AWS C4.6M:2006 (R2012) (ISO 9013:2002 IDT)

An American National Standard

Thermal Cutting— Classification of Thermal Cuts— Geometric Product Specification and Quality Tolerances

AWS C4.6M:2006 (R2012) (ISO 9013:2002 IDT)

An American National Standard

Approved by the American National Standards Institute

July 10, 2006

Reaffirmed: October 30, 2012

Thermal Cutting—Classification of Thermal Cuts—Geometric Product Specification and Quality Tolerances

1st Edition

Prepared by the American Welding Society (AWS) C4 Committee on Oxyfuel Gas Welding and Cutting

Under the Direction of the AWS Technical Activities Committee

Approved by the AWS Board of Directors

Abstract

This is the U.S. national adoption of ISO 9013:2002, Thermal cutting — classification of thermal cuts — Geometric product specification and quality tolerances. It includes three national annexes (Criteria for Describing Oxygen-Cut Surfaces with a photograph of a Surface Roughness Guide, a list of reference documents available for individuals involved with Oxyfuel Gas Welding and Cutting, and a guide for the preparation of technical inquiries to AWS) as well as a list of published AWS documents on Oxyfuel Gas Welding and Cutting.

International Standard Book Number: 0-87171-012-9

American Welding Society 8669 Doral Blvd., Suite 130, Doral, FL 33166

© 2006 by American Welding Society

All rights reserved Printed in the United States of America Reaffirmed: October 30, 2012

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Statement on the Use of American Welding Society Standards

All standards (codes, specifications, recommended practices, methods, classifications, and guides) of the American Welding Society (AWS) are voluntary consensus standards that have been developed in accordance with the rules of the American National Standards Institute (ANSI). When AWS American National Standards are either incorporated in, or made part of, documents that are included in federal or state laws and regulations, or the regulations of other governmen- tal bodies, their provisions carry the full legal authority of the statute. In such cases, any changes in those AWS standards must be approved by the governmental body having statutory jurisdiction before they can become a part of those laws and regulations. In all cases, these standards carry the full legal authority of the contract or other document that invokes the AWS standards. Where this contractual relationship exists, changes in or deviations from requirements of an AWS standard must be by agreement between the contracting parties.

AWS American National Standards are developed through a consensus standards development process that brings together volunteers representing varied viewpoints and interests to achieve consensus. While AWS administers the process and establishes rules to promote fairness in the development of consensus, it does not independently test, evaluate, or verify the accuracy of any information or the soundness of any judgments contained in its standards.

AWS disclaims liability for any injury to persons or to property, or other damages of any nature whatsoever, whether special, indirect, consequential, or compensatory, directly or indirectly resulting from the publication, use of, or reliance on this standard. AWS also makes no guarantee or warranty as to the accuracy or completeness of any information published herein.

In issuing and making this standard available, AWS is neither undertaking to render professional or other services for or on behalf of any person or entity, nor is AWS undertaking to perform any duty owed by any person or entity to someone else. Anyone using these documents should rely on his or her own independent judgment or, as appropriate, seek the advice of a competent professional in determining the exercise of reasonable care in any given circumstances. It is assumed that the use of this standard and its provisions is entrusted to appropriately qualified and competent personnel.

This standard may be superseded by new editions. This standard may also be corrected through publication of amend- ments or errata, or supplemented by publication of addenda. Information on the latest editions of AWS standards includ- ing amendments, errata, and addenda is posted on the AWS web page (www.aws.org). Users should ensure that they have the latest edition, amendments, errata, and addenda.

Publication of this standard does not authorize infringement of any patent or trade name. Users of this standard accept any and all liabilities for infringement of any patent or trade name items. AWS disclaims liability for the infringement of any patent or product trade name resulting from the use of this standard.

AWS does not monitor, police, or enforce compliance with this standard, nor does it have the power to do so.

Official interpretations of any of the technical requirements of this standard may only be obtained by sending a request, in writing, to the appropriate technical committee. Such requests should be addressed to the American Welding Society, Attention: Managing Director, Technical Services Division, 8669 Doral Blvd., Suite 130, Doral, FL 33166 (see Annex E). With regard to technical inquiries made concerning AWS standards, oral opinions on AWS standards may be ren- dered. These opinions are offered solely as a convenience to users of this standard, and they do not constitute professional advice. Such opinions represent only the personal opinions of the particular individuals giving them. These individuals do not speak on behalf of AWS, nor do these oral opinions constitute official or unofficial opinions or interpretations of AWS. In addition, oral opinions are informal and should not be used as a substitute for an official interpretation.

