1、BRITISH STANDARD BS EN ISO 2566-2:2001 Steel Conversion of elongation values Part 2: Austenitic steels The European Standard EN ISO 2566-2:1999 has the status of a British Standard ICS 77.040.10 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBS EN ISO 2566-2:2001 This British
2、Standard, having been prepared under the direction of the Engineering Sector Committee, was published under the authority of the Standards Committee and comes into effect on 15 September 2001 BSI 08-2001 ISBN 0 580 32679 9 National foreword This British Standard is the official English language vers
3、ion of EN ISO 2566-2:1999. It is identical with ISO 2566-2:1984. It supersedes BS 3894-2:1985 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee ISE/NFE/4, Mechanical testing of metals, to Subcommittee ISE/NFE/4, Uniaxial testing of metals, which has the
4、 responsibility to: A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references The British Standards which implement these international or European publications may be found in the BSI Standards Catalogue under the section entitled “Intern
5、ational Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a B
6、ritish Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international
7、 and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN ISO title page, the EN ISO foreword page, the ISO title page, the ISO foreword page, pages 1 to 28, the annex ZA page and a back cover. The BSI copyright no
8、tice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsEUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM ENISO25662 June1999 ICS77.040.00;77.040.10 Englishversion SteelConversionofelongationvaluesPart2:Austenitic steels(ISO
9、25662:1984) AcierConversiondesvaleursdallongementPartie2: Aciersaustnitiques(ISO25662:1984) StahlUmrechnungvonBruchdehnungswertenTeil2: AustenitischeSthle(ISO25662:1984) ThisEuropeanStandardwasapprovedbyCENon25April1999. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulateth
10、econditionsforgivingthisEurope an Standardthestatusofanationalstandardwithoutanyalteration.Uptodatelistsandbibliographicalreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheCentralSecretariatortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,Ger
11、man).Aversioninanyotherlanguagemadebytra nslation undertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheCentralSecretariathasthesamestatusast heofficial versions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,CzechRepublic,Denmark,Finland,France,Germany,Greece, Iceland,Irela
12、nd,Italy,Luxembourg,Netherlands,Norway,Portugal,Spain,Sweden,SwitzerlandandUnitedKingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG CentralSecretariat:ruedeStassart,36B1050Brussels 1999CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwi
13、deforCENnationalMembers. Ref.No.ENISO25662:1999E2egaP ENISO25662:1999 Foreword ThetextoftheInternationalStandardfromTechnicalCommitteeISO/TC17“Steel”ofthe InternationalOrganizationforStandardization(ISO)hasbeentakenoverasanEuropean StandardbyTechnicalCommitteeECISS/TC1“Steeltesting”,thesecretariatof
14、whichisheldby AFNOR. ThisEuropeanStandardshallbegiventhestatusofanationalstandard,eitherbypublicationof anidenticaltextorbyendorsement,atthelatestbyDecember1999,andconflictingnational standardsshallbewithdrawnatthelatestbyDecember1999. AccordingtotheCEN/CENELECInternalRegulations,thenationalstandard
15、sorganizationsofthe followingcountriesareboundtoimplementthisEuropeanStandard:Austria,Belgium,Czech Republic,Denmark,Finland,France,Germany,Greece,Iceland,Ireland,Italy,Luxembourg, Netherlands,Norway,Portugal,Spain,Sweden,SwitzerlandandtheUnitedKingdom. Endorsementnotice ThetextoftheInternationalSta
16、ndardISO25662:1984hasbeenapprovedbyCENasa EuropeanStandardwithoutanymodification.International Standard 2566/Z INTERNATIONAL ORGANIZATION FOR STANOAROIZATONWIIEMYHAPOHAR OPfAHM3AL proportional gauge lengths of k Gare also used for flat and round test pieces, where k may be one of a number of values,
