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1、AS 14422007 Australian Standard Carbon steels and carbon-manganese steelsHot rolled bars and semi- finished products AS 14422007 This Australian Standard was prepared by Committee MT-001, Iron and Steel. It was approved on behalf of the Council of Standards Australia on 20 April 2007. This Standard
2、was published on 20 September 2007. The following are represented on Committee MT-001: Australasian Railways Association Australian Building Codes Board Australian Foundry Institute Australian Industry Group Bureau of Steel Manufacturers of Australia Materials Australia This Standard was issued in d
3、raft form for comment as DR 06601. Standards Australia wishes to acknowledge the participation of the expert individuals that contributed to the development of this Standard through their representation on the Committee and through public comment period. Keeping Standards up-to-date Keeping Standard
4、s up-to-date Australian Standards are living documents that reflect progress in science, technology and systems. To maintain their currency, all Standards are periodically reviewed, and new editions are published. Between editions, amendments may be issued. Standards may also be withdrawn. It is imp
5、ortant that readers assure themselves they are using a current Standard, which should include any amendments that may have been published since the Standard was published. Detailed information about Australian Standards, drafts, amendments and new projects can be found by visiting w www.standards.or
6、g.auww.standards.org.au Standards Australia welcomes suggestions for improvements, and encourages readers to notify us immediately of any apparent inaccuracies or ambiguities. Contact us via email at mailstandards.org.aumailstandards.org.au, or write to Standards Australia, GPO Box 476, Sydney, NSW
7、2001. AS 14422007 Australian Standard Carbon steels and carbon-manganese steelsHot rolled bars and semi- finished products Originated in part as AS G71961. Previous edition AS 14421992. Fifth edition 2007. COPYRIGHT Standards Australia All rights are reserved. No part of this work may be reproduced
8、or copied in any form or by any means, electronic or mechanical, including photocopying, without the written permission of the publisher. Published by Standards Australia, GPO Box 476, Sydney, NSW 2001, Australia ISBN 0 7337 8251 5 AS 14422007 2 PREFACE This Standard was prepared by the Australian m
9、embers of the Joint Standards/Standards New Zealand Committee MT-001, Iron and Steel to supersede AS 14421992, Carbon steels and carbon-manganese steelsHot rolled bars and semi-finished products. After consultation with stakeholders in both countries, Standards Australia and Standards New Zealand de
10、cided to develop this Standard as an Australian, rather than an Australian/New Zealand Standard. The objective of the Standard is to specify the general technical delivery requirements for carbon steels and carbon-manganese steels in the hot rolled or semi-finished condition, including the requireme
11、nts for sampling and testing. The objective of this revision is to update the referenced documents and to apply current style. The terms normative and informative have been used in this Standard to define the application of the appendix to which they apply. A normative appendix is an integral part o
12、f a Standard, whereas an informative appendix is only for information and guidance. Statements expressed in mandatory terms in footnotes to tables are deemed to be requirements of this Standard. 3 AS 14422007 CONTENTS Page 1 SCOPE4 2 REFERENCED DOCUMENTS4 3 DEFINITIONS5 4 DESIGNATION6 5 MATERIALS7 6
13、 FREEDOM FROM DEFECTS8 7 SURFACE DRESSING 8 8 TENSILE TEST9 9 DIMENSIONAL TOLERANCES FOR RODS AND BARS 10 10 ROUNDING OF TEST RESULT VALUES. 10 11 MARKING . 10 APPENDICES A PURCHASING GUIDELINES 18 B MEANS FOR DEMONSTRATING COMPLIANCE WITH THIS STANDARD. 20 C REQUIREMENTS FOR MAXIMUM SURFACE IMPERFE
14、CTION DEPTH AND RECOMMENDED MACHINING ALLOWANCES. 21 AS 14422007 4 Standards Australia www.standards.org.au STANDARDS AUSTRALIA Australian Standard Carbon steels and carbon-manganese steelsHot rolled bars and semi- finished products 1 SCOPE This Standard specifies requirements for carbon steels and
15、carbon-manganese steel rods, bars, blooms, billets and slabs, delivered in the as-rolled or normalized condition, for forging and for general engineering purposes. It specifies chemical composition requirements for all grades, and tensile strength requirements for grades required to meet mechanical
16、properties. The Standard permits the addition of boron and micro-alloying elements for the achievement of special properties. The Standard also specifies requirements for the maximum depth of surface imperfections and gives recommended machining allowances for bars of various sizes. NOTES: 1Advice a
