1、 ISO 2012 Structural steels Part 4: Technical delivery conditions for high- yield-strength quenched and tempered structural steel plates Aciers de construction Partie 4: Conditions techniques de livraison pour tles en acier de construction tremp et revenu haute limite dlasticit INTERNATIONAL STANDAR
2、D ISO 630-4 First edition 2012-06-01 Reference number ISO 630-4:2012(E) ISO 630-4:2012(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, elec
3、tronic or mechanical, including photocopying and microfilm, without permission 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.
4、org Web www.iso.org Published in Switzerland ISO 630-4:2012(E) ISO 2012 All rights reserved iii Contents Page Foreword iv 1 Scope 1 2 Normative references . 1 3 T erms and definitions . 1 4 Classification and designation 2 4.1 Classification 2 4.2 Grades and qualities . 2 4.3 Normative annexes . 2 5
5、 Information to be supplied by purchaser . 2 5.1 Mandatory information . 2 5.2 Options . 2 6 Requirements . 3 6.1 Steelmaking process 3 6.2 Deoxidation . 3 6.3 Delivery condition . 3 6.4 Chemical composition . 3 6.5 Mechanical properties 3 6.6 Surface conditions 4 6.7 Internal soundness . 4 6.8 Dime
6、nsions and tolerances on dimensions, shape and mass . 4 7 Inspection 4 8 Sampling Frequency of testing 4 8.1 V erification 4 8.2 Test units . 4 9 Test methods 4 10 Marking . 4 Annex A (normative) Steel grades S460Q, S500Q, S550Q, S620Q, S690Q, S890Q and S960Q: Chemical composition and mechanical pro
7、perties . 5 Annex B (normative) Steel grades SG460Q, SG500Q, and SG700Q: Chemical composition and mechanical properties . 11 Bibliography .15 ISO 630-4:2012(E) Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies)
8、. The work of preparing International Standards is normally carried out through ISO 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
9、-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the 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
10、 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
11、a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 630-4 was prepared by Technical Committee ISO/TC 17, Steel, Subcommittee SC 3, Steels for
12、 structural purposes. This first edition cancels and replaces ISO 630:1995, which has been technically 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 pro
13、ducts Part 2: Technical delivery conditions for structural steels for general purposes Part 3: 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 prep
14、aration: Part 5: Technical delivery conditions for structural steels with improved atmospheric corrosion resistance Part 6: Technical delivery conditions for seismic improved structural steels for building iv ISO 2012 All rights reserved INTERNATIONAL STANDARD ISO 630-4:2012(E) Structural steels Par
15、t 4: Technical delivery conditions for high-yield-strength quenched and tempered structural steel plates 1 Scope This part of ISO 630 specifies qualities for high-yield-strength quenched and tempered structural steels. This part of ISO 630 applies to steel plates rolled on a reversing mill which are
16、 used in the quenched and tempered condition and normally intended for welded or bolted structures. 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
17、 products; 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. This part of ISO 630 covers 10 grades. Grades S460Q, S500Q, S550Q, S620Q, S690Q, S890Q and S960Q are covered in Annex A. Grades SG4
18、60Q, SG500Q, and SG700Q are covered in Annex B. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any
19、 amendments) applies. ISO 6301, Structural steels Part 1: General technical delivery conditions for hot-rolled products ISO 643, Steels Micrographic determination of the apparent grain size 3 T erms and definitio ns For the purposes of this document, the terms and definitions given in ISO 630-1 and
20、the following apply. 3.1 quenching operation which consists of cooling a ferrous product more rapidly than in still air from a high temperature above Ac 1 NOTE Ac 1is the temperature at which austenite begins to form during heating. 3.2 tempering heat treatment applying to a ferrous product, general
21、ly after quench hardening, or another heat treatment to bring the properties to the required level, and consisting of heating to specific temperatures ( Ac 1 ) and soaking for an appropriate duration, followed by cooling at an appropriate rate NOTE Additionally, the following may apply: processes of
22、 direct quenching plus tempering. ISO 2012 All rights reserved 1 ISO 630-4:2012(E) 3.3 fin e - g r ain steel steel with fine-grain structure with an equivalent index of ferritic grain size 6 determined in accordance with ISO 643 See 6.1. 4 Classification and d esignation 4.1 Classification The steel