17、 i.e. 4; 5,65; 8,16; and 11,3. The value 5,651/S0 is adopted as the internationally preferred proportional gauge length. Arising from this choice and the existence of specifications stipulating minimum percentage elongations on different gauge lengths, a growing need has been evident for an Internat
18、ional Standard which could be used to convert test results into values based on the different gauge lengths. This part of IS0 2566 accordingly includes tables of conversion factors, tables of actual conversions for some of the most commonly used gauge lengths and elongation values, and figures which
19、 may also be used for such conversions. When using these con- versions, however, note should be taken of the limitations on their applicability as stated in clause 1. While, as indicated, the conversions are considered to be reliable within the stated limitations, because of the various fac- tors in
20、fluencing the determination of percentage elongations, they shall be used for acceptance purposes only by agreement between the customer and supplier. In cases of dispute, the elongation shall be determined on the gauge length stated in the relevant specification. 1 Scope and field of application Th
21、is part of IS0 2566 specifies a method of converting room temperature percentage elongations after fracture obtained on various proportional and non-proportional gauge lengths to other gauge lengths. The formula (see clause 4) on which conversions are based is considered to be reliable when applied
22、to austenitic stainless steels within the tensile strength range 450 to 750 N/mm2 and in the solution treated condition. These conversions are not applicable to a) cold reduced steels; b) quenched and tempered steels; c) non-austenitic steels. Neither should they be used where the gauge length excee
23、ds 25a or where the width to thickness ratio of the test piece exceeds 20. Care should be exercised in the case of strip under 3 mm thickness, as the index in the formula given in clause 4 in- creases with decreasing thickness; the value to be used shall be the subject of agreement between the custo
24、mer and the supplier. 2 Symbols In this part of IS0 2566, the symbols shown in table 1 are used. Table 1 - List of symbols Symbol Description A Percentage elongation on gauge length, L, after fracture, obtained on test 4 Percentage elongation on a different gauge length, required by conversion d Dia
25、meter of test piece LO Original gauge length SO Original cross-sectional area of test piece 3 Definitions For the purpose of this part of IS0 2566, the following defini- tions apply : 3.1 gauge length : Any length of the parallel portion of the test piece used for measurement of strain. The term is
26、hereafter used in this part of IS0 2566 to denote the original gauge length, L, marked on the test piece for the determination of percentage elongation after fracture, A. 1 9991:26652OSINE3 ENISO25662:199910si 4891-2/6652 lE( 32 q proportional gauge length: A gauge length having a onwersion from a p
27、ro specified relation to the square root of the cross-sectional area, for example 5,65fi. th to a non-proportion The conversion factors are variable according to the cross- sectional area of the non-proportional test piece. Table 4 gives the multiplying factors for conversion from elongation on 5,65
28、6 to the equivalent on fixed gauge lengths of 50,80, 100 and 200 mm for a range of cross-sectional areas. For conver- sions in the reverse direction, i.e. elongation on a fixed gauge length to the equivalent of 5,65 Tables 7 to 10 can be used to obtain some of these conver- sions, whilst tables 15 t
29、o 18 can be used to obtain elongations on fixed gauge leng ths corresponding to 5,656. A is the elongation on a gauge length of 5,65dSo which is the internationally accepted gauge length; So and Lo are defined in table 1. Similarly, tables 11 to and tables 19 to 22 for responding to 4 6 14 can be us