17、nd recommendations on information to be supplied by the purchaser at the time of enquiry or order are contained in Appendix A. 2For guidance on a means for demonstrating compliance to the Standard refer to Appendix B. 2 REFERENCED DOCUMENTS The following documents are referred to in this Standard: A
18、S 1199 Sampling procedures for inspection by attributes 1199.0 Part 0: Introduction to the ISO 2859 attribute sampling system 1199.1 Part 1: Sampling schemes indexed by acceptance of quality limit (AQL) for lot-by-lot inspection 1391 Metallic materialsTensile testing at ambient temperatures 1733 Met
19、hods for determination of grain size in metals 2338 Preferred dimensions of wrought metal products 2706 Numerical valuesRounding and interpretation of limiting values AS/NZS 1050 Methods for the analysis of iron and steel 1050.1 Part 1: Sampling iron and steel for chemical analysis AS/NZS ISO 9001 Q
20、uality management systemRequirements 9004 Quality management systemGuidelines for performance improvements HB 18.28 Conformity assessmentGuidance on a third-party certification system for products ISO 2566 SteelConversion of elongation values 2566-1 Part 1 : Carbon and low alloy steels 5 AS 14422007
21、 www.standards.org.au Standards Australia 3 DEFINITIONS For the purpose of this Standard, the definitions below apply. 3.1 Bar A finished product of solid section which may have rectangular, square, round or hexagonal cross-section, defined as follows: (a)Flat bars (flats) Bars of rectangular cross-
22、section, 3 mm or greater in thickness and less than 600 mm in width, supplied in straight lengths or coils and having edges of controlled contour. (b)Hexagonal bars (hexagons) Bars of regular hexagonal cross-section supplied in straight lengths or coils. (c)Square bars (squares) Bars of square cross
23、-section supplied in straight lengths or coils. (d)Round bars (round) Bars of circular cross-section supplied in straight lengths or coils. 3.2 Billet A semi-finished forged, rolled or continuously-cast product intended for processing into finished products by further forging or rolling. The cross-s
24、ection is usually square or rectangular, with dimensions not greater than 165 mm 165 mm (or equivalent cross- sectional area), and the width-to-thickness ratio is less than 4:1. 3.3 Bloom A semi-finished forged, rolled or continuously-cast product intended for further rolling or forging. The cross-s
25、ection is square or rectangular, with dimensions greater than 165 mm 165 mm (or equivalent cross-sectional area), and the width-to-thickness ratio is less than 4:1. 3.4 Fully killed steel Steel deoxidized with a strong deoxidizing agent such as silicon or aluminium in order to reduce the oxygen cont
26、ent to prevent a reaction between carbon and oxygen during solidification. 3.5 Merchant quality steel Product having wider carbon and manganese ranges than those of specified carbon steels (see Table 1). It is not subject to product analysis tolerances, grain size requirements or modification with s
27、pecial additions. 3.6 Out-of-hexagon The greatest difference between the three dimensions measured at the same cross-section across opposite flats of the hexagon. 3.7 Out-of-round The difference between the maximum and minimum diameters of the bar, measured at the same cross-section. 3.8 Out-of-squa
28、re The difference between the two dimensions at the same cross-section across opposite flats of the square. 3.9 Primary rolled product Steel product produced in a primary mill by the direct hot-rolling of an ingot or from a continuously cast bloom. AS 14422007 6 Standards Australia www.standards.org
29、.au 3.10 Rod A semi-finished or finished product of approximately circular cross-section produced in coils. 3.11 Slab A semi-finished forged, rolled or continuously-cast product intended for rolling or forging. The cross-section is rectangular, with the thickness greater than 50 mm and the width-to-
30、 thickness ratio equal to or greater than 4:1. 3.12 Test batch Finished steel of the same size, produced from the same cast and from the same heat treatment batch. 3.13 Test sample A portion of material or product, or a group of items selected from a test batch by a sampling procedure. 3.14 Test spe
31、cimen A portion or a single item taken from the test sample for the purpose of applying a particular test. 4 DESIGNATION 4.1 General The steel designation shall comprise the number of this Australian Standard, i.e. AS 1442, followed by a slash and additional characters in accordance with Clauses 4.2
32、 and 4.3. Additional designations for surface condition and austenitic grain size are given in Clauses 4.4 and 4.5. 4.2 For steels supplied to chemical composition only The designation of steel supplied to a specified chemical composition shall be in accordance with the following: (a)A prefix letter
33、, if applicable, as follows: M: Merchant quality steel U: Unspecified deoxidation X: Major deviation in chemical composition of any grade from the corresponding AISI-SAE grade NOTE: Information on AISI-SAE grades is given in the relevant steel products manual of the American Iron and Steel Institute
