ISO 4950-2 AMD 1-2003 高屈服强度扁钢材.第2部分 修改件1

INTERNATIONAL STANDARD IS0 4950-2 Second edition AMENDMENT 1 1995-08-1 5 2003-1 2-01 High yield strength flat steel products - Part 2: Products supplied in the normalized or controlled rolled condition AMENDMENT 1 Produits plats en acier à haute limite d'élasticité - Partie 2: Produits livrés à l'état normalisé ou de laminage contrôlé AMENDEMENT 1 Reference number IS0 4950-2:1995/Amd.l:2003(E) @ IS0 2003 IS0 4950-2: 1995/Amd.l:2003( E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In downloading this file, parties accept therein the responsibility of not infringing Adobe's licensing policy. The IS0 Central Secretariat accepts no liability in this area. Adobe is a trademark of Adobe Systems Incorporated. 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IS0 copyright office Case postale 56 CH-I211 Geneva 20 Tel. + 41 22 749 O1 11 Fax +41 227490947 E-mail copyright@iso.org Web www.iso.org Published in Switzerland ii O IS0 2003 -All rights reserved IS0 4950-2:1995/Amd.l:2003(E) Foreword IS0 (the International Organization for Standardization) is a worldwide federation of national standards bodies (IS0 member bodies). The work of preparing International Standards is normally carried out through IS0 technical committees. 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. IS0 collaborates closely with the International Electrotechnical Commission (I EC) 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 International 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 the subject of patent rights. IS0 shall not be held responsible for identifying any or all such patent rights. Amendment 1 to IS0 4950-2:1995 was prepared by Technical Committee ISOíTC 17, Steel, Subcommittee SC 3, Steels for structural purposes. O IS0 2003 -All rights reserved iii IS0 4950-2: 1995/Amd.l:2003( E) Introduction It appeared during the systematic review, that strip and coils should be deleted from the scope of this International Standard because they are relevant to ISO/TC 17/SC 12, consequently ISO/TC 17/SC 3 decided to prepare an amendment to correct this International Standard accordingly. iv O IS0 2003 -All rights reserved IS0 4950-2:1995/Amd.l:2003(E) High yield strength flat steel products - Part 2: Products supplied in the normalized or controlled rolled condition AMENDMENT 1 Cover page and page 1, fifie Modify the title of IS0 4950-2:1995 as follows: ?High yield strength steel plates and wide flats - Part 2: plates and wide flats supplied in the normalized or controlled rolled condition? Page 1, Clause 1 1 st paragraph, 3rd line, replace ? I . . . flat steel products . . .? by ? I . . . steel plates and wide flats . . .?. 2nd paragraph, replace the text with the following: ?It applies to steel plates hot-rolled on reversing mills and hot-rolled wide flats in the thickness range 3 mm to 150 mm, in steels supplied after normalized or controlled rolling, having a minimum specified yield strength of 355 N/mm2 to 460 N/mm2 for thicknesses up to and including 16 mm.? Page 3, Table 3 Delete footnote 2) and renumber footnotes 3) and 4) as 2) and 3) respectively. Page 4, Annex A 2nd paragraph, delete ?and strip?. O IS0 2003 -All rights reserved 1 IS0 4950-2: 1995/Amd.l:2003( E) ICs 77.140.50 Price based on 1 page O IS0 2003 -All rights reserved ~ 9 4853903 Ob25580 T78 = INTERNATIONAL STANDARD IS0 4950-2 Second edition 1995-08-1 5 High yield strength flat steel products - Part 2: Products supplied in the normalized or controlled rolled condition Produits plats en acier à haute limite d'élasticité Part 2: Produits livrés à l'état normalisé ou de laminage contrôlé Reference number IS0 4950-2:1995(E) 4853903 06255BL 904 IS0 4950-21995(E) Foreword IS0 (the International Organization for Standardization) is a worldwide federation of national standards bodies ( IS0 member bodies). The work of preparing International Standards is normally carried out through IS0 technical committees. 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. IS0 collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Draft International 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. International Standard I S 0 4950-2 was prepared by Technical Committee ISO/TC 17, Steel, Subcommittee SC 3 , Steels for structural purposes. This second edition cancels and replaces the first edition (IS0 4950-2: 1981 1, which has been technically revised. I S 0 4950 consists of the following parts, under the general title High yield strength flat steel products: - Part I: General requirements - Part2: Products supplied in the normalized or controlled rolled condition - Part 3: Products supplied in the heat-treated (quenched + tempered) condition Annex A of this part of IS0 4950 is for information only. O I S 0 1995 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 permission in writing from the publisher. International Organization for Standardization Case postale 56 CH-1 21 1 Genève 20 Switzerland Printed in Switzerland II 4851903 Ob25582 840 INTERNATIONAL STANDARD o I S 0 IS0 4!350-2:1995(E) High yield strength flat steel products - Part 2: Products supplied in the normalized or controlled rolled condition 1 Scope This part of I S 0 4950 specifies the chemical com- position and the mechanical properties of high yield strength flat steel products supplied in the normalized or/equivalent condition. For the method of manu- facture, acceptance conditions and marking of these products, see I S 0 4950-1. It applies to hot-rolled plates, wide strip in coils of width greater than or equal to 600 mm, and wide flats in the thickness range 3 mm to 150 mm, in steels supplied after normalizing or controlled rolling, having a minimum specified yield strength of 355 N/mm2 to 460 N/mm2 for thicknesses up to and including 16 mm. This part of I S 0 4950 does not apply to products covered by other standards, such as - flat products from continuous mills (see I S 0 49961, - flat products for subsequent forming operations (see I S 0 59511, - plates for pressure vessels (see I S 0 9328-4). 