G40.20-13/G40.21-13

General requirements for rolled or welded structural quality steel/Structural quality steel

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G40.20-13/G40.21-13July 2013

Title: General requirements for rolled or welded structural quality steel/Structural quality steelPagination: 108 pages (ix preliminary and 99 text), each dated July 2013

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G40.20-13/G40.21-13General requirements for rolled or

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© 2013 CSA GroupGeneral requirements for rolled or welded

structural quality steel/Structural quality steel

July 2013 iii

ContentsTechnical Committee on Structural Steel viii

Preface ix

G40.20-13, General requirements for rolled or welded structural quality steel

1 Scope 3

2 Reference publications 3

3 Definitions 53.1 Product definitions 53.2 General definitions 6

4 Chemical composition 84.1 Heat analysis 84.2 Product analysis 8

5 Permissible variations in dimensions or mass 95.1 Density 95.2 Plate 95.3 Structural-size shapes 95.4 Sheet piling 95.5 Sheet 95.6 Bars and bar-size shapes 95.7 Welded shapes 95.8 Hollow sections 95.8.1 Permissible variations for dimensions and workmanship of hollow sections 95.8.2 Permissible variation in mass of welded or seamless hollow sections 95.8.3 Permissible variation in wall thickness of welded or seamless hollow sections 105.8.4 Permissible variations in cross-sectional dimensions of welded or seamless hollow sections 105.8.5 Maximum outside corner radii for rectangular sections of welded or seamless hollow sections 105.8.6 Corner squareness of welded or seamless hollow sections 105.8.7 Permissible variation in straightness of welded or seamless hollow sections 105.8.8 Permissible twist of welded or seamless hollow sections 105.9 Super light beams 105.10 Cold-formed channels and Z sections 105.10.1 Permissible variations in sectional dimensions of cold-formed channels and Z sections 105.10.2 Permissible variation in thickness of cold-formed channels and Z sections 105.10.3 Permissible variations in ordered lengths of cold-formed channels and Z sections 115.10.4 Permissible variation in straightness of cold-formed channels and Z sections 115.10.5 Corner squareness of cold-formed channels and Z sections 115.10.6 Inside corner radii of cold-formed channels and Z sections 11

6 Testing — General 11

7 Test specimens 127.1 Test specimen location 127.1.1 General 127.1.2 Tensile and hardness test specimens 127.1.3 Impact test specimens 13

G40.20-13/G40.21-13 © 2013 CSA Group

iv July 2013

7.2 Test specimen preparation 147.2.1 Tension tests 147.2.2 Impact tests 14

8 Methods of testing 158.1 Mechanical testing 158.2 Gripping of specimen 158.3 Adjustment of ductility requirements for material thickness 158.3.1 Plates, shapes, welded shapes, sheet, bars, and hollow sections 158.3.2 Sheet 168.4 Austenitic grain size test 16

9 Frequency of testing 169.1 Mechanical tests of as-rolled and normalized steel 169.1.1 Tensile test samples 169.1.2 Impact test samples 169.1.3 Size groups 179.1.4 Additional tensile tests 179.1.5 Additional impact tests 179.2 Mechanical tests of quenched and tempered steel 189.3 Per piece testing 189.3.1 Sections with a mass of more than 5000 kg (5 tons) each and plates 189.3.2 Sections with a mass of less than 5000 kg (5 tons) each, hollow sections, sheet piling, and bars 189.4 Testing of samples 189.5 Grouped heat testing 199.6 Grain size test 19

10 Heat treatment 1910.1 Normalizing 1910.2 Quenching and tempering 19

11 Quality 1911.4 Conditioning of plates (including plates for welded shapes) 2011.5 Conditioning of rolled structural-size shapes, bar-size shapes, and steel sheet piling 2011.6 Conditioning of bars (including bars for welded shapes) 2111.7 Conditioning of hollow sections 2111.8 Conditioning of sheets 22

12 Repair of defects by welding 22

13 Marking 2213.1 Plates 2213.2 Sheet 2313.3 Structural-size shapes 2313.4 Bars 2313.5 Hollow sections 2413.6 Cold-formed channels and Z sections 2413.7 Per piece identification 2413.8 Stamps 2413.9 Colour marking 2413.10 Bar coding 24