23、 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 document specifies 10 grades. Grades S460Q, S500Q, S550Q, S620Q, S690Q, S890Q and S960Q are covered in Annex A. Grades SG460Q, SG500Q, and SG700Q are covered in A
24、nnex B. Each grade is available in up to five qualities. These grades and qualities differ in their specified mechanical properties and impact energy requirements. Quality A: no impact test Quality C: impact testing at 0 C Quality D: impact testing at -20 C Quality E: impact testing at -40C Quality
25、F: impact testing at -60C 4.3 Normative annexes The requirements of Annex A or Annex B are to be regarded separately. Each annex is independent 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
26、 purchaser at the time of the order is specified in ISO 630-1. 5.2 Options The options of ISO 630-1 apply (see ISO 630-1). 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 o
27、f the order, the products shall be supplied in accordance with the basic specification (see 5.1). a) Testing of impact properties in the transverse direction using Charpy V-notch test pieces in accordance with ISO 630-1. b) Testing of tensile and impact properties at a frequency per each plate as he
28、at-treated. c) On special request of the purchaser, the manufacturer shall inform the purchaser at the time of the order which of the alloying elements appropriate to the steel grade required will be deliberately added to the material to be delivered and reported in the heat analysis. d) On special
29、request of the purchaser, the manufacturer shall inform the purchaser at the time of the order which of the alloying elements appropriate to the steel grade required will be deliberately added to the 2 ISO 2012 All rights reserved ISO 630-4:2012(E) material to be delivered and reported in the produc
30、t analysis. The product analysis shall be carried out at an agreed frequency when specified at the time of the order. 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 inspection document. The steel
31、s shall have a fine-grain practice containing sufficient amounts of nitrogen-binding elements. 6.2 Deoxidation The steels specified in this specification shall be fully killed. 6.3 Delivery condition The products covered by this part of ISO 630 are delivered in the quenched and tempered condition. T
32、he delivery condition is indicated in the inspection document. 6.4 Chemical composition 6.4.1 Heat analysis The chemical composition determined by heat analysis shall comply with the specified values in Table A.1 or Table B.1. 6.4.2 Product analysis The product analysis of grades S460Q, S500Q, S550Q
33、, S620Q, S690Q, S890Q and S960Q shall comply with the values given in Table A.2. The permitted deviations on analysis of grades SG460Q, SG500Q, and SG700Q, relative to the values for heat analysis, are given in Table B.2. 6.4.3 Carbon equivalent values The carbon equivalent value (CEV) requirements
34、for Annex A grades are given in Table A.3 and for Annex B grades 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 6.5 Mechanical properties 6.5.1 Tensile properties The tensile proper
35、ties at ambient temperature shall comply with the values specified in Table A.4 or Table B.4. ISO 2012 All rights reserved 3 ISO 630-4:2012(E) 6.5.2 Charpy V-notch impact tests The impact properties of Charpy V-notch test pieces shall comply with the values specified in Table A.5 or Table B.5. The o
36、rientation of the specimens shall be longitudinal, unless a transverse orientation is agreed between the purchaser and manufacturer (see 5.2, ISO 630-1, and the values in Table A.6). 6.6 Surface conditions See ISO 630-1. 6.7 Internal soundness See ISO 630-1. 6.8 Dimensions and tolerances on dimensio
37、ns, shape and mass See ISO 630-1. 7 Inspection Specific inspection shall be required for all grades. 8 Sampling Frequency of testing 8.1 V erification The verification of mechanical properties shall be by heat. 8.2 Test units 8.2.1 Annex A The test unit shall contain products of the same form, grade
38、, quality, and delivery condition, and of the same thickness range as specified in Table A.4 for the yield strength and shall be taken by heat: 40 tons or part thereof. 8.2.2 Annex B The test unit shall be taken on each plate as heat treated. 9 Test methods See ISO 630-1. 10 Marking See ISO 630-1. 4
39、 ISO 2012 All rights reserved ISO 630-4:2012(E) Annex A (normative) Steel grades S460Q, S500Q, S550Q, S620Q, S690Q, S890Q and S960Q: Chemical composition and mechanical properties ISO 2012 All rights reserved 5 ISO 630-4:2012(E) Table A.1 Chemical composition (heat analysis)a Grade Quality C % max.