This standard is subject to revision at any time by the AWS C4 Committee on Oxyfuel Gas Welding and Cutting. It must be reviewed every five years, and if not revised, it must be either reaffirmed or withdrawn. Comments (recommendations, additions, or deletions) and any pertinent data that may be of use in improving this standard are required and should be addressed to AWS Headquarters. Such comments will receive careful consideration by the AWS C4 Committee on Oxyfuel Gas Welding and Cutting and the author of the comments will be informed of the Committee’s response to the comments. Guests are invited to attend all meetings of the AWS C4 Committee on Oxyfuel Gas Welding and Cutting to express their comments verbally. Procedures for appeal of an adverse decision concerning all such comments are pro- vided in the Rules of Operation of the Technical Activities Committee. A copy of these Rules can be obtained from the American Welding Society, 8669 Doral Blvd., Suite 130, Doral, FL 33166.

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Personnel (Reaffirmation)

AWS C4 Committee on Oxyfuel Gas Welding and Cutting

M. J. Hogan, Chair Harris Products Group, A Lincoln Electric Company

1. B. Overvaag, 1st Vice Chair Smith Equipment Company, Division of ITW, Incorporated

   1. S. Werner, 2nd Vice Chair Breakthrough Business Solutions

   2. H. Abrams, Secretary American Welding Society

      J. F. Henderson Victor Technologies, Incorporated.

      L. L. Liston, Jr. Consultant

      C. R. McGowan McGowan Technical Services

      J. C. Papritan The Ohio State University

      A. T. Sheppard The DuRoss Group

      
      

      Advisors to the AWS C4 Committee on Oxyfuel Gas Welding and Cutting

      J. D. Compton JD & Associates

      J. G. Dawson, Jr. Consultant

      D. G. Howden Consultant

      J. D. Karow Messer Cutting Systems, (Ret.)

      
      

      
      

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      Personnel (Original)

      
      

      AWS C4 Committee on Oxyfuel Gas Welding and Cutting

      1. T. Sheppard, Chair The DuRoss Group

M. J. Hogan, 1st Vice Chair Harris Calorific, Division of The Lincoln Electric Company

1. B. Overvaag, 2nd Vice Chair Smith Equipment Company, Division of ITW

   1. M. Alonso, Secretary American Welding Society

J. D. Compton College of the Canyons

*J. G. Dawson, Jr. Consultant

M. D. English American Bridge Company

*D. Hambleton Smith Equipment Company, Division of ITW

*C. M. Hightower BMS, Incorporated

*R. E. Holt Retired

J. D. Karow American General Corporation

1. L. Liston, Jr. National Torch Tip

   1. R. McGowan McGowan Technical Services, Incorporated

   2. Mirgliotta Forest City Erectors, Incorporated

   D. A. Pryor Victor Equipment Company

   R. A. Smith Compressed Gas Association

   
   

   
   

   *Advisor

   AWS C4 Task Group

2. J. Hogan, Chair Harris Calorific, Division of The Lincoln Electric Company

1. M. Alonso, Secretary American Welding Society

   J. D. Karow American General Corporation

   D. B. Overvaag Smith Equipment Company, Division of ITW

   D. A. Pryor Victor Equipment Company

   A. T. Sheppard The DuRoss Group

   
   

   
   

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   Foreword

   This foreword is not part of AWS C4.6M:2006 (R2012) (ISO 9013:2002 IDT), Thermal Cutting— Classification of Thermal Cuts—Geometric Product Specification and Quality Tolerances,

   but is included for informational purposes only.

   
   

   This standard is the U.S. national adoption of ISO 9013:2002, Thermal cutting—Classification of thermal cuts— Geometric product specification and quality tolerances. Please note that for the purposes of this standard, the following editorial changes have been made for consistency:

   1. the decimal comma has been replaced by the decimal point and

   2. the words “this International Standard” have been replaced by “this standard.”

   This standard includes three national informative annexes which are an integral part of the national adoption of ISO 9013.

   Annex C, Criteria for Describing Oxygen-Cut Surfaces, was taken from AWS C4.1–77 and is included for informational purposes only. This document comes with a plastic Surface Roughness Guide for Oxygen Cutting that is shown in the annex.

