1、 ISO 2014 Structural steels Part 6: Technical delivery conditions for seismic-improved structural steels for building Aciers de construction Partie 6: Conditions techniques de livraison pour aciers de construction amliors sismiques pour btiment INTERNATIONAL STANDARD ISO 630-6 First edition 2014-09-
2、15 Reference number ISO 630-6:2014(E) ISO 630-6:2014(E)ii ISO 2014 All rights reserved COPYRIGHT PROTECTED DOCUMENT ISO 2014 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, inc
3、luding photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested 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 +
4、41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ISO 630-6:2014(E) ISO 2014 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 Q
5、ualities 2 5 Information to be supplied by purchaser . 2 5.1 Mandatory information . 2 5.2 Options . 2 6 Requirements 3 6.1 Steel-making process . 3 6.2 Delivery condition 3 6.3 Chemical composition 3 6.4 Mechanical properties 6 6.5 Surface conditions 7 6.6 Internal soundness 7 6.7 Dimensions and to
6、lerances on dimensions, shape, and mass 7 7 Inspection 8 8 Sampling Frequency of testing . 8 8.1 Verification . 8 8.2 Test units 8 9 Test Methods . 9 10 Marking 9 Annex A (normative) Shapes and dimensions tolerances of H-sections 10 Annex B (normative) The formula of carbon equivalent and the maximu
7、m carbon- equivalent value .14 Bibliography .16 ISO 630-6:2014(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
8、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. ISO collaborates closely with
9、the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed fo
10、r the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives). Attention is drawn to the possibility that some of the elements of this document may be the subject of patent right
11、s. ISO shall not be held responsible for identifying any or all such patent rights. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received (see www.iso.org/patents). Any trade name used in this
12、 document is information given for the convenience of users and does not constitute an endorsement. For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the WTO principles in the Technical Barriers to
13、 Trade (TBT) see the following URL: Foreword - Supplementary information The committee responsible for this document is ISO/TC 17, Steels, Subcommittee SC 3, Steels for structural purposes. This first edition of ISO 630-6 cancels and replaces ISO 24314:2006, of which it constitutes a technical revis
14、ion. 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 non alloy structural steels for general purpose Part 3: Technical delivery conditions for fine grai
15、n structural steels Part 4: Technical delivery conditions for high yield strength quenched and tempered structural steels Part 5: Technical delivery conditions for structural steels with improved atmospheric corrosion resistance Part 6: Technical delivery conditions for seismic-proof improved struct
16、ural steels for buildingiv ISO 2014 All rights reserved INTERNATIONAL ST ANDARD ISO 630-6:2014(E) Structural steels Part 6: Technical delivery conditions for seismic-improved structural steels for building 1 Scope This part of ISO 630 specifies qualities for seismic-proof improved structural steels.
