1、Structural steels Part 2: Technical delivery conditions for structural steels for general purposes Aciers de construction Partie 2: Conditions techniques de livraison pour aciers de construction mtallique dusage gnral ISO 2011 Reference number ISO 630-2:2011(E) Second edition 2011-09-15 ISO 630-2 IN
2、TERNATIONAL STANDARDISO 630-2:2011(E)COPYRIGHT PROTECTED DOCUMENT ISO 2011 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 wri
3、ting 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 ii ISO 2011 All rights reservedISO 630-2
4、:2011(E)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 Use of normative annexes A and B 2 5 Information to be supplied by the purchaser 2 5.1 Mandatory information . 2
5、 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 3 6.5 Surface conditions 3 6.6 Internal soundness . 3 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 S235, S275, S355 and S450: Chemical composition and mechanical properties 5 Annex B (normative) Steel grades SG205, SG250, SG285 and SG345: Chemical composition and mechanical propert
7、ies .10 Bibliography .13 ISO 2011 All rights reserved iiiForeword 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 committee
8、s. 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 the Inter
9、national 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 International St
10、andards 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 sub
11、ject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 630-2 was prepared by Technical Committee ISO/TC 17, Steel, Subcommittee SC 3, Steels for structural purposes. This second edition cancels and replaces ISO 630:1995 and ISO 630:1995/Amd 1:2003
12、. The first edition has been replaced by ISO 12633-1 and this edition covers a new subject. 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 s
13、teels 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 Technical delivery conditions for structural steels with improved atmospheric corrosion resist
14、ance will form the subject of a future Part 5. Technical delivery conditions for seismic improved structural steels for building will form the subject of a future Part 6. ISO 630-2:2011(E)iv ISO 2011 All rights reservedINTERNATIONAL STANDARD ISO 630-2:2011(E)Structural steels Part 2: Technical deliv
15、ery conditions for structural steels for general purposes 1 Scope This part of ISO 630 specifies qualities for steels for general structural use. This part of ISO 630 applies to steel plates rolled on a reversing mill, wide flats, hot-rolled sections and bars, which are used in the as-delivered cond
16、ition and normally intended for welded or bolted structures. This part of ISO 630 covers eight steel grades and four qualities. Grades S235, S275, S355, and S450 are covered in Annex A. Grades SG205, SG250, SG285 and SG345 are covered in Annex B. Not all grades are available in all qualities, and so
17、me 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 products”; tubular products: refer to ISO TC 5/SC 1
18、 “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 references, only the edition cited applies. For undated
19、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 3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 630-1 and
20、 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 is carried out in a certain temperature range leading to a material condition equivalent to that obtained after norma
21、lizing so that the specified values of the mechanical properties are retained after normalizing NOTE In international publications for both normalized rolling, as well as thermomechanical rolling, the expression “controlled rolling” may be found. 3.3 normalized steel produced by heating to a suitabl
22、e temperature above the transformation range and then cooling in air to a temperature substantially below the transformation range ISO 2011 All rights reserved 13.4 thermomechanical processed steel rolled with a process in which the final deformation is carried out in a certain temperature range lea
23、ding 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 above 580 C may lower the strength values and should not be performed. Flame straightening can be applied in accordance with relevant techn
24、ical recommendations. NOTE 2 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 In some publications, the wording “Thermomechanical Control Process” is a
25、lso used. 4 Classification and designation 4.1 Classification The steel grades specified in this part of ISO 630 shall be classified as non-alloy or alloy quality steels. 4.2 Grades and qualities This part of ISO 630 specifies eight steel grades. Grades S235, S275, S355, and S450 are specified in An
26、nex A. Grades SG205, SG250, SG295, and SG345 are specified 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. Quality A: no impact testing. Quality B: impact testing at 20 C. Quality
27、C: impact testing at 0 C. Quality D: impact testing at -20 C. 4.3 Use of normative annexes A and B The requirements of Annex A or Annex B are to be regarded separately. Each is independent of the other without combining in any way. 5 Information to be supplied by the purchaser 5.1 Mandatory informat
28、ion The information that shall be supplied by the 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 option applies to products according to this part of ISO 630. If the purchaser does not indicate a wi
29、sh to implement any of these options at the time of ordering, the products shall be supplied in accordance with the basic specification (see 5.1). a) Required delivery condition. b) Testing of impact properties in the transverse direction using Charpy V-notch test pieces in accordance with ISO 630-1
30、. ISO 630-2:2011(E)2 ISO 2011 All rights reserved6 Requirements See ISO 630-1. 6.1 Steel-making process See ISO 630-1. If a special steel-making process has been specified, this shall be reported in the inspection document. 6.2 Delivery condition At the manufacturers discretion, the products covered