14 Retests 2514.1 General 2514.2 Tensile tests 2514.3 Impact tests 25

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© 2013 CSA GroupGeneral requirements for rolled or welded

structural quality steel/Structural quality steel

14.3.1 General 2514.3.2 Plate-lot testing 2514.3.3 Sections, hollow structural sections, bars, and sheet piling 2614.4 Defective test specimens 2614.5 Resubmission 26

15 Welded shape requirements 2615.1 General 2615.1.1 Material 2615.1.2 Fabrication 2615.2 Welding 2615.3 Weld inspection and quality requirements 2715.4 Weld quality control tests 2715.5 Repair of welds 2815.6 Marking 28

16 Certification 28

17 Inspection 29

18 Rejection 29

AnnexesA (informative) — Index to tables and referenced publications 46

Tables1 — Structural shape size groupings for tensile property classification 292 — Minimum average impact energy for subsize specimens 303 — Full-section test angles 304 — Permissible variations from flatness for carbon, hsla, and alloy steel plates, as-rolled or heat-treated,

ordered to restrictive flatness 315 — Permissible variations in sectional dimensions for super light beams and channels 336 — Permissible variations in straightness for super light beams and steel sheet piling 337 — Permissible variations in web thickness of super light beams 348 — Permissible variations in sectional dimensions for welded structural shapes 349 — Permissible variations in straightness for welded structural shapes 3510 — Permissible variation in mass of welded or seamless hollow sections 3511 — Permissible variation in wall thickness of welded or seamless hollow sections 3512 — Permissible variations in cross-sectional dimensions of welded or seamless hollow sections 3613 — Maximum outside corner radii for rectangular sections of welded or seamless hollow sections 3614 — Corner squareness of welded or seamless hollow sections 3715 — Permissible variation in straightness of welded or seamless hollow sections 3716 — Permissible twist of welded or seamless hollow sections 3817 — Permissible variations in ordered lengths of welded or seamless hollow sections 3818 — Permissible variation in thickness of cold-formed channels and Z sections 3819 — Permissible variations in ordered lengths of cold-formed channels and Z sections 3920 — Permissible variation in straightness of cold-formed channels and Z sections 3921 — Corner squareness of cold-formed channels and Z sections 3922 — Inside corner radii of cold-formed channels and Z sections 3923 — Permissible variations in sectional dimensions of cold-formed channels and Z sections 4024 — Thickness overtolerance of sheet 41

Figures1 — Position of test pieces for tensile tests 42

G40.20-13/G40.21-13 © 2013 CSA Group

vi July 2013

2 — Position of test pieces for impact tests 433 — Specimen for welded-tee tension test 444 — Fixture for welded-tee tension test 45

G40.21-13, Structural quality steel

1 Scope 51

2 Reference publications 52

3 Definitions 52

4 General requirements 534.1 General 534.2 Grades 534.3 Schedule of tests 534.4 Test requirements 534.5 Maximum carbon equivalent 534.6 Basis of purchase 534.7 Size designations and dimensions 544.8 Hollow sections — End condition 54

5 Manufacturing 54

6 Supply condition 556.1 General 556.2 Hollow structural sections 556.3 As-rolled condition 556.4 Material tested in the normalized condition 566.5 Controlled or normalizing rolling 566.6 Quenched and tempered steels 566.7 Material requirements for cold-formed channels and Z sections 566.7.1 Material 56

7 Chemical composition 567.1 Heat analysis 567.2 Product analysis 567.3 Heat analysis reporting 577.4 Grouped heat lots 577.5 Alternative compositions 577.6 Atmospheric corrosion-resistance 577.7 Grades 345WM/50WM and 345WMT/50WMT 57

8 Mechanical properties 588.1 Tensile properties 588.2 Impact properties 58

9 Marking 58

Tables1 — Grades, types, and strength levels 592 — Schedule of tests 603 — Chemical composition by heat analysis of plates, floor plates, bars, shapes, sheet, and sheet

piling 614 — Chemical composition by heat analysis of API plates 63

July 2013 vii

© 2013 CSA GroupGeneral requirements for rolled or welded

structural quality steel/Structural quality steel

5 — Chemical composition by heat analysis of hollow sections 646 — Mechanical properties of plates, floor plates, bars, sheet, and welded shapes 657 — Mechanical properties of rolled shapes and sheet piling 698 — Mechanical properties of hollow sections 719 — Standard Charpy impact specimens 7310 — Colour codes 7511(a)(i) — Welded wide-flange shapes 7611(a)(ii) — Welded reduced-flange shapes 8211(b) — Super light beams 8411(c) — Hollow structural sections — Rounds 8511(d) — Hollow structural sections — Squares 8811(e) — Hollow structural sections — Rectangles 9111(f) — Cold-formed channels — Coated 9311(g) — Cold-formed channels — Uncoated 9511(h) — Cold-formed Z sections — Uncoated 98

