1、 ISO 2012 Structural steels Part 3: Technical delivery conditions for fine- grain structural steels Aciers de construction Partie 3: Conditions techniques de livraison pour aciers de construction grains fins INTERNATIONAL STANDARD ISO 630-3 First edition 2012-06-01 Reference number ISO 630-3:2012(E)
2、 ISO 630-3:2012(E) ii ISO 2012 All rights reserved COPYRIGHT PROTECTED DOCUMENT ISO 2012 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without per
3、mission in writing from either ISO at the address below or ISOs member body in the country of the requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ISO 630-3:2012(E) ISO 2012
4、 All rights reserved iii Contents Page Foreword iv 1 Scope 1 2 Normative references . 1 3 Terms and definitions . 1 4 Classification and designation 2 4.1 Classification 2 4.2 Grades and qualities . 2 4.3 Normative annexes . 2 5 Information to be supplied by purchaser . 2 5.1 Mandatory information .
5、 2 5.2 Options . 3 6 Requirements . 3 6.1 Steelmaking process 3 6.2 Delivery condition . 3 6.3 Chemical composition . 3 6.4 Mechanical properties 3 6.5 Surface conditions 4 6.6 Internal soundness . 4 6.7 Dimensions and tolerances on dimensions, shape and mass . 4 7 Inspection 4 8 Sampling Frequency
6、of testing 4 8.1 Verification 4 8.2 Test units . 4 9 Test methods 4 10 Marking . 4 Annex A (normative) Steel grades S275, S355, S420 and S460: Chemical composition and mechanical properties . 5 Annex B (normative) Steel grades SG245, SG290, SG325, SG345, SG365, SG415 and SG460: Chemical composition
7、and mechanical properties .15 Bibliography .17 ISO 630-3:2012(E) Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical c
8、ommittees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with t
9、he International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft Internat
10、ional Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be
11、 the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 630-3 was prepared by Technical Committee ISO/TC 17, Steel, Subcommittee SC 3, Steels for structural purposes. This first edition cancels and replaces ISO 630:1995, which has been tech
12、nically revised. It incorpoates ISO 630:1995/Amd 1:2003. ISO 630 consists of the following parts, under the general title Structural steels: Part 1: General technical delivery conditions for hot-rolled products Part 2: Technical delivery conditions for structural steels for general purposes Part 3:
13、Technical delivery conditions for fine-grain structural steels Part 4: Technical delivery conditions for high-yield-strength quenched and tempered structural steel plates The following parts are under preparation: Part 5: Technical delivery conditions for structural steels with improved atmospheric
14、corrosion resistance Part 6: Technical delivery conditions for seismic improved structural steels for building iv ISO 2012 All rights reserved INTERNATIONAL STANDARD ISO 630-3:2012(E) Structural steels Part 3: Technical delivery conditions for fine-grain structural steels 1 Scope This part of ISO 63
15、0 specifies requirements for flat and long products of hot-rolled weldable fine-grain structural steels in the as-rolled (for SG grades only), normalized/normalized-rolled and thermomechanical-rolled delivery conditions. It applies to steel plates rolled on a reversing mill, wide flats, hot-rolled s
16、ections and bars, which are intended for use in heavily loaded parts of welded or bolted structures. This part of ISO 630 covers 11 grades and four qualities. Grades S275, S355, S420 and S460 are covered in Annex A. Grades SG245, SG290, SG325, SG345, SG365, SG415 and SG460 are covered in Annex B. No
17、t all grades are available in all qualities, and some qualities have Charpy V-notch requirements. This part of ISO 630 does not include the following structural steels, some of which are covered by other International Standards: Sheet and strip refer to ISO TC 17/SC 12, Continuous mill flat rolled p
18、roducts; Tubular products refer to ISO TC 5/SC 1, Steel tubes. NOTE Lists of standards covered by ISO/TC 17/SC 12 and ISO/TC 5/SC 1 are available on the ISO Web site. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated reference
19、s, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 630-1, Structural steels Part 1: General technical delivery conditions for hot-rolled products ISO 643, Steels Micrographic determination of the apparent g
20、rain size 3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 630-1 and the following apply. 3.1 as-rolled steel without any special rolling and/or heat treatment condition 3.2 normalized-rolled steel rolled with a process in which the final deformation