30、ed for conversion to4JS, elongations on fixed gauge len gths cor- Expressed in terms of 42/S, the formula becomes 8 Conversion from a non-proportional gauge length to another non-proportional gauge length for test pieces of different cross- sectional areas where A is the elongation on a gauge length
31、 of 4a/Se. Tables 2 to 22 and figures 1 to 5 have been prepared on the basis of the above formulae. It is preferable for this calculation to be made in two stages with an initial conversion to 5,656. 5 Conversion from one proportional gauge length to another proportional gauge length Example: Simple
32、 multiplying factors based on the formula are used for such conversions, and the relationships between a number of the more widely used proportional gauge lengths are given in table 2. Detailed conversions of elongations obtained on 4 I c) the elongation obtained is A2 = ill., x A,. I Example: Elong
33、ation of 24 % on 200 mm for a 40 mm x 15 mm test piece in terms of equivalent on a 30 mm x 10 mm test piece with a gauge length equal to 100 mm. 4 200 - = a) K1 = 00 = 8,16 K2=-=-= iK2/ = 4.2 x Al I b) From figure 5, Al.2 = 1,04. , c) Elongation required is 24 x 1,04 = 25,0 %. Table 2 - Conversion f
34、actors : Proportional gauge lengths Conversion from : 46 565 6 83Jq II,36 4d 5d 8d 4J& 565 A/& 1,000 0,957 1,045 1,000 1,095 1,048 1,141 1,092 1,015 0,972 1,045 1,000 1,109 1,061 Factor for conversion to: wJ& ll,3A& 4d 5d 8d 0,913 0,876 0,985 0,957 0,902 0,954 0,916 1,029 1,000 0,942 1,000 0,959 1,0
35、78 Lo4-8 0,987 1,042 1,000 1,124 1,092 1,029 0,928 0,890 1,000 0,972 0,916 0,954 0,916 1,029 1,000 0,942 1,013 0,972 1,092 1,062 1,000 Table 3 - Conversion factors 9) Non-proportional gauge lengths Conversion from: 50 mm Factor for conversion to: 80 mm 100 mm 200 mm 50mm 1,000 0,942 0,916 0,839 80 m
36、m 1,062 1,000 0,972 0,890 100 mm 1,092 1,029 1,000 0,916 200 mm 1,193 1,123 1,092 1,000 1) Provided cross-sectional areas are the same. 3 9991:26652OSINE5 ENISO25662:199930SI 4891-2/6652 lE( Table 4- Conve rsion factors from 5,65 to non- Prop0 rtional gauge lengths Factors shown under “non-proportio
37、nal gauge lengths” give the value of 0,127 To convert from values on a w-w length of 5,65,&j to a non-proportional SFWW length, multiply by the appropriate factor. To convert from values on a non-proportional WJW length to 5,65&, divide by the appropriate factor. See also figures 1 and 2. Cross-sect
38、ional area of test piece mm2 Factor for non-proportional gauge length of: 200 mm 100 mm 80 mm 50 mm 5 0,706 0,771 0,794 0,842 10 0,738 0,806 0,829 0,880 15 0,757 0,827 0,851 0,903 20 0,771 0,842 0,867 0,920 25 0,782 0,854 0,879 0,933 30 0,792 0,864 o,= 0,944 35 0,779 0,873 0,898 0,953 40 0,806 o,=o
39、0,906 0,961 45 0,812 0,887 0,912 0,969 50 0,818 0,893 0,919 0,975 55 0,823 0,898 0,924 0,981 60 0,827 0,903 0,929 0,986 70 0,835 0,912 0,938 0,996 80 0,842 0,920 0,946 1,005 90 0,849 0,927 0,953 1,012 loo 0,854 0,933 0,960 1,019 110 0,860 0,939 0,966 1,025 120 0,864 0,944 0,971 1,031 130 0,869 0,949
40、 0,976 1,036 140 0,873 0,953 0,981 1,041 150 0,877 0,957 0,985 1,045 160 or=0 0,961 0,989 1,050 170 0,884 0,965 0,993 1,054 180 0,887 0,969 0,996 1,058 190 0,890 0,972 1,m 1,061 200 0,893 0,975 1,003 1,065 210 0,896 0,978 1,006 1,068 220 0,898 0,981 1,009 1,071 230 0,901 0,984 1,012 1,074 240 0,903
41、0,986 1,015 1,077 250 0,906 0,989 1,017 W 260 o,= 0,991 1,020 l,ofQ 270 0,910 0,994 1,022 1,085 280 0,912 0,996 1,025 Lo= 290 0,914 0,998 1,027 1,090 300 0,916 Loo0 310 0,918 1,003 320 0,920 1,005 330 0,922 1,007 340 0,923 1,008 350 0,925 1,010 360 0,927 1,012 370 0,928 1,014 380 0,930 1,016 390 0,932 1,017 1,029 1,031 1,033 1,035 1,037 1,039 1,041 1,043 1,045 1,047 1,093 1,095 1,097 1,099 1,101 1,103 1,105 1,107 1,109 1,111 9991:26652OSINE6 ENISO25662:19994