G40.20-13/G40.21-13 © 2013 CSA Group

viii July 2013

Technical Committee on Structural Steel

E.J. Whalen Canadian Institute of Steel Construction,Markham, Ontario

Chair

S. England Cherubini Metal Works Limited,Dartmouth, Nova Scotia

Vice-Chair, Secretary

S. Antenucci Welded Tube of Canada Ltd., Concord, Ontario

D.L. Bradley Essar Steel Algoma Inc.,Sault Ste Marie, Ontario

C. D’Souza EVRAZ Inc. NA Canada, Regina, Saskatchewan

G. Grondin The University of Alberta, Edmonton, Alberta

E. Hannah Gerdau Cambridge Mill Ontario Canada,Cambridge, Ontario

P. King Rapid-Span Structures Ltd., Armstrong, British Columbia

P.L. Loh Facca Incorporated, London, Ontario

D.R. Luciani CWB Group, Milton, Ontario

D.H. MacKinnon Canadian Institute of Steel Construction (CISC-ICCA), Markham, Ontario

Associate

G. Sett ArcelorMittal Dofasco, Hamilton, Ontario

N. Theodor Ministry of Transportation Ontario,St. Catharines, Ontario

A. Waheed Alberta Infra Structure Bridge Engineering,Edmonton, Alberta

M. Whalen Atlas Tube Inc.,Harrow, Ontario

G.D. Wilson Horton CBI Limited,Niagara on the Lake, Ontario

J. Fisher CSA Group,Mississauga, Ontario

Project Manager

© 2013 CSA GroupGeneral requirements for rolled or welded

structural quality steel/Structural quality steel

July 2013 ix

Preface

This is the seventh edition of CSA G40.20/G40.21, General requirements for rolled or welded structural quality steel/Structural quality steel. It supersedes previous editions published in 2004, 1998, 1992, 1987, 1981, and 1978.

This edition comprises new amendments approved by the Technical Committee. These include(a) reference to ASTM A924/A924M for metallic-coated by the hot-dip process;(b) updated plate and sheet dimension sizes to align with ASTM;(c) the addition of a new definition for “normalized roll”;(d) change to allow niobium and vanadium to be used for grain refining;(e) the addition of new grades 345WM (50WM), 345WMT (50WMT), 450W (65W), and 450WT (65WT);(f) updated yield values in G40.21, Table 6 for grade 380 and up steel thickness greater than 65 mm;

and(g) alignment in the mechanical properties between the W and WT grades.

These Standards are written in SI (metric) units, with imperial units included in parentheses. The SI units are in conformance with CSA Z234.1.

While the technical requirements of the metric and imperial versions are virtually the same, some differences do occur. Either the SI or the imperial units must be used, and any attempt to intermingle the two systems of units on any specific purchase of material may result in nonconformance with the Standards.

These Standards have been harmonized to the maximum possible extent with equivalent ASTM Standards, A6/A6M and A568/A568M.

These Standards were prepared by the Technical Committee on Structural Steel, under the jurisdiction of the Strategic Steering Committee on Welding and Structural Metals, and have been formally approved by the Technical Committee.

Notes: (1) Use of the singular does not exclude the plural (and vice versa) when the sense allows.(2) Although the intended primary application of this Standard is stated in its Scope, it is important to note that it remains

the responsibility of the users of the Standard to judge its suitability for their particular purpose.(3) This Standard was developed by consensus, which is defined by CSA Policy governing standardization — Code of

good practice for standardization as “substantial agreement. Consensus implies much more than a simple majority, but not necessarily unanimity”. It is consistent with this definition that a member may be included in the Technical Committee list and yet not be in full agreement with all clauses of this Standard.