40、Si % max. Mn % max. P % max. S % max. N % max. B % max. Cr % max. Cu % max. Mo % max. Nb % max. b Ni % max. Ti % max. b V % max. b Zr % max. b All grades D E, F 0,20 0,80 1,70 0,025 0,020 0,015 0,010 0,015 0,005 0 1,50 0,50 0,70 0,06 2,0 0,05 0,12 0,15 aDepending on the thickness of the product and
41、the manufacturing conditions, the manufacturer may add to the steel one or several alloying elements up to the maximum values given in order to obtain the specified properties (see 6.4.1). bThere shall be at least 0,015 % of a grain-refining element present. Aluminium is also one of these elements.
42、The minimum content of 0,015 % applies to soluble aluminium, this value is regarded as attained if the total aluminium content is at least 0,018 %; in case of dispute, the soluble aluminium content shall be determined. 6 ISO 2012 All rights reserved ISO 630-4:2012(E) Table A.2 Chemical composition (
43、product analysis) based on Table A.1a Grade Quality C % max. Si % max. Mn % max. P % max. S % max. N % max. B % max. Cr % max. Cu % max. Mo % max. Nb % max. b Ni % max. Ti % max. b V % max. b Zr % max. b All grades D E, F 0,22 0,86 1,80 0,030 0,025 0,017 0,012 0,016 0,006 0 1,60 0,55 0,74 0,07 2,1 0
44、,07 0,14 0,17 aDepending on the thickness of the product and the manufacturing conditions, the manufacturer may add to the steel one or several alloying elements up to the maximum values given in order to obtain the specified properties (see 6.4.2). bThere shall be at least 0,010 % of a grain-refini
45、ng element present. Aluminium is also one of these elements. The minimum content of 0,010 % applies to soluble aluminium, this value is regarded as attained if the total aluminium content is at least 0,013 %; in case of dispute, the soluble aluminium content shall be determined. ISO 2012 All rights
46、reserved 7 ISO 630-4:2012(E) Table A.3 Maximum CEV based on the heat analysis Designation Maximum CEV in % for nominal product thickness in mm Grade Quality 50 50 100 100 150 S460Q D, E, F 0,47 0,48 0,50 S500Q D, E, F 0,47 0,70 0,70 S550Q D, E, F 0,65 0,77 0,83 S620Q D, E, F 0,65 0,77 0,83 S690Q D,
47、E, F 0,65 0,77 0,83 S890Q D, E, F 0,72 0,82 S960Q D, E 0,82 Table A.4 Tensile properties at room temperature Designation Minimum yield strength R eHac MPab Tensile strength R ma MPab Minimum elongation after fracture % Nominal thickness mm Nominal thickness mm L 0= 5,65S 0 Grade Quality 3 50 50 100
48、100 150 3 50 50 100 100 150 S460Q D, E, F 460 440 400 550 to 720 500 to 670 17 S500Q D, E, F 500 480 440 590 to 770 540 to 720 17 S550Q D, E, F 550 530 490 640 to 820 590 to 770 16 S620Q D, E, F 620 580 560 700 to 890 650 to 830 15 S690Q D, E, F 690 650 630 770 to 940 760 to 930 710 to 900 14 S890Q
49、D, E, F 890 830 940 to 1 100 880 to 1 100 11 S960Q D, E 960 980 to 1 150 10 aFor plate and wide flats with widths 600 mm, the direction transverse to the rolling direction applies. For all other products, the values apply for the direction parallel to the rolling direction. b1 MPa = 1 N/mm 2 . cIf R eHis not pronounced, refer to ISO 630-1:2011, 9.2. 8 ISO 2012 All rights reserved ISO 630-4:2012(E) Table A.5 Minimum values of impact energy for impact tests