34、. (b)A four-digit series designation, as follows, wherein the first two digits of the number indicate the type of steel and the last two digits indicate the approximate mean of the specified carbon range: 10XX: Plain carbon steels 11XX: Sulfurized free-cutting carbon steels 12XX: Phosphorized and su
35、lfurized free-cutting carbon steels 12XX: Carbon-manganese steels NOTE: The double X has no significance other than to indicate the position for digits to be added. (c)Modification symbols may be added to the series designation as follows: 7 AS 14422007 www.standards.org.au Standards Australia (i)Fo
36、r lead-bearing steels, the letter L is used to indicate that the steel contains lead and is placed between the second and third characters of the four-digit series designation. (ii)For aluminium-killed steels, the letter A is placed between the second and third characters of the four-digit series de
37、signation. (iii)For boron-treated steels, the letter B is placed between the second and third characters of the four-digit series designation. (iv)For micro-alloyed steels, the letter M is placed between the second and third characters of the four-digit series designation. Examples of designation: A
38、S 1442/12L14, AS 1442/10A08, AS 1442/10B22, AS 1442/10M40, AS 1442/X1038. 4.3 For steels supplied to chemical composition and mechanical properties The designation of steel supplied to chemical composition and mechanical properties shall consist of the following: (a)The prefix letter U, if applicabl
39、e (see Clause 4.2(a). (b)A number 1, 3, 4, 5, 6, 8, 9 or 10 to indicate the steel grade. Examples of designation: AS 1442/U5, AS 1442/5. 4.4 Surface condition The surface condition resulting from the mill is normally of commercial quality. Where a special condition is required, it is indicated by ei
40、ther of the following suffix letters: B: Intermediate surface condition suitable for cold drawn products, heat-treated products and forgings other than upset or drop-forged products. F: Surface condition suitable for upsetting, drop-forging and other severe forming applications. Example of designati
41、on: AS 1442/1040B. 4.5 Austenitic grain size The following designations consisting of suffix letters CG or FG indicate the austenitic grain size of the steel as defined in AS 1733: CG: Coarse FG: Fine Example of designation: AS 1442/1030FG. NOTE: The absence of these suffix letters indicates that th
42、e steel may be coarse-grained or fine-grained at the suppliers option. 5 MATERIALS 5.1 Chemical composition 5.1.1 General Chemical composition shall be determined by any procedures which are at least as accurate as those given in AS/NZS 1050.1. 5.1.2 Cast analysis Wherever possible, a chemical analy
43、sis of the steel from each cast shall be made to determine the proportions of the specified elements. In cases where it is impracticable to obtain samples from liquid steel, analysis on test samples taken in accordance with the requirements of AS 1199.1 may be reported as cast analysis. AS 14422007
44、8 Standards Australia www.standards.org.au The reported cast analysis of the steel shall conform to the limits given in Tables 1 to 5 for the appropriate grade. 5.1.3 Residual elements For steels complying with this Standard, residual elements are acceptable to the following limits: (a)Chromium: 0.3
45、0% maximum (b)Copper: 0.35% maximum (c)Molybdenum: 0.10% maximum (d)Nickel: 0.35% maximum NOTE: The amount of residual elements may affect subsequent processes, especially those involving cold working, welding and heat treatment. 5.1.4 Product analysis For grades of steel specified in Tables 1, 4 an
46、d 5, excluding those with unspecified deoxidation (U), with cross-sectional areas up to and including 0.06 m2, the results of individual determinations carried out on the product shall be within the product analysis tolerance limits specified in Table 6. Where several determinations of a single elem
47、ent, excluding lead, are carried out on products from any one cast, the spread of individual results shall not extend both above and below the range specified in Tables 1, 4 and 5. 5.1.5 Tensile test requirements When tested in accordance with Clause 8, steels requiring tensile testing shall meet th
48、e relevant requirements of Table 5. 6 FREEDOM FROM DEFECTS 6.1 General The steel shall be free from internal and surface defects which render it unsuitable for its particular application. If, after acceptance of the steel and provided that it has been properly treated after delivery, subsequent proc
49、essing reveals that it contains defects found to be detrimental, the steel shall be deemed not to comply with this Standard. 6.2 Freedom from surface imperfections The maximum permissible depth of surface imperfections from commercial, B and F surface conditions is specified in Appendix C. This Appendix also gives recommendations for machining allowances. 7 SURFACE DRESSING 7.1 Bars Surface defects may be removed from bars by grinding, chipping or by other means, provided that the final