31、 by this part of ISO 630 are delivered in the as-rolled condition, normalized rolled, normalized, or thermomechanical processed condition. The delivery condition is indicated in the inspection document. 6.3 Chemical composition 6.3.1 Heat analysis The chemical composition determined by heat analysis
32、 shall comply with the values specified in Table A.1 or Table B.1. 6.3.2 Product analysis tolerances The product analysis of grades S235, S275, S355 and S450 shall comply with the values given in Table A.2. The permitted deviations on analysis of grades SG205, SG250, SG285 and SG345, relative to the
33、 values for heat analysis, are given in Table B.2. 6.3.3 Carbon-equivalent value The carbon-equivalent value (CEV) requirements for the grades in Annex A are given in Table A.3. 6.4 Mechanical properties 6.4.1 Tensile properties The tensile properties at ambient temperature shall comply with the val
34、ues specified in Tables A.4 and A.5 or Table B.3. 6.4.2 Charpy V-notch impact tests The impact properties of Charpy V-notch test pieces shall comply with the values specified in Table A.6 or Table B.4. The orientation of the specimens shall be longitudinal unless transverse orientation is agreed bet
35、ween purchaser and manufacturer (see 5.2 and ISO 630-1). 6.5 Surface conditions See ISO 630-1. 6.6 Internal soundness See ISO 630-1. ISO 630-2:2011(E) ISO 2011 All rights reserved 36.7 Dimensions and tolerances on dimensions, shape and mass See ISO 630-1. 7 Inspection Type of inspection documents (s
36、pecific or non-specific) shall be specified. Refer to ISO 630-1:2011, 7.1. 8 Sampling Frequency of testing 8.1 Verification The verification of mechanical properties shall be by heat. Verification by lot shall be by agreement between the producer and purchaser. 8.2 Test units 8.2.1 Annex A The test
37、unit shall contain products of the same form, grade, quality, and delivery condition, and of the same thickness range as specified in Table A.4 for the yield strength, and shall be: by heat: 40 tons or part thereof; 60 tons or part thereof for heavy sections with a mass 100 kg/m; 80 tons or part the
38、reof for all sections if the mass of the heat exceeds 200 tons. By agreement at the time of ordering, two tests by heat may be used. 8.2.2 Annex B The test unit shall contain products of the same form, grade, and quality, delivery condition and the same thickness range as specified in Table B.3 for
39、the yield strength and shall be 50 tons or part thereof. By agreement at time of ordering, two tests by heat may be used. 9 Test methods See ISO 630-1. 10 Marking See ISO 630-1. ISO 630-2:2011(E)4 ISO 2011 All rights reservedAnnex A (normative)Steel grades S235, S275, S355 and S450: Chemical composi
40、tion and mechanical properties Table A.1 Chemical composition (heat analysis)a Grade Quality Method of deoxi- dationb C in % max. for nominal product thickness in mm Si % max. Mn % max. P % max. d S % max. de N % max. f Cu % max. g Other % max. h 16 16 40 40c S235 B FN 0,17 0,17 0,20 1,40 0,035 0,03
41、5 0,012 0,55 C FN 0,17 0,17 0,17 1,40 0,030 0,030 0,012 0,55 D FF 0,17 0,17 0,17 1,40 0,025 0,025 0,55 S275 B FN 0,21 0,21 0,22 1,50 0,035 0,035 0,012 0,55 C FN 0,18 0,18 0,18i 1,50 0,030 0,030 0,012 0,55 D FF 0,18 0,18 0,18i 1,50 0,025 0,025 0,55 S355 B FN 0,24 0,24 0,24 0,55 1,60 0,035 0,035 0,012
42、 0,55 C FN 0,20 0,20j 0,22 0,55 1,60 0,030 0,030 0,012 0,55 D FF 0,20 0,20j 0,22 0,55 1,60 0,025 0,025 0,55 S450k C FF 0,20 0,20j 0,22 0,55 1,70 0,030 0,030 0,025 0,55 l aSee 6.3.1. bFN = rimming steels not permitted; FF = fully killed steel. cFor sections with nominal thickness 100 mm, the C conten
43、t is by agreement. dFor long products, the P and S content may be 0,005 % higher. eFor long products, the max. S content may be increased for improved machinability by 0,015 % by agreement if the steel is treated to modify the sulfide morphology, and if the chemical composition shows min. 0,002 0 %
44、Ca. fThe maximum value for nitrogen does not apply if the chemical composition shows a minimum total Al content of 0,020 % or, alternatively, minimum 0,015 % acid-soluble Al or if sufficient other N-binding elements are present. In this case, the N-binding elements shall be mentioned in the inspecti
45、on document. gCu content above 0,40 % can cause hot shortness during hot forming. hIf other elements are added, they shall be mentioned on the inspection document. iFor nominal thickness 150 mm: C = 0,20 % max. jFor nominal thickness 30 mm: C = 0,22 % max. kApplicable for long products only. lThe st
46、eel may show an Nb content of max. 0,05 %, a V content of max. 0,13 % and a Ti content of max. 0,05 %. ISO 630-2:2011(E) ISO 2011 All rights reserved 5Table A.2 Chemical composition of product analysis, according to the specification in Table A.1a Grade Quality Method of deoxi- dationb C in % max. f
47、or nominal product thickness in mm Si % max. Mn % max. P % max. d S % max. de N % max. f Cu % max. g Other % max. h 16 16 40 40c S235 B FN 0,19 0,19 0,23 1,50 0,045 0,045 0,014 0,60 C FN 0,19 0,19 0,19 1,50 0,040 0,040 0,014 0,60 D FF 0,19 0,19 0,19 1,50 0,035 0,035 0,60 S275 B FN 0,24 0,24 0,25 1,6
48、0 0,045 0,045 0,014 0,60 C FN 0,21 0,21 0,21i 1,60 0,040 0,040 0,014 0,60 D FF 0,21 0,21 0,21i 1,60 0,035 0,035 0,60 S355 B FN 0,27 0,27 0,27 0,60 1,70 0,045 0,045 0,014 0,60 C FN 0,23 0,23j 0,24 0,60 1,70 0,040 0,040 0,014 0,60 D FF 0,23 0,23j 0,24 0,60 1,70 0,035 0,035 0,60 S450k C FF 0,23 0,23j 0
49、,24 0,60 1,80 0,040 0,040 0,027 0,60 l aSee 6.3.2. bFN = rimming steels not permitted; FF = fully killed steel. cFor sections with nominal thickness 100 mm, the C content by agreement. dFor sections and bars, the P and S content may be 0,005 % higher. eFor sections and bars, the max. S content may be increased for improved machinability by 0,015 % by agreement, if the steel is treated to modify the sulphide morphology and the chemical