21、is carried out in a certain temperature range leading to a material condition equivalent to that obtained after normalizing so that the specified values of the mechanical properties are retained after normalizing NOTE In international publications for both normalized rolling, as well as thermomechan
22、ical rolling, the expression “controlled rolling” may be found. ISO 2012 All rights reserved 1 ISO 630-3:2012(E) 3.3 normalized steel produced by heating to a suitable temperature above the transformation range and then cooling in air to a temperature substantially below the transformation range 3.4
23、 thermomechanical processed steel rolled with a process in which the final deformation is carried out in a certain temperature range leading to a material condition with certain properties which cannot be achieved or repeated by heat treatment alone NOTE 1 Hot forming or post-weld heat treatment abo
24、ve 580 C may lower the strength values and should not be performed. Flame straightening can be applied in accordance with relevant technical recommendations. NOTE 2 Thermomechanical rolling can include processes with an increasing cooling rate with or without tempering, including self-tempering, but
25、 excluding direct quenching and quenching and tempering. NOTE 3 In some publications, the term “thermomechanical control process” is also used. 3.5 fine grain steel with fine-grain structure with an equivalent index of ferritic grain size 6 (see 6.1) NOTE For the determination of grain sizes see ISO
26、 643. 4 Classification and designation 4.1 Classification The steel grades specified in this part of ISO 630 shall be classified as non-alloy quality or alloy special steels. 4.2 Grades and qualities This International Standard specifies 11 steel grades. Grades S275, S355, S420 and S460 are covered
27、in Annex A. Grades SG245, SG290, SG325, SG345, SG365, SG415 and SG460 are covered in Annex B. Each grade is available in up to four qualities. These grades and qualities differ in their specified mechanical properties and impact energy requirements. All S grades require impact testing. SG grades req
28、uire impact testing upon agreement at the time of ordering. Quality A: no impact testing Quality C: impact testing at 0 C Quality D: impact testing at -20 C Quality E: impact testing at -50 C 4.3 Normative annexes The requirements of Annex A or Annex B are to be regarded separately. Each annex is in
29、dependent of the other without combining in any way. 5 Information to be supplied by purchaser 5.1 Mandatory information The information that shall be supplied by the purchaser at the time of the order is specified in ISO 630-1. 2 ISO 2012 All rights reserved ISO 630-3:2012(E) 5.2 Options The option
30、s of ISO 630-1 apply. In addition, the following options apply to products according to this part of ISO 630. If the purchaser does not indicate a wish to implement any of these options at the time of the order, the products shall be supplied in accordance with the basic specification (see 5.1): a)
31、required delivery condition; b) testing of impact properties in transverse direction using Charpy V-notch test pieces in accordance with ISO 630-1. 6 Requirements See ISO 630-1. 6.1 Steelmaking process See ISO 630-1. If a special steelmaking process has been specified, this shall be reported in the
32、inspection document. The steels shall have a fine-grain practice containing sufficient amounts of nitrogen-binding elements. 6.2 Delivery condition The products covered by this part of ISO 630 are delivered in the as-rolled (for SG grades only), normalized- rolled, normalized, or thermomechanical pr
33、ocessed condition. The delivery condition shall be indicated in the inspection document. 6.3 Chemical composition 6.3.1 Heat analysis The chemical composition determined by heat analysis shall comply with the specified values in Tables A.1 and A.2 in Annex A or Table B.1. 6.3.2 Product analysis The
34、product analysis of grades S275, S355, S420, and S460 shall comply with the values given in Tables A.3 and A.4. The permitted deviation of product analysis of grades SG290, SG325, SG345, SG365, SG415 and SG460 shall comply with the values given in Table B.2. 6.3.3 Carbon equivalent value The carbon
35、equivalent value (CEV) requirements for Annex A grades are given in Tables A.5 and A.6, and for Annex B grades are given in Table B.3. For determining the CEV, the following International Institute for Welding (IIW) formula shall be used: CEV = C + Mn/6 + (Cr + Mo + V)/5 + (Ni + Cu)/15 6.4 Mechanica