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this part of IS0 4950. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this part of IS04950 are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC and I S 0 maintain registers of currently valid International Standards. I S 0 4950-1 : 1995, High yield strength flat steel products - Part 1: General requirements. I S 0 4996:1991, Hot-rolled steel sheet of high yield stress structural quality. I S 0 5951 : I 993, Hot-rolled steel sheet of higher yield strength with improved formability. I S 0 9328-4:1991, Steel plates and strip for pressure purposes - Technical delivery conditions - Part 4: Weldable fine grain steels with high proof stress supplied in the normalized or quenched and tempered condition. 3 Manufacture 3.1 Deoxidation process All steels shall be from casts with added elements that are capable of producing a fine grain. In addition, steels of quality DD shall be supplied as non-rimming steel, while steels of quality E shall be supplied as f u I ly killed steel. 3.2 Delivery condition The products shall be delivered in the normalized or normalized and tempered condition or, unless other- wise agreed at the time of ordering, in an equivalent condition obtained by controlled rolling’). 1) Plates produced by controlled rolling may be subject to deterioration of their properties if they are subsequently hot formed. 1 IS0 4950-2:1995(E) Grade E355 E460 4853903 Ob25583 787 Chemical composition I% (m/m)I1) Quality C Mn2) Si P S Nb3) V3) AI (total)3) Ti3) Cr Ni Mo Cu4) max. max. max. max. min. max. max. max. max. DD 0.18 0.9 to 1,6 0.50 0,030 0,030 0,015 toO,O60 0.02to0.10 0,020 0,02 to0.20 0.25 0.30 0.10 0.35 E 0,18 0,9to1.6 0.50 0,025 0,025 0,015to0.060 0.02to0.10 0,020 0.02to0.20 0.25 0,30 0,lO 0.35 cc 0.20 1.Oto1.7 0.50 0,040 0,040 O,015toO,O60 0,02to0,20 0,020 0.02to0.20 0,70 1,0 0.40 0.70 DD 0.20 1,Oto1,7 0,50 0.030 0,030 O,015toO,O60 0.02to0.20 0,020 0,02to0,20 0.70 1.0 0,40 0.70 E 0.20 1.Oto1.7 0.50 0,025 0,025 0,015to0.060 0.02to0.20 0,020 0.02to0.20 0.70 1.0 0.40 0.70 Q I S 0 Table 1 - Chemical composition (ladle analysis) 4 General requirements 4.1 Chemical composition 4.1.1 Ladle analysis Table 1 gives the chemical composition limits for the ladle analysis. All elements other than those mentioned in table 1 and added intentionally shall be indicated to the purchaser. 4.1.2 Product analysis A product analysis may be required by the purchaser; in this case, it shall be specified when ordering. Table 2 gives the permitted deviations for the product analysis relative to the values for ladle analysis given in table 1. 4.2 Mechanical properties The steels in the normalized and tempered or controlled rolled conditions, shall comply with the mechanical properties specified in table 3 when they are determined on test pieces prepared in accordance with the requirements of 5.3 of IS0 4950-1 :I 995. 4.3 Weldability A maximum value of the carbon equivalent (Ceq), expressed as a percentage by mass, based on the International Institute of Welding (IIW) formula, Le.: Mn Cr+Mo+V Ni+Cu 6 5 15 Ceq = C+-+ +- may be agreed on ordering (where C, Mn, Cr, Mo, V, Ni and Cu are the contents, expressed as percentage by mass, of the respective elements). Table 2 - Permissible deviations for the product analysis relative to the specified ladle analysis Values in percentage by mass Element C Mn si P and S Nb V Ti Cr Ni Mo Cu Specified limits s 0,20 =Z 1,70 d 0,50 0,040 =S 0,060 s 0.20 s 0,20 4 0,70 < l , o < 0,40 d 0,35 > 0,35 Permissible deviation’) -I- 0,02 f 0,lO + 0,05 + 0,005 f 0,005 + 0.02 - 0.01 + 0.02 - 0,Ol + 0,05 + 0,05 + 0,05 + 0,05 + 0.07 1) The deviations apply either above or below the specified limits of the range, but not simultaneously. 2 4851903 0625584 613 U o IS0 IS0 4950-2: 1995( E) 3 IS0 4950-2:1995(E) Direction of test piece Minimum impact energy (JI at temperatures Quality of steel taken - 5 0 ° C - 4 0 ° C - 3 0 ° C - 2 0 ° C - 1 0 ° C 0°C +1O"C + 2 0 " C Longitudinal 39 43 47 51 55 Transverse 21 24 31 31 31 Longitudinal 27 31 39 47 51 55 59 63 Transverse 16 20 24 27 31 31 35 39 DD E ? rn 4851903 Ob25585 55T rn o IS0 Annex A ( i n f or ma t ive) Minimum values of impact energy Kv The values given in table A. l . apply to qualities DD and E (regardless of grade). Unless otherwise agreed, the impact energy values shall be tested at For plates and strip, the values in the longitudinal and transverse directions apply. For wide flats, only the longitudinal direction values apply unless otherwise agreed at the time of enquiry and order. - 20 O C for steel of quality DD, - 50 "C for steel of quality E. Table A.1 - Minimum values of impact energy for products of thickness 10 mm e 150 mm 4 IS0 4950-2:1995(€) W 4851703 Ob25586 496 ICs 77.140.50 Descriptors: iron and steel products, structural steels, high yield strength steels, hot-rolled products, metal plates, wide strips, wide flats, specifications, mechanical properties, chemical composition, grades (quality), delivery condition. Price based on 4 pages