   Annex D is a bibliography of reference documents recommended to all individuals involved with the oxyfuel gas weld- ing and cutting of sheet, plate, extrusion, pipe, and other forms of materials using manual or mechanized oxyfuel gas torch welding and cutting equipment.

   Annex E, Guidelines for the Preparation of Technical Inquiries, is the required procedure for sending inquiries to the AWS regarding AWS C4.6M:2006 (ISO 9013:2002 IDT), Thermal Cutting—Classification of Thermal Cuts—Geometric Product Specification and Quality Tolerances.

   A list of AWS documents on Oxyfuel Gas Welding and Cutting which are available to the public is also included. This standard makes sole use of the International System of Units (SI).

   Safety and health issues and concerns are beyond the scope of this standard, and therefore are not fully addressed herein. Safety and health information is available from other sources, including, but not limited to, ANSI Z49.1, Safety in Welding, Cutting, and Allied Processes and applicable federal and state regulations.

   Comments and suggestions for the improvement of this standard are welcome. They should be sent to the Secretary, AWS C4 Committee on Oxyfuel Gas Welding and Cutting, American Welding Society, 8669 Doral Blvd., Suite 130, Doral, FL 33166.

   
   

   
   

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   Table of Contents

   
   

   Page No.

   Personnel (Reaffirmation) v

   Personnel (Original) vii

   Foreword ix

   List of Tables xii

   List of Figures xii

   1. Scope 1

   2. Normative references 1

   3. Terms and definitions 2

      1. General 2

      2. Terms and definitions explained by figures 2

   4. Symbols 7

   5. Form and location tolerances 8

   6. Determination of the quality of cut surfaces 8

      1. General 8

      2. Measuring 9

   7. Quality of the cut surface 11

      1. Characteristic values 11

      2. Measuring ranges 12

   8. Dimensional tolerances 15

      1. General 15

      2. Dimensional tolerances on parts without finishing 16

      3. Dimensional tolerances on parts with finishing 17

   9. Designation 18

   10. Information in technical documentation 18

       1. Indications of size 18

       2. Indication of quality of cut surface and of tolerance class 18

Annex A (informative) Achievable cutting qualities for different cutting processes 21

Annex B (informative) Principles of process 25

Bibliography 27

National Informative Annexes 29

Annex C (Informative)—Criteria for Describing Oxygen-Cut Surfaces 29

Annex D (Informative)—Bibliography 33

Annex E (Informative)—Guidelines for the Preparation of Technical Inquiries 35

List of AWS Documents on Oxyfuel Gas Welding and Cutting 37

List of Tables

Table Page No.

1. Precision measuring instruments 9

2. Coarse measuring instruments 9

3. Dimensions for Δa 10

4. Perpendicularity or angularity tolerance, u 12

5. Mean height of the profile, Rz5 12

6. Limit deviations for nominal dimensions tolerance class 1 16

7. Limit deviations for nominal dimensions tolerance class 2 16

8. Machining allowance, Bz 18

List of Figures

Figure Page No.

1. Terms related to the cutting process of the work piece 2

2. Terms on the finished work piece 3

3. Straight cut 3

4. Contour cut 4

5. Drag line 4

6. Perpendicularity and angularity tolerances 5

7. Mean height of the profile 6

8. Melting 6

9. Gouging 7

10. Form and location tolerances shown by the example of a sheet plate 8

11. Definition of the measuring range for perpendicularity and angularity tolerances 11

12. Perpendicularity or angularity tolerance, u 13

13. Mean height of the profile, Rz5 14

14. Dimensional tolerances on parts without finishing 17

15. Dimensional tolerances on parts with finishing 17

1. Typical cutting qualities achievable with perpendicularity or angularity tolerance, u —

   Work piece thickness up to 30 mm 22

2. Typical cutting qualities achievable with perpendicularity or angularity tolerance, u —

   Work piece thickness up to 150 mm 22

3. Typical cutting qualities achievable with mean height of the profile, rz5 — Work piece

   thickness up to 30 mm 23

4. Typical cutting qualities achievable with mean height of the profile, rz5 — Work piece

thickness up to 150 mm 23

1. Flatness 30

2. Draglines 30

3. Roughness 30

4. Notch 31

5. Angularity 31

6. Top Edge Rounding 31

7. Slag 32

8. C4.1–77 Surface Roughness Guide for Oxygen Cutting 32