(4) To submit a request for interpretation of this Standard, please send the following information to inquiries@csagroup.org and include “Request for interpretation” in the subject line:(a) define the problem, making reference to the specific clause, and, where appropriate, include an illustrative sketch;(b) provide an explanation of circumstances surrounding the actual field condition; and(c) where possible, phrase the request in such a way that a specific “yes” or “no” answer will address the issue.Committee interpretations are processed in accordance with the CSA Directives and guidelines governing

standardization and are available on the Current Standards Activities page at standardsactivities.csa.ca.(5) This Standard is subject to review five years from the date of publication. Suggestions for its improvement will be

referred to the appropriate committee. To submit a proposal for change, please send the following information to inquiries@csagroup.org and include “Proposal for change” in the subject line:(a) Standard designation (number);(b) relevant clause, table, and/or figure number;(c) wording of the proposed change; and(d) rationale for the change.

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G40.20-13General requirements for rolled or

welded structural quality steel

© 2013 CSA Group General requirements for rolled or welded structural quality steel

July 2013 3

G40.20-13General requirements for rolled or welded structural quality steel

1 Scope

1.1This Standard outlines the requirements that apply, unless otherwise specified in a purchase order or individual standard, to structural quality steel plates, shapes, sheet, sheet piling, cold-formed channels, hollow sections, Z sections, and bars conforming to the requirements of CSA G40.21.

Tables 11(a) to (h) of CSA G40.21 provide information on the dimensions and mass (weight) per unit length of structural shapes and sections commonly used in the construction of steel buildings and bridges.

1.2In this Standard, “shall” is used to express a requirement, i.e., a provision that the user is obliged to satisfy in order to comply with the standard; “should” is used to express a recommendation or that which is advised but not required; and “may” is used to express an option or that which is permissible within the limits of the standard.

Notes accompanying clauses do not include requirements or alternative requirements; the purpose of a note accompanying a clause is to separate from the text explanatory or informative material.

Notes to tables and figures are considered part of the table or figure and may be written as requirements.

Annexes are designated normative (mandatory) or informative (nonmandatory) to define their application.

1.3The values given in SI units are the units of record for the purposes of this Standard. The values given in parentheses are for information and comparison only.

2 Reference publicationsThis Standard refers to the following publications, and where such reference is made, it shall be to the edition listed below.Note: In cases where the editions listed below are replaced by newer editions during the life of this referencing Standard, users of this Standard are encouraged to investigate the possibility of applying the most recent editions.

CSA GroupG40.21-13Structural quality steel

CAN/CSA-G40.23-94 (withdrawn)Steel — Surface finish of hot-rolled plates and wide flats — Delivery requirements

W47.1-09Certification of companies for fusion welding of steel

G40.20-13 © 2013 CSA Group

4 July 2013

W48-06 (R2011)Filler metals and allied materials for metal arc welding

W59-03 (R2008)Welded steel construction (metal arc welding)

API (American Petroleum Institute)620Eleventh Edition, February 2008Addendum 2, March 2010Design and Construction of Large, Welded, Low-Pressure Storage Tanks

650Eleventh Edition, June 2007Addendum 2, November 2009Welded Steel Tanks for Oil Storage

ASME (American Society of Mechanical Engineers)Boiler and Pressure Vessel Code, 2010, Section IX, “Welding and Brazing Qualifications”

ASTM (American Society for Testing and Materials)A6/A6M-12aStandard Specification for General Requirements for Rolled Structural Steel Bars, Plates, Shapes, and Sheet Piling

A29/A29M-12Standard Specification for Steel Bars, Carbon and Alloy, Hot-Wrought, General Requirements for

A53/A53M-12Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and Seamless

A370-12aStandard Test Methods and Definitions for Mechanical Testing of Steel Products

A435/A435M-90 (R2012)Standard Specification for Straight-Beam Ultrasonic Examination of Steel Plates

A568/A568M-11bStandard Specification for Steel, Sheet, Carbon, and High-Strength, Low-Alloy, Hot-Rolled and Cold-Rolled, General Requirements for

A577/A577M-90 (R2007)Standard Specification for Ultrasonic Angle-Beam Examination of Steel Plates

A578/A578M-07Standard Specification for Straight-Beam Ultrasonic Examination of Rolled Steel Plated for Special Applications

A 653/A 653M-10Standard Specification for Steel Sheet, Zinc-Coated (Galvanized) or Zinc-Iron Alloy-Coated (Galvannealed) by the Hot-Dip Process

A751-08Standard Test Methods, Practices, and Terminology for Chemical Analysis of Steel Products