17、 This part of ISO 630 applies to steel plates with thicknesses of 6 mm or over and up to 125 mm, wide flats and hot-rolled sections up to 140 mm, which are used in the usual delivery conditions as given in 6.2 and normally intended for welded or bolted structures. This part of ISO 630 does not inclu
18、de the following structural steels, certain of which are covered by other International Standards: sheet and strip refer to ISO TC 17/S C 12, Continuous mill flat rolled products; tubular products refer to ISO TC 5/SC 1, Steel tubes. 2 Normative references The following documents, in whole or in par
19、t, are normatively referenced in this document and are indispensable for its application. For dated references, 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 techn
20、ical delivery conditions for hot-rolled products ISO 7452:2013, Hot-rolled steel plates Tolerances on dimensions and shape ISO 7778, Through-thickness characteristics for steel products ISO 9034:1987, Hot-rolled structural steel wide flats Tolerances on dimensions and shape 3 T erms an d definiti on
21、s For the purposes of this document, the following terms and definitions apply. 3.1 as-rolled steel without any special rolling and/or heat treatment condition 3.2 normalized steel produced by heating to a suitable temperature above the transformation range and then cooling in air to a temperature s
22、ubstantially below the transformation range 3.3 quenching operation which consists of cooling a ferrous product more rapidly than in still air from a high temperature above Ac 1 Note 1 to entry: Ac 1is the temperature at which austenite begins to form during heating. ISO 2014 All rights reserved 1 I
23、SO 630-6:2014(E) 3.4 tempering heat treatment applied to a ferrous product, generally after quench hardening, or another heat treatment to bring the properties to the required level, and consisting of heating to specific temperatures ( Ac1) and soaking for an appropriate duration followed by cooling
24、 at an appropriate rate Note 1 to entry: Additionally, the following may apply: processes of direct quenching plus tempering. 3.5 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 c
25、ertain properties which cannot be achieved or repeated by heat treatment alone Note 1 to entry: Hot forming or post weld heat treatment above 580 C may lower the strength values and should not be performed. Flame straightening may be applied in accordance with relevant technical recommendations. Not
26、e 2 to entry: Thermomechanical rolling can include processes with an increasing cooling rate with or without tempering including self-tempering but excluding direct quenching and quenching and tempering. Note 3 to entry: In some publications the term “Thermomechanical Control Process” is also used.
27、4 Classific ation and designation 4.1 Classification The steel grades specified in this document shall be classified as unalloyed or alloy quality steels. 4.2 Grades and Qualities This document specifies four (4) steel grades Grades SA235, SA325, SA345, and SA440. Each grade is available in up to th
28、ree (3) qualities. Quality A: no impact testing Quality C: impact testing at 0 C Quality C+: impact testing at 0 C and through-thickness characteristics testing 5 Information to be supplied by purchaser 5.1 Mandatory information The information that shall be supplied by the purchaser at the time of
29、the order is specified in ISO 630-1. 5.2 Options The options 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 supplie
30、d 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 heat-treated. c) On special request of the p
31、urchaser, 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.2 ISO 2014 All rights reserved ISO 630-6:2014(E) d) On sp
32、ecial 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 product analysis. The product analysis shall be c
33、arried out at an agreed frequency when specified at the time of the order. e) Through thickness characteristics “Class 25” in accordance with ISO 7778 (see 6.4.3). 6 Requirements 6.1 Steel-making process See ISO 630-1. 6.2 Delivery condition The products are generally delivered in the as-rolled cond
34、ition, with the exception of grade SA440 which is normally produced using quenched and tempered or a thermomechanical rolling operation. For all other grades, unless otherwise agreed, the as rolled condition, normalized rolled, normalized or quenched and tempered condition are allowed at the manufac
