance of interpretations by individuals.No part of this document may be reproduced in any form,in an electronic retrieval system or otherwise,without the prior written permission of the publisher.The American Society of Mechanical Engineers
9、Three Park Avenue,New York,NY 10016-5990Copyright 2005 byTHE AMERICAN SOCIETY OF MECHANICAL ENGINEERSAll rights reservedPrinted in U.S.A.CONTENTSForeword.ivAcknowledgementivCommittee RosterCorrespondence With the B32 Committee.vi1Scope12General13Use of Tables.EE.E:.E.EE14 Basis of Tables21Tables1 Pr
10、eferred Thicknesses,D(mm),for All Flat Metal Products32Preferred Widths(mm)for Flat Metal Products。23Preferred Lengths(mm)for Flat Metal Products.24Preferred Diameters,D(mm),of Round Metal Products.35Preferred Across Flat Sizes,D(mm),of Square Metal Products.6Preferred Across Flat Sizes,D(mm),of Hex
11、agonal Metal Products47Preferred Lengths(mm)of Round,Square,Rectangular,and Hexagonal48Preferred Across Flat Sizes(mm)of Rectangular Metal Products.59Thickness Tolerances(mm)for Hot-Rolled Steel Sheet of Structural Qualities(1S04995,1S05002).610 Thickness Tolerances(mm)for Cold-Rolled Steel Sheet of
12、 Structural Qualities(S04997).611 Tolerance(mm)for Hot-Rolled,Round,Square,and Hex Steel Bars(ISO 1035-4).612 Tolerances(mm)for Hot-Rolled Flat Bars(ISO 1035-4).613 Tolerance(mm)for Cold-Finished,Round,Square,and Hex Steel Bars(ANSI B4.2).Nonmandatory AppendixA Related Standards.9i进FOREWORDThe U.S.D
13、epartment of Commerce,in its July 1971 report to Congress titled A Metric America-A Decision Whose Time Has Come,recommended that the United States should change to themetric system of measurement through a coordinated national program.This action,along withsubsequent increased metric activity in in
14、dustry,resulted in a number of requests from produc-ers and users that the B32 Committee develop preferred series of metric sizes for the variousforms of wrought metal mill products.The B32.100 standard is based on the previously published standards B32.3M-1984 and B32.4M-1980.Development of these S
15、tandards was started in 1973.The proposal received Standards Com-mittee B32 approval on June 4,1974.It was subsequently approved by the sponsor and submit-ted to the American National Standards Institute for designation as an American NationalStandard.This was granted on July 9,1974.The last edition
16、 was approved by the American Na-tional Standards Institute on September 24,1984 and reaffirmed in 1994.The sizes in this Standard are derived from a list of preferred metric sizes in which each num-ber is approximately 60%greater than the number preceding it(ANSI B4.2 or ISO 497 Series R5).Second C
17、hoice sizes are in increments of 25%(Series R10)and Third Choice sizes in incrementsof 12%(Series R20).Some deviations from this principle occur as the result of minor rounding.The selected sizes also reflect standard material sizes in ISO and national standards in traditionalmetric countries.In 200
18、2,the B32 Committee established a Task Force to draft new metric standards for the fol-lowing product groups:(a)ASME B32.100-200X Preferred Metric Sizes for Flat,Round,Square,Rectangular,and Hexag-onal Metal Products;(b)ASME B32.200-200X Preferred Metric Sizes for Round,Square,and Rectangular Tubula
19、rMetal Products Other Than Pipe;and(c)ASME B32.300-200X Preferred Metric Sizes for Equal and Unequal Leg Angles,T-andChannel-Sections,IPN-and Wide Flange-Beams Structural Steel.Material tolerances must be included in order to fully define the size of a product.Internationalor leading national metric
20、 standards data were used as the basis for the tolerance data includedin this Standard.References to the sources of these tolerances have been made,and a list of re-lated standards are shown in Nonmandatory Appendix A.Figures are shown throughout theStandard to help speed up the search for the mater
21、ial type needed.The present edition was approved by the American National Standards Institute on February11,2005.ACKNOWLEDGEMENTFigures in this Standard are copied from the book,Metric Standards,for Worldwide Manufac-turing,with the permission of the publishers,ASME Press and KOK metricUSA.org,Inc.Datashown in this Standard were developed with the help of the global standards material publishedin the same publication.iv