36、l properties 6.4.1 Tensile properties The tensile properties at room temperature shall comply with the values specified in Tables A.7 and A.8 or Table B.4. ISO 2012 All rights reserved 3 ISO 630-3:2012(E) 6.4.2 Charpy V-notch impact tests The impact properties of Charpy V-notch test pieces shall com
37、ply with the values specified in Tables A.9, A.10, A.11 and A.12 or Table B.5. The orientation of the specimens shall be longitudinal unless a transverse orientation is agreed between the purchaser and manufacturer (see 5.2 and ISO 630-1). 6.5 Surface conditions See ISO 630-1. 6.6 Internal soundness
38、 See ISO 630-1. 6.7 Dimensions and tolerances on dimensions, shape and mass See ISO 630-1. 7 Inspection Specific inspection is required for all grades. Refer to 7.1 in ISO 630-1:2011. 8 Sampling Frequency of testing 8.1 Verification The verification of mechanical properties shall be by heat. Verific
39、ation by lot shall be by agreement between the producer and purchaser. 8.2 Test units 8.2.1 Annex A The test unit shall contain products of the same form, grade, quality, and delivery condition, and of the same thickness range as specified in Table A.7 for the yield strength and shall be, by heat: 4
40、0 tons or part thereof; 60 tons or part thereof for heavy sections with a mass 100 kg/m; 80 tons or part thereof for heavy sections with a mass 200 kg/m; 80 tons or part thereof for all sections if the mass of the cast exceeds 200 tons. By agreement at the time of ordering, two tests by heat may be
41、used. 8.2.2 Annex B The test unit shall contain products of the same form, grade, quality, and delivery condition, and of the same thickness range as specified in Table B.4 for the yield strength and shall be 50 tons or part thereof. By agreement at the time of ordering, two tests by heat may be use
42、d. 9 Test methods See ISO 630-1. 10 Marking See ISO 630-1. 4 ISO 2012 All rights reserved ISO 630-3:2012(E) Annex A (normative) Steel grades S275, S355, S420 and S460: Chemical composition and mechanical properties ISO 2012 All rights reserved 5 ISO 630-3:2012(E) Table A.1 Chemical composition of th
43、e heat analysis for normalized or normalized-rolled steel Designation Quality C % max. Si % max. Mn % P % max. a S % max. ab Nb % max. V % max. Al total % min. c Ti % max. Cr % max. Ni % max. Mo % max. Cu % max. d N % max. S275N D 0,18 0,40 0,501,50 0,030 0,025 0,05 0,05 0,02 0,05 0,30 0,30 0,10 0,5
44、5 0,015 E 0,16 0,025 0,020 S355N D 0,20 0,50 0,901,65 0,030 0,025 0,05 0,12 0,02 0,05 0,30 0,50 0,10 0,55 0,015 E 0,18 0,025 0,020 S420N D 0,20 0,60 1,001,70 0,030 0,025 0,05 0,20 0,02 0,05 0,30 0,80 0,10 0,55 0,025 E 0,025 0,020 S460Ne D 0,20 0,60 1,001,70 0,030 0,025 0,05 0,20 0,02 0,05 0,30 0,80
45、0,10 0,55 0,025 E 0,025 0,020 aFor long products, the P and S content can be 0,005 % higher. bFor some applications, e.g. railways, a maximum S content of 0,010 % may be agreed at the time of the order. cIf sufficient other N-binding elements are present, the minimum total Al content does not apply.
46、 dCu content above 0,40 % may cause hot shortness during hot forming. eV + Nb + Ti 0,22 % and Mo + Cr 0,30 %. 6 ISO 2012 All rights reserved ISO 630-3:2012(E) Table A.2 Chemical composition of the heat analysis for thermomechanical processed steel Designation Quality C % max. Si % max. Mn % max. P %
47、 max. a S % max. ab Nb % max. V % max. Al total % min. c Ti % max. Cr % max. Ni % max. Mo % max. Cu % max. d N % max. S275M D, E 0,13e 0,50 1,50 0,030 0,025 0,05 0,08 0,02 0,05 0,30 0,30 0,10 0,55 0,015 0,025 0,020 S355M D, E 0,14e 0,50 1,60 0,030 0,025 0,05 0,10 0,02 0,05 0,30 0,50 0,10 0,55 0,015
48、0,025 0,020 S420M D, E 0,16f 0,50 1,70 0,030 0,025 0,05 0,12 0,02 0,05 0,30 0,80 0,20 0,55 0,025 0,025 0,020 S460M D, E 0,16f 0,60 1,70 0,030 0,025 0,05 0,12 0,02 0,05 0,30 0,80 0,20 0,55 0,025 0,025 0,020 aFor long products, the P and S content can be 0,005 % higher. bFor some applications, e.g. ra
49、ilways, a maximum S content of 0,010 % may be agreed at the time of the order. cIf sufficient other N-binding elements are present, the minimum total Al content does not apply. dCu content above 0,40 % may cause hot shortness during hot forming. eFor long products, a maximum C content of 0,15 % for grade S275 and a maximum C content of 0,16 % for grade S355 applies. fFor long products of the grades S420 and S460, a maximum C content of 0,18 % applies. ISO 2012 All rights reserved 7 ISO