35、turers discretion. The thermomechanical rolling is not allowed at the manufacturers discretion. When agreed upon between the purchaser and the manufacturer, thermomechanical rolling may be applied to any grade. 6.3 Chemical composition 6.3.1 Heat analysis The chemical composition determined by heat
36、analysis shall comply with the specified value in Table 1. 6.3.2 Product analysis The permissible deviations of product analysis shall comply with the values given in Table 2. Table 1 Chemical composition (heat analysis) Grade Thickness t mm C % max. Si % max Mn % P % max. S % max. Cu % max. Ni % ma
37、x. Cr % max. Mo % max. Nb + V + Ti % max. SA235 6 t 50 0,20 0,35 0,50 to 1,50 0,030 0,045 0,60 0,45 0,35 0,15 0,15 50 t 140 0,22 SA325 6 t 50 0,18 0,55 0,50 to 1,65 0,030 0,045 0,60 0,45 0,35 0,15 0,15 50 t 140 0,20 SA345 6 t 50 0,23 0,55 0,50 to 1,65 0,030 0,045 0,60 0,45 0,35 0,15 0,15 50 t 140 SA
38、440 6 t 50 0,18 0,55 0,50 to 1,65 0,030 0,045 0,60 0,45 0,35 0,15 0,15 50 t 140 0,20 If agreed between the purchaser and the manufacturer, the limitations of alloying elements other than those given may be applied. If agreed between the purchaser and the manufacturer, the lower limit of a maximum su
39、lfur content may be applied. ISO 2014 All rights reserved 3 ISO 630-6:2014(E) T able 2 Pe r m i t t e d dev i at ion f or t he pr o duc t a na l ysis r e l at i ve to t he s p e c i f ie d he at a na l ysis (see 5.2) Element Spec i f i ed limi t s % Permitted deviation % C 0,23 +0,03 Si 0,55 +0,05 M
40、n 0,50; 1,65 +0,10, 0,10 P 0,030 +0,005 S 0,045 +0,005 Cu 0,60 +0,07 Ni 0,45 +0,05 Cr 0,35 +0,05 Mo 0,15 +0,03 Nb + V + Ti 0,15 +0,02 6.3.3 Carbon equivalent (CEV) or parameter crack measurement (P CM ) 6.3.3.1 Carbon equivalent (CEV) The carbon equivalent value requirements are given in Table 3. Fo
41、r determining the CEV, the heat analysis value and the following International Institute for Welding (IIW) formula shall be used: CEVC Cr Mo VN iC u =+ + + + + Mn 65 15(1) In this respect, all the elements designated in the formula shall be used for calculation and reported, regardless of whether th
42、ose elements are intentionally added or not. If agreed between the purchaser and the manufacturer, Annex B may be applied for the formula of carbon equivalent and maximum value of carbon equivalent in place of Table 3 and Formula (1). Table 3 Maximum value of carbon equivalent Grade Maximum value of
43、 carbon equivalent % t 50 mm 50 t 140 mm SA235 0,35 0,35 SA325 0,46 0,48 SA345 0,45 0,47 SA440 0,47 0,49 The applicable thickness is t 2in the case of H-sections (see Table 10).4 ISO 2014 All rights reserved ISO 630-6:2014(E) 6.3.3.2 Parameter crack measurement (P CM ) If agreed between the purchase
44、r and manufacturer, the value of parameter crack measurement requirements shown in Table 4 may be applied instead of CEV. For determining the P CM , the heat analysis value and the following formula shall be used: PC Si 30 Mn 20 Cu 20 Ni 60 Cr 20 Mo 15 V 10 5B CM =+ + + + (2) In this respect, all th
45、e elements designated in the formula shall be used for calculation and reported, regardless of whether those elements are intentionally added or not. Table 4 Maximum value of parameter crack measurement Grade Maximum value of parameter crack measurement % SA235 0,26 SA325 0,29 SA345 0,28 SA440 0,30
46、6.3.4 Carbon equivalent (CEV) or parameter crack measurement (P CM ) for thermomechanically rolled steel products The maximum carbon equivalent value for the thermomechanically rolled steel products by agreement between the purchaser and manufacturer shall be as given in Table 5. Table 5 Maximum val
47、ue of carbon equivalent when thermomechanically rolled process is used Grade Maximum value of carbon equivalent % t 50 mm 50 t 140 mm SA325 0,37 0,39 SA345 0,39 0,39 SA440 0,44 0,47 The applicable thickness is t 2in the case of H-sections. Furthermore, the maximum value of parameter crack measuremen
48、t (P CM ) may be applied, instead of the maximum value of carbon equivalent subjected to the agreement between the purchaser and supplier. The maximum value of parameter crack measurement, in this case, shall be as given in Table 6. Table 6 Maximum value of parameter crack measurement when thermomec
49、hanically rolled process is used Grade Maximum value of parameter crack measurement % t 50 mm 50 t 140 mm SA325 0,24 0,26 SA345 0,26 0,26 SA440 0,28 0,30 ISO 2014 All rights reserved 5 ISO 630-6:2014(E) 6.4 Mechanical properties 6.4.1 Tensile properties The tensile properties at room temperature shall comply with the values specified in Table 7. 6.4.2 Charpy V-notch impact tests The impact properties of Charpy V-notch test pieces shall comply with
